./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condaf.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_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condaf.c -s /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/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 d0fe87725d099c7309e1044eb65f43c72d424092 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 20:18:40,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 20:18:40,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 20:18:40,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 20:18:40,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 20:18:40,911 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 20:18:40,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 20:18:40,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 20:18:40,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 20:18:40,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 20:18:40,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 20:18:40,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 20:18:40,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 20:18:40,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 20:18:40,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 20:18:40,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 20:18:40,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 20:18:40,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 20:18:40,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 20:18:40,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 20:18:40,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 20:18:40,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 20:18:40,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 20:18:40,931 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 20:18:40,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 20:18:40,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 20:18:40,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 20:18:40,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 20:18:40,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 20:18:40,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 20:18:40,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 20:18:40,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 20:18:40,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 20:18:40,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 20:18:40,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 20:18:40,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 20:18:40,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 20:18:40,941 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 20:18:40,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 20:18:40,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 20:18:40,942 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 20:18:40,943 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-15 20:18:40,955 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 20:18:40,955 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 20:18:40,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 20:18:40,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 20:18:40,957 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 20:18:40,957 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 20:18:40,957 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-15 20:18:40,958 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 20:18:40,958 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-15 20:18:40,958 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 20:18:40,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-15 20:18:40,959 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-15 20:18:40,959 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-15 20:18:40,959 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-15 20:18:40,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 20:18:40,960 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 20:18:40,960 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-15 20:18:40,960 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 20:18:40,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 20:18:40,960 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-15 20:18:40,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-15 20:18:40,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-15 20:18:40,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 20:18:40,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-15 20:18:40,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-15 20:18:40,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 20:18:40,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-15 20:18:40,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-15 20:18:40,963 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_297abdc8-6536-42b4-aed6-54b902cb4f76/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 -> d0fe87725d099c7309e1044eb65f43c72d424092 [2019-11-15 20:18:40,989 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 20:18:40,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 20:18:41,001 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 20:18:41,012 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 20:18:41,012 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 20:18:41,013 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/../../sv-benchmarks/c/array-fpi/condaf.c [2019-11-15 20:18:41,069 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/data/67cdefba1/06f992194b124a17944c5768aaaf4b87/FLAGcdcba9449 [2019-11-15 20:18:41,482 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 20:18:41,483 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/sv-benchmarks/c/array-fpi/condaf.c [2019-11-15 20:18:41,489 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/data/67cdefba1/06f992194b124a17944c5768aaaf4b87/FLAGcdcba9449 [2019-11-15 20:18:41,903 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/data/67cdefba1/06f992194b124a17944c5768aaaf4b87 [2019-11-15 20:18:41,905 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 20:18:41,907 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 20:18:41,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 20:18:41,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 20:18:41,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 20:18:41,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:18:41" (1/1) ... [2019-11-15 20:18:41,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@219d31ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:41, skipping insertion in model container [2019-11-15 20:18:41,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 08:18:41" (1/1) ... [2019-11-15 20:18:41,920 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 20:18:41,934 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 20:18:42,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:18:42,219 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 20:18:42,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 20:18:42,260 INFO L192 MainTranslator]: Completed translation [2019-11-15 20:18:42,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42 WrapperNode [2019-11-15 20:18:42,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 20:18:42,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 20:18:42,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 20:18:42,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 20:18:42,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 20:18:42,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 20:18:42,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 20:18:42,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 20:18:42,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... [2019-11-15 20:18:42,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 20:18:42,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 20:18:42,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 20:18:42,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 20:18:42,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/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 20:18:42,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-15 20:18:42,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-15 20:18:42,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-15 20:18:42,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 20:18:42,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 20:18:42,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-15 20:18:42,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-15 