./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/skippedu.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/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/skippedu.c -s /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/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 e8f2cf545726d8f791bfc137e9eca7e9de4cb696 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-11-15 23:14:42,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:14:42,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:14:42,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:14:42,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:14:42,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:14:42,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:14:42,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:14:42,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:14:42,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:14:42,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:14:42,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:14:42,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:14:42,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:14:42,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:14:42,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:14:42,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:14:42,847 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:14:42,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:14:42,853 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:14:42,856 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:14:42,857 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:14:42,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:14:42,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:14:42,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:14:42,863 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:14:42,863 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:14:42,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:14:42,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:14:42,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:14:42,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:14:42,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:14:42,868 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:14:42,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:14:42,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:14:42,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:14:42,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:14:42,871 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:14:42,871 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:14:42,872 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:14:42,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:14:42,873 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 23:14:42,897 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:14:42,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:14:42,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:14:42,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:14:42,909 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:14:42,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:14:42,910 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 23:14:42,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:14:42,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 23:14:42,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:14:42,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 23:14:42,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 23:14:42,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 23:14:42,911 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 23:14:42,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:14:42,912 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:14:42,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 23:14:42,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:14:42,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:14:42,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 23:14:42,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 23:14:42,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 23:14:42,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:14:42,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 23:14:42,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 23:14:42,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:14:42,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 23:14:42,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 23:14:42,916 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_914a8636-d0cf-42c9-b468-5ea3c6798d03/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 -> e8f2cf545726d8f791bfc137e9eca7e9de4cb696 [2019-11-15 23:14:42,947 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:14:42,960 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:14:42,964 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:14:42,966 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:14:42,966 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:14:42,967 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/../../sv-benchmarks/c/array-tiling/skippedu.c [2019-11-15 23:14:43,026 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/data/2991af01f/5fb56cf51f4b45cbb70bac53c2358739/FLAGfd76b2893 [2019-11-15 23:14:43,433 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:14:43,434 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/sv-benchmarks/c/array-tiling/skippedu.c [2019-11-15 23:14:43,439 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/data/2991af01f/5fb56cf51f4b45cbb70bac53c2358739/FLAGfd76b2893 [2019-11-15 23:14:43,848 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/data/2991af01f/5fb56cf51f4b45cbb70bac53c2358739 [2019-11-15 23:14:43,852 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:14:43,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:14:43,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:14:43,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:14:43,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:14:43,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:14:43" (1/1) ... [2019-11-15 23:14:43,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6df1a1b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:43, skipping insertion in model container [2019-11-15 23:14:43,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:14:43" (1/1) ... [2019-11-15 23:14:43,872 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:14:43,892 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:14:44,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:14:44,169 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:14:44,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:14:44,216 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:14:44,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44 WrapperNode [2019-11-15 23:14:44,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:14:44,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:14:44,218 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:14:44,218 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:14:44,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:14:44,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:14:44,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:14:44,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:14:44,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,271 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... [2019-11-15 23:14:44,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:14:44,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:14:44,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:14:44,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:14:44,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/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 [2019-11-15 23:14:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 23:14:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 23:14:44,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:14:44,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:14:44,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 23:14:44,686 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:14:44,686 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-15 23:14:44,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:14:44 BoogieIcfgContainer [2019-11-15 23:14:44,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:14:44,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 23:14:44,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 23:14:44,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 23:14:44,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 11:14:43" (1/3) ... [2019-11-15 23:14:44,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4def48f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:14:44, skipping insertion in model container [2019-11-15 23:14:44,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:14:44" (2/3) ... [2019-11-15 23:14:44,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4def48f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 11:14:44, skipping insertion in model container [2019-11-15 23:14:44,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:14:44" (3/3) ... [2019-11-15 23:14:44,701 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2019-11-15 23:14:44,708 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 23:14:44,714 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 23:14:44,722 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 23:14:44,740 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 23:14:44,740 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 23:14:44,740 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 23:14:44,740 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:14:44,741 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:14:44,741 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 23:14:44,741 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:14:44,741 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 23:14:44,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-15 23:14:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 23:14:44,768 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:14:44,769 