./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/fo_test.i --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/ldv-regression/fo_test.i -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 91ada1ee9a3d3f719ce9fee9994d11aa6e0c8b45 .................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/ldv-regression/fo_test.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 91ada1ee9a3d3f719ce9fee9994d11aa6e0c8b45 ................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:04:13,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:04:13,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:04:13,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:04:13,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:04:13,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:04:13,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:04:13,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:04:13,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:04:13,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:04:13,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:04:13,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:04:13,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:04:13,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:04:13,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:04:13,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:04:13,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:04:13,473 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:04:13,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:04:13,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:04:13,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:04:13,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:04:13,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:04:13,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:04:13,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:04:13,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:04:13,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:04:13,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:04:13,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:04:13,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:04:13,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:04:13,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:04:13,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:04:13,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:04:13,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:04:13,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:04:13,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:04:13,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:04:13,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:04:13,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:04:13,526 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:04:13,528 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:04:13,581 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:04:13,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:04:13,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:04:13,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:04:13,584 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:04:13,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:04:13,584 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:04:13,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:04:13,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:04:13,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:04:13,585 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:04:13,585 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:04:13,585 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:04:13,585 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:04:13,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:04:13,586 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:04:13,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:04:13,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:04:13,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:04:13,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:04:13,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:04:13,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:04:13,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:04:13,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:04:13,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:04:13,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:04:13,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:04:13,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:04:13,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:04:13,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91ada1ee9a3d3f719ce9fee9994d11aa6e0c8b45 [2020-10-25 22:04:14,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:04:14,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:04:14,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:04:14,047 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:04:14,048 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:04:14,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/fo_test.i [2020-10-25 22:04:14,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cacaace3e/bf0e9f421bd64823a22272b74b72efec/FLAGac1767045 [2020-10-25 22:04:14,954 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:04:14,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/fo_test.i [2020-10-25 22:04:14,972 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cacaace3e/bf0e9f421bd64823a22272b74b72efec/FLAGac1767045 [2020-10-25 22:04:15,151 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cacaace3e/bf0e9f421bd64823a22272b74b72efec [2020-10-25 22:04:15,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:04:15,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:04:15,161 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:15,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:04:15,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:04:15,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10abf735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15, skipping insertion in model container [2020-10-25 22:04:15,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:04:15,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:04:15,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:15,576 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:04:15,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:15,725 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:04:15,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15 WrapperNode [2020-10-25 22:04:15,727 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:15,728 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:15,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:04:15,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:04:15,738 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:15,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:04:15,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:04:15,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:04:15,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (1/1) ... [2020-10-25 22:04:15,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:04:15,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:04:15,819 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:04:15,819 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:04:15,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (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 22:04:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 22:04:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:04:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-25 22:04:15,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:04:15,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:04:15,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:04:16,307 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:04:16,307 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-25 22:04:16,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:16 BoogieIcfgContainer [2020-10-25 22:04:16,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:04:16,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:04:16,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:04:16,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:04:16,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:04:15" (1/3) ... [2020-10-25 22:04:16,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2490ac3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:16, skipping insertion in model container [2020-10-25 22:04:16,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:15" (2/3) ... [2020-10-25 22:04:16,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2490ac3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:16, skipping insertion in model container [2020-10-25 22:04:16,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:16" (3/3) ... [2020-10-25 22:04:16,322 INFO L111 eAbstractionObserver]: Analyzing ICFG fo_test.i [2020-10-25 22:04:16,337 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:04:16,343 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:04:16,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:04:16,400 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:04:16,400 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:04:16,401 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:04:16,401 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:04:16,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:04:16,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:04:16,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:04:16,401 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:04:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-10-25 22:04:16,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:04:16,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:16,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:04:16,431 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1804965446, now seen corresponding path program 1 times [2020-10-25 22:04:16,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:04:16,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092935195] [2020-10-25 22:04:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:04:16,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:04:16,750 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 22:04:16,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092935195] [2020-10-25 22:04:16,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:04:16,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:04:16,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242832894] [2020-10-25 