./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ifeqn4f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ifeqn4f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2020-12-09 10:32:45,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:32:45,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:32:45,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:32:45,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:32:45,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:32:45,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:32:45,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:32:45,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:32:45,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:32:45,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:32:45,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:32:45,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:32:45,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:32:45,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:32:45,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:32:45,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:32:45,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:32:45,120 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:32:45,122 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:32:45,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:32:45,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:32:45,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:32:45,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:32:45,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:32:45,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:32:45,130 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:32:45,130 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:32:45,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:32:45,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:32:45,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:32:45,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:32:45,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:32:45,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:32:45,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:32:45,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:32:45,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:32:45,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:32:45,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:32:45,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:32:45,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:32:45,137 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:32:45,152 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:32:45,153 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:32:45,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:32:45,153 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:32:45,153 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:32:45,154 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:32:45,154 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:32:45,155 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:32:45,155 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:32:45,155 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:32:45,155 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:32:45,155 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:32:45,156 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:32:45,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:32:45,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:32:45,157 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:32:45,158 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:32:45,158 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eebb9b7e62b5fc3108854fe0ad79e9ef5b6cd643 [2020-12-09 10:32:45,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:32:45,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:32:45,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:32:45,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:32:45,353 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:32:45,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/../../sv-benchmarks/c/array-fpi/ifeqn4f.c [2020-12-09 10:32:45,394 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/data/61150ec59/6d9af8602c5d4296a5a8a6238dc4c165/FLAGf9adc21f8 [2020-12-09 10:32:45,757 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:32:45,757 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/sv-benchmarks/c/array-fpi/ifeqn4f.c [2020-12-09 10:32:45,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/data/61150ec59/6d9af8602c5d4296a5a8a6238dc4c165/FLAGf9adc21f8 [2020-12-09 10:32:45,771 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/data/61150ec59/6d9af8602c5d4296a5a8a6238dc4c165 [2020-12-09 10:32:45,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:32:45,774 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:32:45,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:32:45,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:32:45,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:32:45,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16d46f5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45, skipping insertion in model container [2020-12-09 10:32:45,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:32:45,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:32:45,887 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2020-12-09 10:32:45,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:32:45,905 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:32:45,914 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/sv-benchmarks/c/array-fpi/ifeqn4f.c[590,603] [2020-12-09 10:32:45,920 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:32:45,930 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:32:45,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45 WrapperNode [2020-12-09 10:32:45,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:32:45,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:32:45,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:32:45,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:32:45,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:32:45,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:32:45,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:32:45,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:32:45,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... [2020-12-09 10:32:45,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:32:45,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:32:45,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:32:45,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:32:45,976 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/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 [2020-12-09 10:32:46,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:32:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:32:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 10:32:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 10:32:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:32:46,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:32:46,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 10:32:46,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:32:46,328 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 10:32:46,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:32:46 BoogieIcfgContainer [2020-12-09 10:32:46,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:32:46,331 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:32:46,331 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:32:46,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:32:46,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:32:45" (1/3) ... [2020-12-09 10:32:46,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e955f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:32:46, skipping insertion in model container [2020-12-09 10:32:46,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:32:45" (2/3) ... [2020-12-09 10:32:46,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e955f94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:32:46, skipping insertion in model container [2020-12-09 10:32:46,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:32:46" (3/3) ... [2020-12-09 10:32:46,335 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn4f.c [2020-12-09 10:32:46,346 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:32:46,348 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:32:46,356 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:32:46,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:32:46,372 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:32:46,372 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:32:46,372 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:32:46,372 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:32:46,372 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:32:46,372 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:32:46,372 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:32:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-09 10:32:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 10:32:46,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:32:46,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:32:46,384 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:32:46,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:32:46,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1758921741, now seen corresponding path program 1 times [2020-12-09 10:32:46,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:32:46,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563092809] [2020-12-09 10:32:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:32:46,467 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:32:46,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239257397] [2020-12-09 