./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/simple-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/simple-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0cf6b9a1a7372eb466349e319faa44cf865bdad ............................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:07:11,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:07:11,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:07:11,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:07:11,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:07:11,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:07:11,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:07:11,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:07:11,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:07:11,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:07:11,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:07:11,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:07:11,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:07:11,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:07:11,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:07:11,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:07:11,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:07:11,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:07:11,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:07:11,169 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:07:11,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:07:11,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:07:11,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:07:11,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:07:11,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:07:11,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:07:11,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:07:11,188 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:07:11,189 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:07:11,189 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:07:11,190 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:07:11,190 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:07:11,191 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:07:11,192 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:07:11,193 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:07:11,194 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:07:11,194 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:07:11,195 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:07:11,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:07:11,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:07:11,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:07:11,198 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:07:11,227 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:07:11,229 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:07:11,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:07:11,231 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:07:11,231 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:07:11,232 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:07:11,232 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:07:11,232 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:07:11,233 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:07:11,233 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:07:11,234 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:07:11,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:07:11,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:07:11,235 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:07:11,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:07:11,236 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:07:11,236 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:07:11,236 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:07:11,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:07:11,237 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:07:11,237 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:07:11,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:07:11,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:07:11,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:07:11,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:07:11,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:07:11,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:07:11,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:07:11,240 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0cf6b9a1a7372eb466349e319faa44cf865bdad [2019-11-16 00:07:11,277 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:07:11,294 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:07:11,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:07:11,300 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:07:11,300 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:07:11,301 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/../../sv-benchmarks/c/list-properties/simple-1.i [2019-11-16 00:07:11,370 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/data/beebb6db1/15947bad5213425488ea2bff07e413f5/FLAG593dbae70 [2019-11-16 00:07:11,837 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:07:11,838 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/sv-benchmarks/c/list-properties/simple-1.i [2019-11-16 00:07:11,850 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/data/beebb6db1/15947bad5213425488ea2bff07e413f5/FLAG593dbae70 [2019-11-16 00:07:12,201 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/data/beebb6db1/15947bad5213425488ea2bff07e413f5 [2019-11-16 00:07:12,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:07:12,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:07:12,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:07:12,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:07:12,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:07:12,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12588085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12, skipping insertion in model container [2019-11-16 00:07:12,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,227 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:07:12,278 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:07:12,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:07:12,726 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:07:12,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:07:12,828 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:07:12,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12 WrapperNode [2019-11-16 00:07:12,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:07:12,830 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:07:12,830 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:07:12,830 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:07:12,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:07:12,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:07:12,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:07:12,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:07:12,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... [2019-11-16 00:07:12,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:07:12,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:07:12,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:07:12,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:07:12,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:07:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-16 00:07:12,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-16 00:07:12,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-16 00:07:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-16 00:07:12,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-16 00:07:13,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:07:13,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:07:13,357 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:07:13,357 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-16 00:07:13,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:13 BoogieIcfgContainer [2019-11-16 00:07:13,359 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:07:13,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:07:13,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:07:13,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:07:13,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:07:12" (1/3) ... [2019-11-16 00:07:13,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2f4069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:13, skipping insertion in model container [2019-11-16 00:07:13,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:07:12" (2/3) ... [2019-11-16 00:07:13,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2f4069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:07:13, skipping insertion in model container [2019-11-16 00:07:13,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:13" (3/3) ... [2019-11-16 00:07:13,368 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-1.i [2019-11-16 00:07:13,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:07:13,385 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:07:13,396 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:07:13,420 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:07:13,420 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:07:13,420 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:07:13,420 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:07:13,420 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:07:13,421 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:07:13,421 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:07:13,421 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:07:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-16 00:07:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-16 00:07:13,443 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:07:13,443 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:07:13,445 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:07:13,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:07:13,451 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2019-11-16 00:07:13,461 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:07:13,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467816842] [2019-11-16 00:07:13,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:13,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:13,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:07:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:07:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:07:13,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467816842] [2019-11-16 00:07:13,602 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:07:13,602 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-16 00:07:13,602 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899597391] [2019-11-16 00:07:13,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-16 00:07:13,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:07:13,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-16 00:07:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-16 00:07:13,624 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-16 00:07:13,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:07:13,642 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2019-11-16 00:07:13,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-16 00:07:13,644 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-16 00:07:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:07:13,654 INFO L225 