./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test28-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test28-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/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 4ab8dcad35597bc77a09246c20c802a7c0b3d86b ................................................................................................................................................................................................................................................................................................................. 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 08:57:10,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:10,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:10,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:10,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:10,604 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:10,605 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:10,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:10,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:10,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:10,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:10,611 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:10,611 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:10,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:10,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:10,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:10,614 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:10,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:10,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:10,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:10,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:10,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:10,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:10,620 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:10,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:10,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:10,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:10,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:10,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:10,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:10,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:10,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:10,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:10,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:10,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:10,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:10,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:10,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:10,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:10,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:10,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:10,629 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:57:10,639 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:10,641 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:10,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:10,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:10,643 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:10,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:10,643 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:57:10,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:10,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:57:10,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:10,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:57:10,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:57:10,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:57:10,644 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:57:10,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:10,644 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:10,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:57:10,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:10,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:10,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:57:10,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:57:10,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:57:10,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:10,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:57:10,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:57:10,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:10,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:57:10,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:57:10,647 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_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/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 -> 4ab8dcad35597bc77a09246c20c802a7c0b3d86b [2019-10-22 08:57:10,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:10,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:10,683 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:10,684 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:10,684 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:10,685 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test28-1.c [2019-10-22 08:57:10,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/data/000cb9f73/2e071d4a21c244fc9110cf9ce398aa38/FLAG5043d5113 [2019-10-22 08:57:11,122 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:11,123 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/sv-benchmarks/c/ldv-regression/test28-1.c [2019-10-22 08:57:11,127 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/data/000cb9f73/2e071d4a21c244fc9110cf9ce398aa38/FLAG5043d5113 [2019-10-22 08:57:11,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/data/000cb9f73/2e071d4a21c244fc9110cf9ce398aa38 [2019-10-22 08:57:11,143 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:11,145 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:11,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:11,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:11,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:11,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72956611 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11, skipping insertion in model container [2019-10-22 08:57:11,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,160 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:11,174 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:11,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:11,418 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:11,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:11,450 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:11,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11 WrapperNode [2019-10-22 08:57:11,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:11,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:11,452 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:11,452 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:11,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,471 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:11,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:11,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:11,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:11,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... [2019-10-22 08:57:11,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:11,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:11,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:11,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:11,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/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 [2019-10-22 08:57:11,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 08:57:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:11,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-22 08:57:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 08:57:11,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 08:57:11,763 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:11,763 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:57:11,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:11 BoogieIcfgContainer [2019-10-22 08:57:11,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:11,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:57:11,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:57:11,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:57:11,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:57:11" (1/3) ... [2019-10-22 08:57:11,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777d6102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:11, skipping insertion in model container [2019-10-22 08:57:11,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:11" (2/3) ... [2019-10-22 08:57:11,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@777d6102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:57:11, skipping insertion in model container [2019-10-22 08:57:11,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:11" (3/3) ... [2019-10-22 08:57:11,772 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-1.c [2019-10-22 08:57:11,783 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:57:11,790 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:57:11,803 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:57:11,848 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:57:11,854 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:57:11,855 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:57:11,855 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:11,855 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:11,855 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:57:11,855 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:11,855 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:57:11,880 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2019-10-22 08:57:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:11,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:11,895 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:11,898 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:11,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash -594068692, now seen corresponding path program 1 times [2019-10-22 08:57:11,926 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:11,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742558816] [2019-10-22 08:57:11,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:11,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:11,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:12,084 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 08:57:12,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742558816] [2019-10-22 08:57:12,085 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:12,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:12,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197541214] [2019-10-22 08:57:12,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:57:12,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:12,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:12,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:12,106 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 5 states. [2019-10-22 08:57:12,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:12,185 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2019-10-22 08:57:12,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:12,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-10-22 08:57:12,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:12,198 INFO L225 Difference]: With dead ends: 28 [2019-10-22 08:57:12,198 INFO L226 Difference]: Without dead ends: 17 [2019-10-22 08:57:12,201 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:12,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-22 08:57:12,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2019-10-22 08:57:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-22 08:57:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-10-22 08:57:12,243 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-10-22 08:57:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:12,244 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-10-22 08:57:12,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:57:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-10-22 08:57:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:12,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:12,245 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:12,245 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:12,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:12,245 INFO L82 PathProgramCache]: Analyzing trace with hash -592221650, now seen corresponding path program 1 times [2019-10-22 08:57:12,246 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:12,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388827326] [2019-10-22 08:57:12,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:12,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:12,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:12,304 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 08:57:12,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388827326] [2019-10-22 08:57:12,305 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:12,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-22 08:57:12,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912969490] [2019-10-22 08:57:12,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:57:12,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:12,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:57:12,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:57:12,307 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2019-10-22 08:57:12,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:12,394 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2019-10-22 08:57:12,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:57:12,395 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2019-10-22 08:57:12,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:57:12,396 INFO L225 Difference]: With dead ends: 19 [2019-10-22 08:57:12,396 INFO L226 Difference]: Without dead ends: 10 [2019-10-22 08:57:12,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:57:12,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-10-22 08:57:12,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-10-22 08:57:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-10-22 08:57:12,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2019-10-22 08:57:12,399 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 9 [2019-10-22 08:57:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:57:12,399 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2019-10-22 08:57:12,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:57:12,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2019-10-22 08:57:12,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-22 08:57:12,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:57:12,400 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:12,400 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:57:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:12,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1180938670, now seen corresponding path program 1 times [2019-10-22 08:57:12,401 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:12,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476184732] [2019-10-22 08:57:12,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:12,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:12,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:12,452 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:12,452 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 08:57:12,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:57:12 BoogieIcfgContainer [2019-10-22 08:57:12,477 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:57:12,478 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:57:12,478 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:57:12,478 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:57:12,479 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:11" (3/4) ... [2019-10-22 08:57:12,481 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 08:57:12,523 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8e2f82cd-c9e7-452b-b359-0d858b5c63a2/bin/uautomizer/witness.graphml [2019-10-22 08:57:12,523 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:57:12,525 INFO L168 Benchmark]: Toolchain (without parser) took 1379.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -154.4 MB). Peak memory consumption was 29.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:12,531 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:12,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 305.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -231.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:12,532 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.72 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:12,532 INFO L168 Benchmark]: Boogie Preprocessor took 24.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:12,533 INFO L168 Benchmark]: RCFGBuilder took 247.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:12,533 INFO L168 Benchmark]: TraceAbstraction took 711.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 54.7 MB). Peak memory consumption was 54.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:12,533 INFO L168 Benchmark]: Witness Printer took 45.56 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 08:57:12,538 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 305.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.5 MB). Free memory was 943.4 MB in the beginning and 1.2 GB in the end (delta: -231.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.72 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.71 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 247.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 711.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 54.7 MB). Peak memory consumption was 54.7 MB. Max. memory is 11.5 GB. * Witness Printer took 45.56 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] struct dummy d1, d2; [L13] int n = __VERIFIER_nondet_int(); [L14] EXPR n ? &d1 : &d2 [L14] struct dummy *pd = n ? &d1 : &d2; [L15] COND TRUE pd == &d2 [L16] pd->a = 0 [L20] pd == &d2 && d2.b != 0 [L20] EXPR d2.b [L20] pd == &d2 && d2.b != 0 [L20] COND TRUE pd == &d2 && d2.b != 0 [L26] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 45 SDslu, 26 SDs, 0 SdLazy, 60 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 280 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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...