10:32:46,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/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 [2020-12-09 10:32:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:32:46,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:32:46,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:32:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:32:46,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:32:46,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:32:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563092809] [2020-12-09 10:32:46,583 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:32:46,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239257397] [2020-12-09 10:32:46,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:32:46,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-12-09 10:32:46,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067886349] [2020-12-09 10:32:46,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 10:32:46,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:32:46,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 10:32:46,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:32:46,598 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-09 10:32:46,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:32:46,628 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2020-12-09 10:32:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 10:32:46,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 10:32:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:32:46,634 INFO L225 Difference]: With dead ends: 20 [2020-12-09 10:32:46,634 INFO L226 Difference]: Without dead ends: 10 [2020-12-09 10:32:46,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 10:32:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-09 10:32:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-09 10:32:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-09 10:32:46,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2020-12-09 10:32:46,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2020-12-09 10:32:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:32:46,657 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2020-12-09 10:32:46,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 10:32:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2020-12-09 10:32:46,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 10:32:46,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:32:46,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:32:46,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-09 10:32:46,860 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:32:46,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:32:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1256161657, now seen corresponding path program 1 times [2020-12-09 10:32:46,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:32:46,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520551239] [2020-12-09 10:32:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:32:46,945 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:32:46,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815626561] [2020-12-09 10:32:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/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 [2020-12-09 10:32:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:32:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 10:32:47,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:32:47,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:32:47,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:32:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:32:47,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520551239] [2020-12-09 10:32:47,067 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:32:47,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815626561] [2020-12-09 10:32:47,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:32:47,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2020-12-09 10:32:47,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418852123] [2020-12-09 10:32:47,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:32:47,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:32:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:32:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:32:47,069 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 5 states. [2020-12-09 10:32:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:32:47,096 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2020-12-09 10:32:47,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:32:47,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-09 10:32:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:32:47,096 INFO L225 Difference]: With dead ends: 21 [2020-12-09 10:32:47,097 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 10:32:47,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-09 10:32:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 10:32:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2020-12-09 10:32:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 10:32:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-12-09 10:32:47,099 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2020-12-09 10:32:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:32:47,100 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-12-09 10:32:47,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:32:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-12-09 10:32:47,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 10:32:47,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:32:47,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:32:47,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:32:47,301 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:32:47,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:32:47,302 INFO L82 PathProgramCache]: Analyzing trace with hash 285260138, now seen corresponding path program 1 times [2020-12-09 10:32:47,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:32:47,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116698502] [2020-12-09 10:32:47,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:32:47,331 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:32:47,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193989221] [2020-12-09 10:32:47,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:32:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:32:47,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-09 10:32:47,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:32:47,417 INFO L382 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 [2020-12-09 10:32:47,417 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 10:32:47,419 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:32:47,420 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 10:32:47,420 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 10:32:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 10:32:47,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:32:47,484 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:32:47,501 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 10:32:47,501 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2020-12-09 10:32:47,503 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-09 10:32:47,507 INFO L443 ElimStorePlain]: Different costs {0=[v_arrayElimCell_2], 2=[v_arrayElimCell_1]} [2020-12-09 10:32:47,515 WARN L838 $PredicateComparison]: unable to prove that (or (forall ((ULTIMATE.start_main_~a~0.base Int) (ULTIMATE.start_main_~b~0.base Int) (|#memory_int| (Array Int (Array Int Int))) (ULTIMATE.start_main_~a~0.offset Int) (ULTIMATE.start_main_~b~0.offset Int)) (= (select (let ((.cse0 (select |#memory_int| ULTIMATE.start_main_~b~0.base)) (.cse1 (* c_ULTIMATE.start_main_~i~0 8))) (store .cse0 (+ .cse1 ULTIMATE.start_main_~b~0.offset) (+ (select (select |#memory_int| ULTIMATE.start_main_~a~0.base) (+ ULTIMATE.start_main_~a~0.offset .cse1 (- 8))) (select .cse0 (+ .cse1 ULTIMATE.start_main_~b~0.offset (- 8)))))) ULTIMATE.start_main_~b~0.offset) 1)) (= c_ULTIMATE.start_main_~i~0 0)) is different from false [2020-12-09 10:32:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2020-12-09 10:32:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116698502] [2020-12-09 10:32:47,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:32:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193989221] [2020-12-09 10:32:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1336707539] [2020-12-09 10:32:47,537 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-12-09 10:32:47,537 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:32:47,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:32:47,544 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:32:47,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:32:47,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:32:48,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:32:48,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:32:48,461 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:32:48,591 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-12-09 10:32:48,823 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-12-09 10:32:48,964 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:32:48,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 10:32:48,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2020-12-09 10:32:48,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037947413] [2020-12-09 10:32:48,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 10:32:48,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:32:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 10:32:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=164, Unknown=1, NotChecked=26, Total=240 [2020-12-09 10:32:48,965 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 11 states. [2020-12-09 10:32:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:32:49,136 