./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/splice-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/splice-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/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 336180afe1780bd2c4e24c39131e05a2fcb6ebf1 ................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 0.1.25-f470102 [2019-12-07 10:47:49,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 10:47:49,079 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 10:47:49,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 10:47:49,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 10:47:49,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 10:47:49,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 10:47:49,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 10:47:49,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 10:47:49,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 10:47:49,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 10:47:49,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 10:47:49,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 10:47:49,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 10:47:49,095 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 10:47:49,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 10:47:49,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 10:47:49,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 10:47:49,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 10:47:49,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 10:47:49,102 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 10:47:49,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 10:47:49,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 10:47:49,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 10:47:49,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 10:47:49,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 10:47:49,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 10:47:49,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 10:47:49,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 10:47:49,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 10:47:49,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 10:47:49,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 10:47:49,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 10:47:49,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 10:47:49,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 10:47:49,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 10:47:49,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 10:47:49,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 10:47:49,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 10:47:49,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 10:47:49,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 10:47:49,113 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-12-07 10:47:49,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 10:47:49,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 10:47:49,127 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 10:47:49,128 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 10:47:49,128 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 10:47:49,128 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 10:47:49,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 10:47:49,128 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 10:47:49,129 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 10:47:49,129 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 10:47:49,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 10:47:49,129 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 10:47:49,129 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 10:47:49,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 10:47:49,130 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 10:47:49,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 10:47:49,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 10:47:49,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 10:47:49,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 10:47:49,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 10:47:49,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 10:47:49,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 10:47:49,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 10:47:49,132 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 10:47:49,132 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 10:47:49,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 10:47:49,132 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 10:47:49,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 10:47:49,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 10:47:49,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 10:47:49,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 10:47:49,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 10:47:49,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 10:47:49,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 10:47:49,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 10:47:49,134 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 10:47:49,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 10:47:49,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 10:47:49,135 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 10:47:49,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 10:47:49,135 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_40458b0c-e4c5-4f14-9c49-987da2f5856b/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 -> 336180afe1780bd2c4e24c39131e05a2fcb6ebf1 [2019-12-07 10:47:49,247 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 10:47:49,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 10:47:49,259 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 10:47:49,261 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 10:47:49,261 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 10:47:49,262 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/../../sv-benchmarks/c/list-properties/splice-1.i [2019-12-07 10:47:49,308 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/data/661c6e305/ddbaf40f6bed4e6187b5bbb92a2d9d2a/FLAGed9d49678 [2019-12-07 10:47:49,749 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 10:47:49,750 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/sv-benchmarks/c/list-properties/splice-1.i [2019-12-07 10:47:49,760 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/data/661c6e305/ddbaf40f6bed4e6187b5bbb92a2d9d2a/FLAGed9d49678 [2019-12-07 10:47:50,095 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/data/661c6e305/ddbaf40f6bed4e6187b5bbb92a2d9d2a [2019-12-07 10:47:50,100 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 10:47:50,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 10:47:50,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 10:47:50,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 10:47:50,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 10:47:50,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af3fe1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50, skipping insertion in model container [2019-12-07 10:47:50,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 10:47:50,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 10:47:50,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:47:50,360 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 10:47:50,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 10:47:50,420 INFO L208 MainTranslator]: Completed translation [2019-12-07 10:47:50,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50 WrapperNode [2019-12-07 10:47:50,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 10:47:50,421 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 10:47:50,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 10:47:50,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 10:47:50,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,451 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 10:47:50,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 10:47:50,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 10:47:50,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 10:47:50,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,459 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,460 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... [2019-12-07 10:47:50,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 10:47:50,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 10:47:50,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 10:47:50,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 