./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s3liff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s3liff.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 97475be9bfccf4dd577a5b4845abd7d13a4f25c3 ............................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-5485861 [2020-10-25 19:31:25,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 19:31:25,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 19:31:25,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 19:31:25,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 19:31:25,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 19:31:25,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 19:31:25,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 19:31:25,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 19:31:25,108 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 19:31:25,109 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 19:31:25,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 19:31:25,112 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 19:31:25,113 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 19:31:25,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 19:31:25,116 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 19:31:25,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 19:31:25,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 19:31:25,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 19:31:25,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 19:31:25,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 19:31:25,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 19:31:25,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 19:31:25,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 19:31:25,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 19:31:25,136 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 19:31:25,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 19:31:25,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 19:31:25,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 19:31:25,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 19:31:25,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 19:31:25,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 19:31:25,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 19:31:25,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 19:31:25,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 19:31:25,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 19:31:25,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 19:31:25,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 19:31:25,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 19:31:25,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 19:31:25,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 19:31:25,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 19:31:25,209 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 19:31:25,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 19:31:25,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 19:31:25,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 19:31:25,214 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 19:31:25,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 19:31:25,214 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 19:31:25,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 19:31:25,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 19:31:25,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 19:31:25,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 19:31:25,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 19:31:25,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 19:31:25,217 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 19:31:25,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 19:31:25,218 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 19:31:25,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 19:31:25,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 19:31:25,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 19:31:25,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 19:31:25,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 19:31:25,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 19:31:25,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 19:31:25,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 19:31:25,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 19:31:25,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 19:31:25,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 19:31:25,222 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 19:31:25,222 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 19:31:25,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97475be9bfccf4dd577a5b4845abd7d13a4f25c3 [2020-10-25 19:31:25,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 19:31:25,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 19:31:25,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 19:31:25,716 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 19:31:25,717 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 19:31:25,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s3liff.c [2020-10-25 19:31:25,809 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4e15ea0/715a1f9c41ce447ab3a086ede8bdd8c8/FLAG15ea289ce [2020-10-25 19:31:26,354 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 19:31:26,355 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s3liff.c [2020-10-25 19:31:26,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4e15ea0/715a1f9c41ce447ab3a086ede8bdd8c8/FLAG15ea289ce [2020-10-25 19:31:26,733 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b4e15ea0/715a1f9c41ce447ab3a086ede8bdd8c8 [2020-10-25 19:31:26,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 19:31:26,748 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 19:31:26,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 19:31:26,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 19:31:26,757 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 19:31:26,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:31:26" (1/1) ... [2020-10-25 19:31:26,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70ff2629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:26, skipping insertion in model container [2020-10-25 19:31:26,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 07:31:26" (1/1) ... [2020-10-25 19:31:26,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 19:31:26,797 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 19:31:27,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:31:27,042 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 19:31:27,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 19:31:27,121 INFO L208 MainTranslator]: Completed translation [2020-10-25 19:31:27,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27 WrapperNode [2020-10-25 19:31:27,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 19:31:27,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 19:31:27,127 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 19:31:27,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 19:31:27,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,210 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 19:31:27,213 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 19:31:27,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 19:31:27,214 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 19:31:27,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,258 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... [2020-10-25 19:31:27,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 19:31:27,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 19:31:27,282 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 19:31:27,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 19:31:27,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-25 19:31:27,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 19:31:27,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 19:31:27,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 19:31:27,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 19:31:27,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 19:31:27,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 19:31:27,385 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 19:31:27,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 19:31:27,794 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 19:31:27,794 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-25 19:31:27,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:31:27 BoogieIcfgContainer [2020-10-25 19:31:27,797 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 19:31:27,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 19:31:27,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 19:31:27,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 19:31:27,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 07:31:26" (1/3) ... [2020-10-25 19:31:27,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b948350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:31:27, skipping insertion in model container [2020-10-25 19:31:27,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 07:31:27" (2/3) ... [2020-10-25 19:31:27,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b948350 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 07:31:27, skipping insertion in model container [2020-10-25 19:31:27,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:31:27" (3/3) ... [2020-10-25 19:31:27,810 INFO L111 eAbstractionObserver]: Analyzing ICFG s3liff.c [2020-10-25 19:31:27,826 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 19:31:27,831 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 19:31:27,847 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 19:31:27,894 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 19:31:27,897 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 19:31:27,898 