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-09 10:32:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 10:32:49,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2020-12-09 10:32:49,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:32:49,137 INFO L225 Difference]: With dead ends: 28 [2020-12-09 10:32:49,137 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 10:32:49,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=429, Unknown=1, NotChecked=44, Total=600 [2020-12-09 10:32:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 10:32:49,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 13. [2020-12-09 10:32:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-09 10:32:49,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-12-09 10:32:49,140 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2020-12-09 10:32:49,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:32:49,141 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-12-09 10:32:49,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 10:32:49,141 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-12-09 10:32:49,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 10:32:49,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:32:49,141 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:32:49,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:32:49,343 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:32:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:32:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1550353687, now seen corresponding path program 1 times [2020-12-09 10:32:49,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:32:49,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192992606] [2020-12-09 10:32:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:32:49,390 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:32:49,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398301122] [2020-12-09 10:32:49,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:32:49,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:32:49,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 10:32:49,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:32:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:32:49,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:32:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 10:32:49,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192992606] [2020-12-09 10:32:49,547 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:32:49,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398301122] [2020-12-09 10:32:49,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [353810385] [2020-12-09 10:32:49,549 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 10:32:49,549 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:32:49,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 10:32:49,550 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 10:32:49,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 10:32:49,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:32:49,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:32:50,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 10:32:50,210 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 10:32:50,359 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-12-09 10:32:50,708 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-12-09 10:32:50,863 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-12-09 10:32:50,863 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 10:32:50,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 10:32:50,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-09 10:32:50,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705844334] [2020-12-09 10:32:50,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 10:32:50,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:32:50,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 10:32:50,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-12-09 10:32:50,865 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 9 states. [2020-12-09 10:32:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:32:50,920 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-12-09 10:32:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 10:32:50,921 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-09 10:32:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:32:50,921 INFO L225 Difference]: With dead ends: 35 [2020-12-09 10:32:50,921 INFO L226 Difference]: Without dead ends: 21 [2020-12-09 10:32:50,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-12-09 10:32:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-09 10:32:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-12-09 10:32:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 10:32:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-09 10:32:50,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2020-12-09 10:32:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:32:50,924 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-09 10:32:50,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 10:32:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-09 10:32:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 10:32:50,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:32:50,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:32:51,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:32:51,127 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:32:51,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:32:51,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1712003936, now seen corresponding path program 2 times [2020-12-09 10:32:51,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:32:51,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143910792] [2020-12-09 10:32:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:32:51,146 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 10:32:51,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124629232] [2020-12-09 10:32:51,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:32:51,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 10:32:51,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-12-09 10:32:51,202 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:32:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 10:32:51,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 10:32:51,272 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 10:32:51,273 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 10:32:51,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:32:51,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:32:51 BoogieIcfgContainer [2020-12-09 10:32:51,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:32:51,521 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:32:51,521 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:32:51,521 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:32:51,521 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:32:46" (3/4) ... [2020-12-09 10:32:51,522 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 10:32:51,552 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f446917f-4875-497f-ab14-5b03bf39111f/bin/utaipan/witness.graphml [2020-12-09 10:32:51,552 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:32:51,553 INFO L168 Benchmark]: Toolchain (without parser) took 5779.36 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 68.0 MB in the beginning and 116.7 MB in the end (delta: -48.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:32:51,553 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 96.5 MB. Free memory is still 76.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:32:51,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.19 ms. Allocated memory is still 96.5 MB. Free memory was 67.8 MB in the beginning and 57.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:32:51,554 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 96.5 MB. Free memory was 57.7 MB in the beginning and 56.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:32:51,554 INFO L168 Benchmark]: Boogie Preprocessor took 17.76 ms. Allocated memory is still 96.5 MB. Free memory was 56.1 MB in the beginning and 54.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:32:51,554 INFO L168 Benchmark]: RCFGBuilder took 354.85 ms. Allocated memory is still 96.5 MB. Free memory was 54.8 MB in the beginning and 57.2 MB in the end (delta: -2.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2020-12-09 10:32:51,555 INFO L168 Benchmark]: TraceAbstraction took 5189.36 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 56.8 MB in the beginning and 119.8 MB in the end (delta: -63.0 MB). Peak memory consumption was 64.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:32:51,555 INFO L168 Benchmark]: Witness Printer took 32.06 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 116.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:32:51,556 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 96.5 MB. Free memory is still 76.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 156.19 ms. Allocated memory is still 96.5 MB. Free memory was 67.8 MB in the beginning and 57.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 96.5 MB. Free memory was 57.7 MB in the beginning and 56.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.76 ms. Allocated memory is still 96.5 MB. Free memory was 56.1 MB in the beginning and 54.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 354.85 ms. Allocated memory is still 96.5 MB. Free memory was 54.8 MB in the beginning and 57.2 MB in the end (delta: -2.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5189.36 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 56.8 MB in the beginning and 119.8 MB in the end (delta: -63.0 MB). Peak memory consumption was 64.1 MB. Max. memory is 16.1 GB. * Witness Printer took 32.06 ms. Allocated memory is still 142.6 MB. Free memory was 118.8 MB in the beginning and 116.7 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i