10:47:50,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/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 [2019-12-07 10:47:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 10:47:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 10:47:50,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 10:47:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 10:47:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 10:47:50,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 10:47:50,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 10:47:50,767 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 10:47:50,767 INFO L287 CfgBuilder]: Removed 12 assume(true) statements. [2019-12-07 10:47:50,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:47:50 BoogieIcfgContainer [2019-12-07 10:47:50,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 10:47:50,769 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 10:47:50,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 10:47:50,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 10:47:50,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 10:47:50" (1/3) ... [2019-12-07 10:47:50,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ce522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:47:50, skipping insertion in model container [2019-12-07 10:47:50,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 10:47:50" (2/3) ... [2019-12-07 10:47:50,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ce522e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 10:47:50, skipping insertion in model container [2019-12-07 10:47:50,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:47:50" (3/3) ... [2019-12-07 10:47:50,773 INFO L109 eAbstractionObserver]: Analyzing ICFG splice-1.i [2019-12-07 10:47:50,780 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 10:47:50,785 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 10:47:50,792 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 10:47:50,807 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 10:47:50,807 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 10:47:50,807 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 10:47:50,807 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 10:47:50,807 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 10:47:50,807 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 10:47:50,807 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 10:47:50,808 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 10:47:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-12-07 10:47:50,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 10:47:50,820 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:47:50,821 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:47:50,821 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:47:50,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:47:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash -682225541, now seen corresponding path program 1 times [2019-12-07 10:47:50,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:47:50,831 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812822959] [2019-12-07 10:47:50,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:47:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:47:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:47:50,914 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812822959] [2019-12-07 10:47:50,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:47:50,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 10:47:50,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473306318] [2019-12-07 10:47:50,918 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 10:47:50,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:47:50,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 10:47:50,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 10:47:50,928 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-12-07 10:47:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:47:50,939 INFO L93 Difference]: Finished difference Result 33 states and 49 transitions. [2019-12-07 10:47:50,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 10:47:50,940 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-12-07 10:47:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:47:50,946 INFO L225 Difference]: With dead ends: 33 [2019-12-07 10:47:50,946 INFO L226 Difference]: Without dead ends: 16 [2019-12-07 10:47:50,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 10:47:50,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-12-07 10:47:50,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-12-07 10:47:50,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 10:47:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2019-12-07 10:47:50,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2019-12-07 10:47:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:47:50,969 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2019-12-07 10:47:50,969 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 10:47:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2019-12-07 10:47:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 10:47:50,969 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:47:50,970 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:47:50,970 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:47:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:47:50,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1472890994, now seen corresponding path program 1 times [2019-12-07 10:47:50,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:47:50,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537076218] [2019-12-07 10:47:50,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:47:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:47:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 10:47:51,012 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537076218] [2019-12-07 10:47:51,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:47:51,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 10:47:51,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995310159] [2019-12-07 10:47:51,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:47:51,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:47:51,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:47:51,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:47:51,014 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 4 states. [2019-12-07 10:47:51,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:47:51,060 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2019-12-07 10:47:51,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 10:47:51,060 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-12-07 10:47:51,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:47:51,061 INFO L225 Difference]: With dead ends: 33 [2019-12-07 10:47:51,061 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 10:47:51,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:47:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 10:47:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2019-12-07 10:47:51,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-12-07 10:47:51,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-12-07 10:47:51,064 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2019-12-07 10:47:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:47:51,065 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-12-07 10:47:51,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:47:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-12-07 10:47:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-12-07 10:47:51,065 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:47:51,065 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:47:51,065 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:47:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:47:51,066 INFO L82 PathProgramCache]: Analyzing trace with hash -247438827, now seen corresponding path program 1 times [2019-12-07 10:47:51,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:47:51,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174173045] [2019-12-07 10:47:51,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:47:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:47:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 10:47:51,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174173045] [2019-12-07 10:47:51,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:47:51,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 10:47:51,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009835313] [2019-12-07 10:47:51,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:47:51,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:47:51,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:47:51,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:47:51,115 