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 19:31:27,898 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 19:31:27,898 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 19:31:27,898 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 19:31:27,899 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 19:31:27,899 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 19:31:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-10-25 19:31:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 19:31:27,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:31:27,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:31:27,933 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:31:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:31:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2020-10-25 19:31:27,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:31:27,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872266938] [2020-10-25 19:31:27,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:31:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:31:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:31:28,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872266938] [2020-10-25 19:31:28,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:31:28,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 19:31:28,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199310950] [2020-10-25 19:31:28,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 19:31:28,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:31:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 19:31:28,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 19:31:28,139 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-10-25 19:31:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:31:28,158 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2020-10-25 19:31:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 19:31:28,160 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-10-25 19:31:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:31:28,178 INFO L225 Difference]: With dead ends: 41 [2020-10-25 19:31:28,178 INFO L226 Difference]: Without dead ends: 18 [2020-10-25 19:31:28,182 INFO L677 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 [2020-10-25 19:31:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-25 19:31:28,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-10-25 19:31:28,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-25 19:31:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-10-25 19:31:28,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2020-10-25 19:31:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:31:28,221 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-10-25 19:31:28,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 19:31:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-10-25 19:31:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 19:31:28,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:31:28,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:31:28,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 19:31:28,224 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:31:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:31:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2020-10-25 19:31:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:31:28,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510417727] [2020-10-25 19:31:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:31:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 19:31:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 19:31:28,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510417727] [2020-10-25 19:31:28,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 19:31:28,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-25 19:31:28,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303651127] [2020-10-25 19:31:28,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-25 19:31:28,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 19:31:28,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-25 19:31:28,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-25 19:31:28,381 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-10-25 19:31:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 19:31:28,476 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-25 19:31:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-25 19:31:28,477 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-25 19:31:28,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 19:31:28,479 INFO L225 Difference]: With dead ends: 36 [2020-10-25 19:31:28,479 INFO L226 Difference]: Without dead ends: 25 [2020-10-25 19:31:28,480 INFO L677 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 [2020-10-25 19:31:28,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-25 19:31:28,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-10-25 19:31:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-25 19:31:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-25 19:31:28,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-10-25 19:31:28,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 19:31:28,488 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-25 19:31:28,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-25 19:31:28,488 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-25 19:31:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-25 19:31:28,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 19:31:28,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 19:31:28,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 19:31:28,490 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 19:31:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 19:31:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2020-10-25 19:31:28,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 19:31:28,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809343238] [2020-10-25 19:31:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 19:31:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:31:28,553 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:31:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 19:31:28,641 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 19:31:28,680 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 19:31:28,680 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 19:31:28,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-25 19:31:28,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 07:31:28 BoogieIcfgContainer [2020-10-25 19:31:28,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 19:31:28,741 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 19:31:28,741 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 19:31:28,741 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 19:31:28,745 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 07:31:27" (3/4) ... [2020-10-25 19:31:28,747 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 19:31:28,827 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 19:31:28,827 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 19:31:28,830 INFO L168 Benchmark]: Toolchain (without parser) took 2089.52 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 31.7 MB in the beginning and 41.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:31:28,831 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 50.3 MB. Free memory is still 34.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 19:31:28,832 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.63 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 31.5 MB in the end (delta: -436.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:31:28,833 INFO L168 Benchmark]: Boogie Procedure Inliner took 85.51 ms. Allocated memory is still 50.3 MB. Free memory was 31.5 MB in the beginning and 30.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:31:28,833 INFO L168 Benchmark]: Boogie Preprocessor took 66.83 ms. Allocated memory is still 50.3 MB. Free memory was 30.0 MB in the beginning and 28.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 19:31:28,835 INFO L168 Benchmark]: RCFGBuilder took 516.87 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 28.7 MB in the beginning and 39.9 MB in the end (delta: -11.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-10-25 19:31:28,835 INFO L168 Benchmark]: TraceAbstraction took 940.18 ms. Allocated memory is still 62.9 MB. Free memory was 39.6 MB in the beginning and 44.1 MB in the end (delta: -4.5 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2020-10-25 19:31:28,836 INFO L168 Benchmark]: Witness Printer took 86.47 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 41.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 19:31:28,841 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 50.3 MB. Free memory is still 34.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 372.63 ms. Allocated memory is still 50.3 MB. Free memory was 31.1 MB in the beginning and 31.5 MB in the end (delta: -436.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 85.51 ms. Allocated memory is still 50.3 MB. Free memory was 31.5 MB in the beginning and 30.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.83 ms. Allocated memory is still 50.3 MB. Free memory was 30.0 MB in the beginning and 28.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 516.87 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 28.7 MB in the beginning and 39.9 MB in the end (delta: -11.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 940.18 ms. Allocated memory is still 62.9 MB. Free memory was 39.6 MB in the beginning and 44.1 MB in the end (delta: -4.5 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. * Witness Printer took 86.47 ms. Allocated memory is still 62.9 MB. Free memory was 44.1 MB in the beginning and 41.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 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: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = N [L32] i=0 VAL [N=1] [L32] COND TRUE i