20:18:42,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 20:18:42,758 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-15 20:18:42,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:18:42 BoogieIcfgContainer [2019-11-15 20:18:42,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 20:18:42,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-15 20:18:42,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-15 20:18:42,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-15 20:18:42,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.11 08:18:41" (1/3) ... [2019-11-15 20:18:42,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47807c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:18:42, skipping insertion in model container [2019-11-15 20:18:42,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 08:18:42" (2/3) ... [2019-11-15 20:18:42,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47807c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.11 08:18:42, skipping insertion in model container [2019-11-15 20:18:42,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:18:42" (3/3) ... [2019-11-15 20:18:42,766 INFO L109 eAbstractionObserver]: Analyzing ICFG condaf.c [2019-11-15 20:18:42,772 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-15 20:18:42,778 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-15 20:18:42,786 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-15 20:18:42,805 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-15 20:18:42,805 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-15 20:18:42,805 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-15 20:18:42,805 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 20:18:42,806 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 20:18:42,806 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-15 20:18:42,806 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 20:18:42,806 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-15 20:18:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-15 20:18:42,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 20:18:42,829 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:42,829 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:42,831 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:42,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:42,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1306593900, now seen corresponding path program 1 times [2019-11-15 20:18:42,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:42,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379841805] [2019-11-15 20:18:42,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:42,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:42,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:18:42,944 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 20:18:42,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379841805] [2019-11-15 20:18:42,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:18:42,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 20:18:42,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610976599] [2019-11-15 20:18:42,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-15 20:18:42,950 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:18:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-15 20:18:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-15 20:18:42,961 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-15 20:18:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:18:42,975 INFO L93 Difference]: Finished difference Result 35 states and 48 transitions. [2019-11-15 20:18:42,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-15 20:18:42,976 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-15 20:18:42,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:18:42,982 INFO L225 Difference]: With dead ends: 35 [2019-11-15 20:18:42,982 INFO L226 Difference]: Without dead ends: 16 [2019-11-15 20:18:42,984 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 20:18:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-15 20:18:43,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-15 20:18:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-15 20:18:43,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2019-11-15 20:18:43,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2019-11-15 20:18:43,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:18:43,012 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2019-11-15 20:18:43,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-15 20:18:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2019-11-15 20:18:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-15 20:18:43,013 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:43,013 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:43,013 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:43,013 INFO L82 PathProgramCache]: Analyzing trace with hash -875432925, now seen corresponding path program 1 times [2019-11-15 20:18:43,014 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:43,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607452432] [2019-11-15 20:18:43,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:43,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:43,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:18:43,081 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 20:18:43,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607452432] [2019-11-15 20:18:43,082 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:18:43,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-15 20:18:43,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131107399] [2019-11-15 20:18:43,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-15 20:18:43,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:18:43,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 20:18:43,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 20:18:43,084 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2019-11-15 20:18:43,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:18:43,144 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-11-15 20:18:43,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 20:18:43,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-15 20:18:43,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:18:43,145 INFO L225 Difference]: With dead ends: 29 [2019-11-15 20:18:43,146 INFO L226 Difference]: Without dead ends: 18 [2019-11-15 20:18:43,147 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 20:18:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-15 20:18:43,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-15 20:18:43,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 20:18:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-15 20:18:43,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2019-11-15 20:18:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:18:43,156 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-15 20:18:43,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-15 20:18:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-15 20:18:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-15 20:18:43,158 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:43,158 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:43,159 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:43,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:43,160 INFO L82 PathProgramCache]: Analyzing trace with hash -100050171, now seen corresponding path program 1 times [2019-11-15 20:18:43,160 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:43,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877964958] [2019-11-15 20:18:43,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:43,162 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:43,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:18:43,264 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 20:18:43,265 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877964958] [2019-11-15 20:18:43,265 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 20:18:43,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-15 20:18:43,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128677679] [2019-11-15 20:18:43,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-15 20:18:43,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:18:43,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-15 20:18:43,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-15 20:18:43,266 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 4 states. [2019-11-15 20:18:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:18:43,351 