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:14:44,770 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:14:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:14:44,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1896653823, now seen corresponding path program 1 times [2019-11-15 23:14:44,780 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:14:44,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902184635] [2019-11-15 23:14:44,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:44,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:44,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:14:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:14:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:14:44,876 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902184635] [2019-11-15 23:14:44,877 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:14:44,877 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:14:44,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654725982] [2019-11-15 23:14:44,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 23:14:44,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:14:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 23:14:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 23:14:44,893 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-11-15 23:14:44,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:14:44,909 INFO L93 Difference]: Finished difference Result 39 states and 56 transitions. [2019-11-15 23:14:44,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 23:14:44,910 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-15 23:14:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:14:44,918 INFO L225 Difference]: With dead ends: 39 [2019-11-15 23:14:44,918 INFO L226 Difference]: Without dead ends: 18 [2019-11-15 23:14:44,920 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 [2019-11-15 23:14:44,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-15 23:14:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-15 23:14:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-15 23:14:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2019-11-15 23:14:44,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2019-11-15 23:14:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:14:44,948 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2019-11-15 23:14:44,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 23:14:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2019-11-15 23:14:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-15 23:14:44,949 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:14:44,949 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:14:44,949 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:14:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:14:44,950 INFO L82 PathProgramCache]: Analyzing trace with hash 866599033, now seen corresponding path program 1 times [2019-11-15 23:14:44,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:14:44,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036275947] [2019-11-15 23:14:44,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:44,950 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:44,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:14:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:14:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:14:45,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036275947] [2019-11-15 23:14:45,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:14:45,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 23:14:45,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710946067] [2019-11-15 23:14:45,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 23:14:45,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:14:45,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:14:45,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:14:45,030 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 3 states. [2019-11-15 23:14:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:14:45,090 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-11-15 23:14:45,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:14:45,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-15 23:14:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:14:45,091 INFO L225 Difference]: With dead ends: 33 [2019-11-15 23:14:45,091 INFO L226 Difference]: Without dead ends: 20 [2019-11-15 23:14:45,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:14:45,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-15 23:14:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-15 23:14:45,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-15 23:14:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-15 23:14:45,096 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2019-11-15 23:14:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:14:45,097 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-15 23:14:45,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 23:14:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-15 23:14:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-15 23:14:45,097 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:14:45,098 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:14:45,098 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:14:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:14:45,098 INFO L82 PathProgramCache]: Analyzing trace with hash -365251305, now seen corresponding path program 1 times [2019-11-15 23:14:45,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:14:45,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956204817] [2019-11-15 23:14:45,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:45,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:45,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:14:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:14:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:14:45,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956204817] [2019-11-15 23:14:45,174 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:14:45,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 23:14:45,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380266633] [2019-11-15 23:14:45,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 23:14:45,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:14:45,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 23:14:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:14:45,176 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-11-15 23:14:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:14:45,253 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2019-11-15 23:14:45,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 23:14:45,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-15 23:14:45,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:14:45,255 INFO L225 Difference]: With dead ends: 31 [2019-11-15 23:14:45,255 INFO L226 Difference]: Without dead ends: 24 [2019-11-15 23:14:45,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 23:14:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-15 23:14:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2019-11-15 23:14:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 23:14:45,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-11-15 23:14:45,259 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2019-11-15 23:14:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:14:45,260 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-11-15 23:14:45,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 23:14:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-11-15 23:14:45,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-15 23:14:45,260 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:14:45,261 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:14:45,261 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:14:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:14:45,261 INFO L82 PathProgramCache]: Analyzing trace with hash -388042032, now seen corresponding path program 1 times [2019-11-15 23:14:45,261 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:14:45,262 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528654785] [2019-11-15 23:14:45,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:45,262 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:45,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:14:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:14:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:14:45,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528654785] [2019-11-15 23:14:45,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754996545] [2019-11-15 23:14:45,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/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 [2019-11-15 23:14:45,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:14:45,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:14:45,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:14:45,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 23:14:45,469 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:14:45,470 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-15 23:14:45,470 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705249211] [2019-11-15 23:14:45,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-15 23:14:45,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:14:45,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-15 23:14:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:14:45,471 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2019-11-15 23:14:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:14:45,538 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-11-15 23:14:45,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-15 23:14:45,549 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-11-15 23:14:45,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:14:45,550 INFO L225 Difference]: With dead ends: 37 [2019-11-15 23:14:45,550 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 23:14:45,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-15 23:14:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 23:14:45,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-15 23:14:45,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-15 23:14:45,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-15 