22:04:16,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:04:16,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:04:16,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:04:16,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:04:16,777 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-10-25 22:04:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:04:16,815 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-25 22:04:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:04:16,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-25 22:04:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:04:16,829 INFO L225 Difference]: With dead ends: 24 [2020-10-25 22:04:16,830 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 22:04:16,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:04:16,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 22:04:16,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 22:04:16,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 22:04:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 22:04:16,870 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-25 22:04:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:04:16,871 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 22:04:16,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:04:16,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 22:04:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:04:16,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:16,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:04:16,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:04:16,872 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:16,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:16,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1806812488, now seen corresponding path program 1 times [2020-10-25 22:04:16,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:04:16,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604600880] [2020-10-25 22:04:16,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:04:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:16,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:16,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:16,999 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:04:17,000 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:04:17,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:04:17,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:04:17 BoogieIcfgContainer [2020-10-25 22:04:17,054 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:04:17,055 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:04:17,055 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:04:17,055 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:04:17,056 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:16" (3/4) ... [2020-10-25 22:04:17,061 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 22:04:17,061 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:04:17,064 INFO L168 Benchmark]: Toolchain (without parser) took 1906.78 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 29.9 MB in the beginning and 33.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:17,065 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 46.1 MB. Free memory was 31.8 MB in the beginning and 31.8 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:17,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 565.77 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 29.3 MB in the beginning and 34.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:17,067 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.88 ms. Allocated memory is still 56.6 MB. Free memory was 34.8 MB in the beginning and 32.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:17,068 INFO L168 Benchmark]: Boogie Preprocessor took 27.31 ms. Allocated memory is still 56.6 MB. Free memory was 32.7 MB in the beginning and 31.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:17,069 INFO L168 Benchmark]: RCFGBuilder took 493.26 ms. Allocated memory is still 56.6 MB. Free memory was 31.6 MB in the beginning and 30.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:17,070 INFO L168 Benchmark]: TraceAbstraction took 739.93 ms. Allocated memory is still 56.6 MB. Free memory was 29.8 MB in the beginning and 34.3 MB in the end (delta: -4.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:17,071 INFO L168 Benchmark]: Witness Printer took 6.19 ms. Allocated memory is still 56.6 MB. Free memory was 34.3 MB in the beginning and 34.0 MB in the end (delta: 275.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:17,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 46.1 MB. Free memory was 31.8 MB in the beginning and 31.8 MB in the end (delta: 52.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 565.77 ms. Allocated memory was 46.1 MB in the beginning and 56.6 MB in the end (delta: 10.5 MB). Free memory was 29.3 MB in the beginning and 34.8 MB in the end (delta: -5.4 MB). Peak memory consumption was 14.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 61.88 ms. Allocated memory is still 56.6 MB. Free memory was 34.8 MB in the beginning and 32.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.31 ms. Allocated memory is still 56.6 MB. Free memory was 32.7 MB in the beginning and 31.6 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 493.26 ms. Allocated memory is still 56.6 MB. Free memory was 31.6 MB in the beginning and 30.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 739.93 ms. Allocated memory is still 56.6 MB. Free memory was 29.8 MB in the beginning and 34.3 MB in the end (delta: -4.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 6.19 ms. Allocated memory is still 56.6 MB. Free memory was 34.3 MB in the beginning and 34.0 MB in the end (delta: 275.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of large string literal at line 1160. Possible FailurePath: [L1154] int globalState = 0; VAL [globalState=0] [L1172] int fd = open(file,flags); VAL [globalState=0] [L1173] COND FALSE !(fd>0) VAL [globalState=0] [L1174] return fd; VAL [globalState=0] [L1160] int file = l_open("unknown",00); [L1161] void* cbuf = (void*) malloc(sizeof(char)*100); [L1167] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=0] [L3] __assert_fail("0", "fo_test.i", 3, "reach_error") VAL [globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 5 SDslu, 5 SDs, 0 SdLazy, 3 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-5485861 [2020-10-25 22:04:19,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:04:19,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:04:19,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:04:19,704 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:04:19,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:04:19,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:04:19,710 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:04:19,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:04:19,713 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:04:19,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:04:19,716 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:04:19,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:04:19,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:04:19,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:04:19,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:04:19,722 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:04:19,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:04:19,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:04:19,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:04:19,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:04:19,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:04:19,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:04:19,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:04:19,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:04:19,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:04:19,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:04:19,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:04:19,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:04:19,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:04:19,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:04:19,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:04:19,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:04:19,745 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:04:19,746 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:04:19,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:04:19,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:04:19,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:04:19,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:04:19,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:04:19,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:04:19,753 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-25 22:04:19,821 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:04:19,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:04:19,825 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:04:19,827 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:04:19,828 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:04:19,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:04:19,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:04:19,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:04:19,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:04:19,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:04:19,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:04:19,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:04:19,832 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-25 22:04:19,832 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-25 22:04:19,833 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:04:19,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:04:19,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:04:19,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:04:19,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:04:19,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:04:19,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:04:19,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:04:19,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:04:19,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:04:19,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:04:19,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:04:19,836 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-25 22:04:19,837 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-25 