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2019-11-15 20:18:43,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-15 20:18:43,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-15 20:18:43,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:18:43,352 INFO L225 Difference]: With dead ends: 30 [2019-11-15 20:18:43,352 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 20:18:43,353 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 20:18:43,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 20:18:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-11-15 20:18:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-15 20:18:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-11-15 20:18:43,357 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2019-11-15 20:18:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:18:43,357 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-11-15 20:18:43,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-15 20:18:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2019-11-15 20:18:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 20:18:43,358 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:43,359 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:43,359 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:43,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:43,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1777901324, now seen corresponding path program 1 times [2019-11-15 20:18:43,360 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:43,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940601323] [2019-11-15 20:18:43,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:43,360 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:43,361 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:18:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 20:18:43,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940601323] [2019-11-15 20:18:43,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631229508] [2019-11-15 20:18:43,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/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 20:18:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 20:18:43,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-15 20:18:43,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 20:18:43,775 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-15 20:18:43,776 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 20:18:43,779 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 20:18:43,779 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 20:18:43,779 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-15 20:18:43,819 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-15 20:18:43,819 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-15 20:18:43,821 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-15 20:18:43,821 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-15 20:18:43,821 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-15 20:18:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-15 20:18:43,832 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 20:18:43,832 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-15 20:18:43,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519322349] [2019-11-15 20:18:43,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-15 20:18:43,833 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 20:18:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 20:18:43,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-15 20:18:43,834 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 10 states. [2019-11-15 20:18:44,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 20:18:44,050 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2019-11-15 20:18:44,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 20:18:44,051 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2019-11-15 20:18:44,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-15 20:18:44,052 INFO L225 Difference]: With dead ends: 34 [2019-11-15 20:18:44,052 INFO L226 Difference]: Without dead ends: 23 [2019-11-15 20:18:44,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2019-11-15 20:18:44,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-15 20:18:44,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-15 20:18:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-15 20:18:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-15 20:18:44,057 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 18 [2019-11-15 20:18:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-15 20:18:44,057 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-15 20:18:44,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-15 20:18:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-15 20:18:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-15 20:18:44,058 INFO L372 BasicCegarLoop]: Found error trace [2019-11-15 20:18:44,058 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 20:18:44,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 20:18:44,262 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-15 20:18:44,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 20:18:44,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1384874314, now seen corresponding path program 1 times [2019-11-15 20:18:44,263 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 20:18:44,263 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424346197] [2019-11-15 20:18:44,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:44,263 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 20:18:44,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 20:18:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 20:18:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 20:18:44,359 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 20:18:44,359 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-15 20:18:44,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.11 08:18:44 BoogieIcfgContainer [2019-11-15 20:18:44,388 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-15 20:18:44,389 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 20:18:44,389 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 20:18:44,389 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 20:18:44,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 08:18:42" (3/4) ... [2019-11-15 20:18:44,392 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-15 20:18:44,440 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_297abdc8-6536-42b4-aed6-54b902cb4f76/bin/uautomizer/witness.graphml [2019-11-15 20:18:44,440 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 20:18:44,441 INFO L168 Benchmark]: Toolchain (without parser) took 2534.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 951.4 MB in the beginning and 1.0 GB in the end (delta: -91.9 MB). Peak memory consumption was 102.1 MB. Max. memory is 11.5 GB. [2019-11-15 20:18:44,442 INFO L168 Benchmark]: CDTParser took 0.19 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 20:18:44,442 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -234.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-15 20:18:44,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.47 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 20:18:44,443 INFO L168 Benchmark]: Boogie Preprocessor took 25.38 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 20:18:44,444 INFO L168 Benchmark]: RCFGBuilder took 426.98 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: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. [2019-11-15 20:18:44,444 INFO L168 Benchmark]: TraceAbstraction took 1628.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 114.5 MB). Peak memory consumption was 114.5 MB. Max. memory is 11.5 GB. [2019-11-15 20:18:44,444 INFO L168 Benchmark]: Witness Printer took 51.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 20:18:44,446 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 354.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 951.4 MB in the beginning and 1.2 GB in the end (delta: -234.8 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 44.47 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 25.38 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 426.98 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: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1628.54 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 114.5 MB). Peak memory consumption was 114.5 MB. Max. memory is 11.5 GB. * Witness Printer took 51.17 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] int sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 0 [L27] i=0 VAL [N=1] [L27] COND TRUE i