23:14:45,554 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2019-11-15 23:14:45,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:14:45,555 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-15 23:14:45,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-15 23:14:45,555 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-15 23:14:45,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 23:14:45,556 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:14:45,556 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:14:45,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:14:45,759 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:14:45,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:14:45,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1547350130, now seen corresponding path program 2 times [2019-11-15 23:14:45,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:14:45,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234615961] [2019-11-15 23:14:45,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:45,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:45,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:14:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:14:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:14:46,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234615961] [2019-11-15 23:14:46,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827977032] [2019-11-15 23:14:46,058 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:14:46,126 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-15 23:14:46,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 23:14:46,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-15 23:14:46,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:14:46,173 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 20 treesize of output 16 [2019-11-15 23:14:46,173 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 23:14:46,182 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:14:46,182 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:14:46,183 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-15 23:14:46,199 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 26 treesize of output 21 [2019-11-15 23:14:46,205 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:14:46,213 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:14:46,216 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-15 23:14:46,218 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2019-11-15 23:14:46,218 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-15 23:14:46,224 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:14:46,225 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:14:46,231 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 23:14:46,231 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 23:14:46,231 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:29, output treesize:20 [2019-11-15 23:14:46,269 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-15 23:14:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 23:14:46,290 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 23:14:46,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2019-11-15 23:14:46,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976513849] [2019-11-15 23:14:46,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-15 23:14:46,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:14:46,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-15 23:14:46,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-15 23:14:46,291 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 11 states. [2019-11-15 23:14:46,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:14:46,686 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2019-11-15 23:14:46,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-15 23:14:46,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-15 23:14:46,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 23:14:46,688 INFO L225 Difference]: With dead ends: 76 [2019-11-15 23:14:46,688 INFO L226 Difference]: Without dead ends: 74 [2019-11-15 23:14:46,689 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2019-11-15 23:14:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-15 23:14:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2019-11-15 23:14:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-15 23:14:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-11-15 23:14:46,706 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 19 [2019-11-15 23:14:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 23:14:46,707 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-11-15 23:14:46,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-15 23:14:46,707 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-11-15 23:14:46,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-15 23:14:46,709 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 23:14:46,709 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 23:14:46,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 23:14:46,920 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 23:14:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:14:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2067558796, now seen corresponding path program 1 times [2019-11-15 23:14:46,921 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:14:46,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750119327] [2019-11-15 23:14:46,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:46,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:14:46,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:14:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:14:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:14:47,039 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:14:47,039 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 23:14:47,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 11:14:47 BoogieIcfgContainer [2019-11-15 23:14:47,069 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 23:14:47,070 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:14:47,070 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:14:47,070 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:14:47,071 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:14:44" (3/4) ... [2019-11-15 23:14:47,073 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 23:14:47,139 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_914a8636-d0cf-42c9-b468-5ea3c6798d03/bin/uautomizer/witness.graphml [2019-11-15 23:14:47,139 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:14:47,140 INFO L168 Benchmark]: Toolchain (without parser) took 3287.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.1 MB). Free memory was 951.3 MB in the beginning and 996.9 MB in the end (delta: -45.6 MB). Peak memory consumption was 150.5 MB. Max. memory is 11.5 GB. [2019-11-15 23:14:47,141 INFO L168 Benchmark]: CDTParser took 0.26 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. [2019-11-15 23:14:47,141 INFO L168 Benchmark]: CACSL2BoogieTranslator took 359.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.1 MB). Free memory was 951.3 MB in the beginning and 1.2 GB in the end (delta: -239.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:14:47,142 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.61 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. [2019-11-15 23:14:47,142 INFO L168 Benchmark]: Boogie Preprocessor took 23.35 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. [2019-11-15 23:14:47,143 INFO L168 Benchmark]: RCFGBuilder took 408.19 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-15 23:14:47,143 INFO L168 Benchmark]: TraceAbstraction took 2381.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 996.9 MB in the end (delta: 170.2 MB). Peak memory consumption was 170.2 MB. Max. memory is 11.5 GB. [2019-11-15 23:14:47,143 INFO L168 Benchmark]: Witness Printer took 69.42 ms. Allocated memory is still 1.2 GB. Free memory is still 996.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:14:47,146 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 359.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 196.1 MB). Free memory was 951.3 MB in the beginning and 1.2 GB in the end (delta: -239.4 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 37.61 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 23.35 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 408.19 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2381.11 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 996.9 MB in the end (delta: 170.2 MB). Peak memory consumption was 170.2 MB. Max. memory is 11.5 GB. * Witness Printer took 69.42 ms. Allocated memory is still 1.2 GB. Free memory is still 996.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L7] int SIZE; [L9] const int MAX = 100000; VAL [MAX=100000, SIZE=0] [L13] SIZE = __VERIFIER_nondet_int() [L14] COND TRUE SIZE > 1 && SIZE < MAX [L16] int i; [L17] int *a = malloc(sizeof(int)*SIZE); [L19] i = 0 VAL [MAX=100000, SIZE=2] [L19] COND TRUE i < SIZE [L21] a[i] = __VERIFIER_nondet_int() [L19] i++ VAL [MAX=100000, SIZE=2] [L19] COND TRUE i < SIZE [L21] a[i] = __VERIFIER_nondet_int() [L19] i++ VAL [MAX=100000, SIZE=2] [L19] COND FALSE !(i < SIZE) VAL [MAX=100000, SIZE=2] [L24] COND FALSE !(SIZE % 2 != 0) [L27] i = 1 VAL [MAX=100000, SIZE=2] [L27] COND TRUE i <= SIZE/2 [L29] EXPR a[2*i-2] VAL [MAX=100000, SIZE=2] [L29] COND FALSE !(a[2*i-2] > i) [L33] EXPR a[2*i-1] VAL [MAX=100000, SIZE=2] [L33] COND TRUE a[2*i-1] > i [L35] a[2*i-1] = 2*i-1 VAL [MAX=100000, SIZE=2] [L27] i++ VAL [MAX=100000, SIZE=2] [L27] COND FALSE !(i <= SIZE/2) VAL [MAX=100000, SIZE=2] [L39] i = 0 VAL [MAX=100000, SIZE=2] [L39] COND TRUE i < SIZE [L41] a[i] [L3] COND TRUE !(cond) VAL [MAX=100000, SIZE=2] [L3] __VERIFIER_error() VAL [MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.3s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 145 SDslu, 69 SDs, 0 SdLazy, 198 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, 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, 5 MinimizatonAttempts, 37 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 123 NumberOfCodeBlocks, 123 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 7959 SizeOfPredicates, 12 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 11/15 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...