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 4 states. [2019-12-07 10:47:51,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:47:51,152 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2019-12-07 10:47:51,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 10:47:51,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-12-07 10:47:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:47:51,153 INFO L225 Difference]: With dead ends: 32 [2019-12-07 10:47:51,153 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 10:47:51,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:47:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 10:47:51,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2019-12-07 10:47:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 10:47:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-12-07 10:47:51,156 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2019-12-07 10:47:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:47:51,156 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-12-07 10:47:51,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:47:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-12-07 10:47:51,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 10:47:51,157 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:47:51,157 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:47:51,157 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:47:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:47:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash 920715610, now seen corresponding path program 1 times [2019-12-07 10:47:51,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:47:51,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039872367] [2019-12-07 10:47:51,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:47:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 10:47:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 10:47:51,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039872367] [2019-12-07 10:47:51,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 10:47:51,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-12-07 10:47:51,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323244576] [2019-12-07 10:47:51,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 10:47:51,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 10:47:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 10:47:51,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 10:47:51,203 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 4 states. [2019-12-07 10:47:51,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 10:47:51,238 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2019-12-07 10:47:51,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 10:47:51,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-12-07 10:47:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 10:47:51,239 INFO L225 Difference]: With dead ends: 27 [2019-12-07 10:47:51,239 INFO L226 Difference]: Without dead ends: 20 [2019-12-07 10:47:51,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 10:47:51,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-12-07 10:47:51,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-12-07 10:47:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 10:47:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-12-07 10:47:51,242 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 16 [2019-12-07 10:47:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 10:47:51,242 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-12-07 10:47:51,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 10:47:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-12-07 10:47:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-12-07 10:47:51,243 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 10:47:51,243 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 10:47:51,243 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 10:47:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 10:47:51,243 INFO L82 PathProgramCache]: Analyzing trace with hash -161561159, now seen corresponding path program 1 times [2019-12-07 10:47:51,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 10:47:51,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277423255] [2019-12-07 10:47:51,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 10:47:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:47:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 10:47:51,310 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 10:47:51,310 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 10:47:51,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 10:47:51 BoogieIcfgContainer [2019-12-07 10:47:51,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 10:47:51,333 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 10:47:51,333 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 10:47:51,333 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 10:47:51,333 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 10:47:50" (3/4) ... [2019-12-07 10:47:51,335 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 10:47:51,370 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_40458b0c-e4c5-4f14-9c49-987da2f5856b/bin/utaipan/witness.graphml [2019-12-07 10:47:51,371 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 10:47:51,372 INFO L168 Benchmark]: Toolchain (without parser) took 1270.72 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 939.9 MB in the beginning and 971.4 MB in the end (delta: -31.5 MB). Peak memory consumption was 71.2 MB. Max. memory is 11.5 GB. [2019-12-07 10:47:51,372 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 960.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:47:51,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -140.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-12-07 10:47:51,373 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 10:47:51,373 INFO L168 Benchmark]: Boogie Preprocessor took 19.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 10:47:51,373 INFO L168 Benchmark]: RCFGBuilder took 297.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. [2019-12-07 10:47:51,374 INFO L168 Benchmark]: TraceAbstraction took 563.48 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 976.8 MB in the end (delta: 64.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 11.5 GB. [2019-12-07 10:47:51,374 INFO L168 Benchmark]: Witness Printer took 37.76 ms. Allocated memory is still 1.1 GB. Free memory was 976.8 MB in the beginning and 971.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-07 10:47:51,375 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 960.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 317.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -140.4 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.45 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 297.29 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 33.7 MB). Peak memory consumption was 33.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 563.48 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 976.8 MB in the end (delta: 64.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 11.5 GB. * Witness Printer took 37.76 ms. Allocated memory is still 1.1 GB. Free memory was 976.8 MB in the beginning and 971.4 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] int flag = 1; [L522] List a = (List) malloc(sizeof(struct node)); [L523] COND FALSE !(a == 0) [L524] List t; [L525] List l1; [L526] List l2; [L527] List b; [L528] List u; [L529] List p = a; [L530] COND TRUE __VERIFIER_nondet_int() [L531] COND TRUE \read(flag) [L532] p->h = 1 [L533] flag = 0 [L538] t = (List) malloc(sizeof(struct node)) [L539] COND FALSE !(t == 0) [L540] p->n = t [L541] EXPR p->n [L541] p = p->n [L530] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 3 [L544] EXPR a->h [L544] COND FALSE !(a->h == 3) [L545] flag = 1 [L546] l1 = 0 [L547] l2 = 0 [L548] p = a [L549] EXPR p->h [L549] COND TRUE p->h != 3 [L550] t = p [L551] EXPR p->n [L551] p = p->n [L552] COND TRUE \read(flag) [L553] t->n = l1 [L554] l1 = t [L555] flag = 0 [L549] EXPR p->h [L549] COND FALSE !(p->h != 3) [L562] p = l1 [L563] COND TRUE p != 0 [L564] EXPR p->h [L564] COND TRUE p->h != 2 [L573] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 10 SDslu, 61 SDs, 0 SdLazy, 65 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=3, 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, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 49 ConstructedInterpolants, 0 QuantifiedInterpolants, 1629 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 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...