Difference]: With dead ends: 30 [2019-11-16 00:07:13,654 INFO L226 Difference]: Without dead ends: 14 [2019-11-16 00:07:13,657 INFO L600 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 [2019-11-16 00:07:13,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-16 00:07:13,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-16 00:07:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-16 00:07:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-16 00:07:13,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-16 00:07:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:07:13,693 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-16 00:07:13,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-16 00:07:13,694 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-16 00:07:13,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-16 00:07:13,694 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:07:13,694 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:07:13,695 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:07:13,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:07:13,695 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2019-11-16 00:07:13,695 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:07:13,696 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797418276] [2019-11-16 00:07:13,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:13,696 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:13,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:07:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:07:13,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:07:13,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797418276] [2019-11-16 00:07:13,826 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:07:13,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:07:13,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590890694] [2019-11-16 00:07:13,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:07:13,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:07:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:07:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:07:13,829 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-16 00:07:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:07:13,996 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-16 00:07:13,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-16 00:07:13,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-16 00:07:13,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:07:13,998 INFO L225 Difference]: With dead ends: 29 [2019-11-16 00:07:13,998 INFO L226 Difference]: Without dead ends: 27 [2019-11-16 00:07:13,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:07:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-16 00:07:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2019-11-16 00:07:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-16 00:07:14,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-16 00:07:14,004 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2019-11-16 00:07:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:07:14,005 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-16 00:07:14,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:07:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-16 00:07:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-16 00:07:14,005 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:07:14,006 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:07:14,006 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:07:14,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:07:14,006 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2019-11-16 00:07:14,007 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:07:14,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577118827] [2019-11-16 00:07:14,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:14,007 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:14,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:07:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:07:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:07:14,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577118827] [2019-11-16 00:07:14,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605707146] [2019-11-16 00:07:14,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:07:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:07:14,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-16 00:07:14,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:07:14,459 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-16 00:07:14,460 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:07:14,472 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:07:14,477 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-16 00:07:14,477 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:07:14,487 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:07:14,488 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:07:14,488 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-16 00:07:14,508 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:07:14,509 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-16 00:07:14,539 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:07:14,542 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-16 00:07:14,543 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-16 00:07:14,554 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-16 00:07:14,554 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-16 00:07:14,554 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-16 00:07:14,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:07:14,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:07:14,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-16 00:07:14,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34527581] [2019-11-16 00:07:14,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:07:14,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:07:14,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:07:14,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:07:14,559 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-11-16 00:07:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:07:14,687 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-16 00:07:14,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:07:14,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-16 00:07:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:07:14,689 INFO L225 Difference]: With dead ends: 33 [2019-11-16 00:07:14,689 INFO L226 Difference]: Without dead ends: 23 [2019-11-16 00:07:14,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:07:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-16 00:07:14,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2019-11-16 00:07:14,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-16 00:07:14,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-16 00:07:14,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-16 00:07:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:07:14,698 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-16 00:07:14,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:07:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-16 00:07:14,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-16 00:07:14,699 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:07:14,699 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:07:14,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:07:14,913 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:07:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:07:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2019-11-16 00:07:14,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:07:14,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691367437] [2019-11-16 00:07:14,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:14,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:07:14,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:07:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:07:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:07:15,012 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-16 00:07:15,023 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-16 00:07:15,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:07:15 BoogieIcfgContainer [2019-11-16 00:07:15,067 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:07:15,068 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:07:15,068 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:07:15,068 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:07:15,069 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:07:13" (3/4) ... [2019-11-16 00:07:15,071 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-16 00:07:15,117 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ab7559b1-3460-4699-8bd7-bff2273a6751/bin/uautomizer/witness.graphml [2019-11-16 00:07:15,118 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:07:15,119 INFO L168 Benchmark]: Toolchain (without parser) took 2913.93 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 939.4 MB in the beginning and 996.2 MB in the end (delta: -56.8 MB). Peak memory consumption was 80.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:07:15,120 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:07:15,121 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -175.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:07:15,121 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.10 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. [2019-11-16 00:07:15,122 INFO L168 Benchmark]: Boogie Preprocessor took 48.60 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:07:15,122 INFO L168 Benchmark]: RCFGBuilder took 433.82 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:07:15,123 INFO L168 Benchmark]: TraceAbstraction took 1707.79 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: 85.1 MB). Peak memory consumption was 85.1 MB. Max. memory is 11.5 GB. [2019-11-16 00:07:15,123 INFO L168 Benchmark]: Witness Printer took 49.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:07:15,134 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 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 623.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -175.0 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 46.10 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 48.60 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 433.82 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: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1707.79 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: 85.1 MB). Peak memory consumption was 85.1 MB. Max. memory is 11.5 GB. * Witness Printer took 49.76 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 996.2 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: 538]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); [L522] COND FALSE !(a == 0) [L523] List t; [L524] List p = a; [L525] a->h = 2 [L526] COND TRUE __VERIFIER_nondet_int() [L527] p->h = 1 [L528] t = (List) malloc(sizeof(struct node)) [L529] COND FALSE !(t == 0) [L530] p->n = t [L531] EXPR p->n [L531] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L533] p->h = 2 [L534] p->n = 0 [L535] p = a [L536] COND TRUE p!=0 [L537] EXPR p->h [L537] COND TRUE p->h != 2 [L538] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 39 SDslu, 47 SDs, 0 SdLazy, 58 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, 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, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 7 NumberOfNonLiveVariables, 54 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...