./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-2.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/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-2.i -s /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak --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 Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c54128245d3ab9ad313da188c7be33f66027c6a ....................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 10:18:38,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 10:18:38,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 10:18:38,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 10:18:38,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 10:18:38,134 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 10:18:38,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 10:18:38,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 10:18:38,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 10:18:38,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 10:18:38,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 10:18:38,142 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 10:18:38,142 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 10:18:38,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 10:18:38,143 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 10:18:38,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 10:18:38,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 10:18:38,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 10:18:38,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 10:18:38,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 10:18:38,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 10:18:38,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 10:18:38,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 10:18:38,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 10:18:38,162 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 10:18:38,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 10:18:38,162 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 10:18:38,163 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 10:18:38,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 10:18:38,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 10:18:38,164 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 10:18:38,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 10:18:38,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 10:18:38,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 10:18:38,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 10:18:38,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 10:18:38,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 10:18:38,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 10:18:38,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 10:18:38,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 10:18:38,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 10:18:38,176 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2019-10-22 10:18:38,190 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 10:18:38,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 10:18:38,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-22 10:18:38,191 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2019-10-22 10:18:38,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 10:18:38,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 10:18:38,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 10:18:38,192 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 10:18:38,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 10:18:38,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 10:18:38,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 10:18:38,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 10:18:38,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 10:18:38,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 10:18:38,195 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 10:18:38,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 10:18:38,195 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 10:18:38,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 10:18:38,196 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2019-10-22 10:18:38,196 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2019-10-22 10:18:38,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 10:18:38,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 10:18:38,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2019-10-22 10:18:38,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 10:18:38,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 10:18:38,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 10:18:38,197 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2019-10-22 10:18:38,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 10:18:38,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 10:18:38,198 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/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak 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 -> Kojak 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 -> 9c54128245d3ab9ad313da188c7be33f66027c6a [2019-10-22 10:18:38,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 10:18:38,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 10:18:38,243 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 10:18:38,244 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 10:18:38,246 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 10:18:38,247 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/../../sv-benchmarks/c/list-properties/alternating_list-2.i [2019-10-22 10:18:38,298 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/data/a07abc55c/5f26362d674a4b7faf8fbf1123a94d65/FLAGfe00c5702 [2019-10-22 10:18:38,720 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 10:18:38,721 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/sv-benchmarks/c/list-properties/alternating_list-2.i [2019-10-22 10:18:38,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/data/a07abc55c/5f26362d674a4b7faf8fbf1123a94d65/FLAGfe00c5702 [2019-10-22 10:18:39,071 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/data/a07abc55c/5f26362d674a4b7faf8fbf1123a94d65 [2019-10-22 10:18:39,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 10:18:39,075 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 10:18:39,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 10:18:39,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 10:18:39,078 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 10:18:39,079 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b4866a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39, skipping insertion in model container [2019-10-22 10:18:39,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,087 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 10:18:39,122 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 10:18:39,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:18:39,468 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 10:18:39,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 10:18:39,563 INFO L192 MainTranslator]: Completed translation [2019-10-22 10:18:39,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39 WrapperNode [2019-10-22 10:18:39,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 10:18:39,565 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 10:18:39,565 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 10:18:39,565 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 10:18:39,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,586 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 10:18:39,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 10:18:39,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 10:18:39,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 10:18:39,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:39,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 10:18:39,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 10:18:39,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 10:18:39,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 10:18:39,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (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:10000 [2019-10-22 10:18:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-10-22 10:18:39,685 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-10-22 10:18:39,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 10:18:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 10:18:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-22 10:18:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-22 10:18:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-22 10:18:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 10:18:39,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 10:18:39,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 10:18:39,806 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-10-22 10:18:39,986 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 10:18:39,987 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 10:18:39,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:39 BoogieIcfgContainer [2019-10-22 10:18:39,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 10:18:39,988 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2019-10-22 10:18:39,988 INFO L271 PluginConnector]: Initializing CodeCheck... [2019-10-22 10:18:39,999 INFO L275 PluginConnector]: CodeCheck initialized [2019-10-22 10:18:39,999 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:39" (1/1) ... [2019-10-22 10:18:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 10:18:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:18:40,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 26 states and 36 transitions. [2019-10-22 10:18:40,075 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-22 10:18:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-22 10:18:40,076 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:18:40,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:18:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:18:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:18:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2019-10-22 10:18:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2019-10-22 10:18:40,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 10:18:40,204 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:18:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:18:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:18:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:18:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 29 states and 38 transitions. [2019-10-22 10:18:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2019-10-22 10:18:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-22 10:18:40,302 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:18:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 10:18:40,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 10:18:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-10-22 10:18:40,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 34 states and 46 transitions. [2019-10-22 10:18:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2019-10-22 10:18:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-22 10:18:40,610 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-10-22 10:18:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:18:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:18:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:18:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 10:18:40,775 WARN L489 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2019-10-22 10:18:40,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 22.10 10:18:40 ImpRootNode [2019-10-22 10:18:40,815 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2019-10-22 10:18:40,816 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 10:18:40,816 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 10:18:40,816 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 10:18:40,816 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:39" (3/4) ... [2019-10-22 10:18:40,818 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 10:18:40,859 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_0ddb7cf9-8387-4487-b46a-c20d6a439404/bin/ukojak/witness.graphml [2019-10-22 10:18:40,859 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 10:18:40,861 INFO L168 Benchmark]: Toolchain (without parser) took 1785.88 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 939.1 MB in the beginning and 1.0 GB in the end (delta: -65.2 MB). Peak memory consumption was 55.9 MB. Max. memory is 11.5 GB. [2019-10-22 10:18:40,861 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 10:18:40,862 INFO L168 Benchmark]: CACSL2BoogieTranslator took 488.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -165.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-10-22 10:18:40,863 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.40 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-10-22 10:18:40,863 INFO L168 Benchmark]: Boogie Preprocessor took 30.80 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. [2019-10-22 10:18:40,863 INFO L168 Benchmark]: RCFGBuilder took 351.64 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: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. [2019-10-22 10:18:40,864 INFO L168 Benchmark]: CodeCheck took 826.98 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: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 11.5 GB. [2019-10-22 10:18:40,864 INFO L168 Benchmark]: Witness Printer took 43.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 10:18:40,866 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 27 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 24 SDslu, 32 SDs, 0 SdLazy, 52 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 223 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 601 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 562]: 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 p = a; [L526] COND TRUE __VERIFIER_nondet_int() [L527] COND TRUE \read(flag) [L528] p->h = 2 [L529] flag = 0 [L534] t = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(t == 0) [L536] p->n = t [L537] EXPR p->n [L537] p = p->n [L526] COND FALSE !(__VERIFIER_nondet_int()) [L539] p->h = 3 [L540] p = a [L541] flag = 1 [L542] EXPR p->h [L542] COND TRUE p->h != 3 [L543] COND TRUE \read(flag) [L544] flag = 0 [L545] EXPR p->h [L545] COND TRUE p->h != 1 [L562] __VERIFIER_error() * 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 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 488.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 939.1 MB in the beginning and 1.1 GB in the end (delta: -165.5 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.40 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 30.80 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 351.64 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: 30.7 MB). Peak memory consumption was 30.7 MB. Max. memory is 11.5 GB. * CodeCheck took 826.98 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: 62.6 MB). Peak memory consumption was 62.6 MB. Max. memory is 11.5 GB. * Witness Printer took 43.69 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...