22:04:19,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:04:19,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:04:19,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-25 22:04:19,838 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 91ada1ee9a3d3f719ce9fee9994d11aa6e0c8b45 [2020-10-25 22:04:20,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:04:20,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:04:20,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:04:20,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:04:20,366 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:04:20,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/fo_test.i [2020-10-25 22:04:20,456 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50d1eb78/1ea9508c20bf42878f432e71c61557a6/FLAGc0e1fd596 [2020-10-25 22:04:21,246 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:04:21,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/fo_test.i [2020-10-25 22:04:21,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50d1eb78/1ea9508c20bf42878f432e71c61557a6/FLAGc0e1fd596 [2020-10-25 22:04:21,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a50d1eb78/1ea9508c20bf42878f432e71c61557a6 [2020-10-25 22:04:21,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:04:21,505 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:04:21,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:21,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:04:21,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:04:21,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:21" (1/1) ... [2020-10-25 22:04:21,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f13cce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:21, skipping insertion in model container [2020-10-25 22:04:21,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:21" (1/1) ... [2020-10-25 22:04:21,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:04:21,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:04:21,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:21,960 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:04:22,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:22,122 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:04:22,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22 WrapperNode [2020-10-25 22:04:22,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:22,124 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:22,124 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:04:22,125 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:04:22,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,181 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:22,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:04:22,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:04:22,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:04:22,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (1/1) ... [2020-10-25 22:04:22,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:04:22,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:04:22,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:04:22,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:04:22,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (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 22:04:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 22:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-25 22:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-25 22:04:22,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:04:22,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:04:22,720 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:04:22,721 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-25 22:04:22,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:22 BoogieIcfgContainer [2020-10-25 22:04:22,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:04:22,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:04:22,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:04:22,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:04:22,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:04:21" (1/3) ... [2020-10-25 22:04:22,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6387d599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:22, skipping insertion in model container [2020-10-25 22:04:22,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:22" (2/3) ... [2020-10-25 22:04:22,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6387d599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:22, skipping insertion in model container [2020-10-25 22:04:22,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:22" (3/3) ... [2020-10-25 22:04:22,742 INFO L111 eAbstractionObserver]: Analyzing ICFG fo_test.i [2020-10-25 22:04:22,755 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:04:22,760 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:04:22,774 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:04:22,854 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:04:22,854 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:04:22,854 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:04:22,855 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:04:22,855 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:04:22,862 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:04:22,862 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:04:22,862 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:04:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-10-25 22:04:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:04:22,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:22,883 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:04:22,884 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:22,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1804965446, now seen corresponding path program 1 times [2020-10-25 22:04:22,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:04:22,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772883438] [2020-10-25 22:04:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-25 22:04:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:04:23,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-25 22:04:23,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:04:23,191 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 22:04:23,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-25 22:04:23,197 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 22:04:23,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772883438] [2020-10-25 22:04:23,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:04:23,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-25 22:04:23,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906412105] [2020-10-25 22:04:23,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:04:23,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-25 22:04:23,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:04:23,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:04:23,224 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-10-25 22:04:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:04:23,267 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-10-25 22:04:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:04:23,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-10-25 22:04:23,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:04:23,281 INFO L225 Difference]: With dead ends: 24 [2020-10-25 22:04:23,281 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 22:04:23,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:04:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 22:04:23,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 22:04:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 22:04:23,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 22:04:23,322 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 7 [2020-10-25 22:04:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:04:23,322 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 22:04:23,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:04:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 22:04:23,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:04:23,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:23,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:04:23,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-25 22:04:23,538 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:23,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:23,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1806812488, now seen corresponding path program 1 times [2020-10-25 22:04:23,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-25 22:04:23,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89913316] [2020-10-25 22:04:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-25 22:04:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:23,662 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:23,703 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:23,745 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-25 22:04:23,745 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:04:23,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-25 22:04:24,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:04:24 BoogieIcfgContainer [2020-10-25 22:04:24,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:04:24,006 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:04:24,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:04:24,006 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:04:24,007 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:22" (3/4) ... [2020-10-25 22:04:24,011 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-25 22:04:24,011 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:04:24,016 INFO L168 Benchmark]: Toolchain (without parser) took 2521.25 ms. Allocated memory was 44.0 MB in the beginning and 67.1 MB in the end (delta: 23.1 MB). Free memory was 19.3 MB in the beginning and 37.7 MB in the end (delta: -18.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:24,018 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 44.0 MB. Free memory was 27.2 MB in the beginning and 27.2 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:24,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.26 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 29.5 MB in the beginning and 31.6 MB in the end (delta: -2.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:24,021 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.99 ms. Allocated memory is still 54.5 MB. Free memory was 31.6 MB in the beginning and 29.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:24,022 INFO L168 Benchmark]: Boogie Preprocessor took 30.71 ms. Allocated memory is still 54.5 MB. Free memory was 29.5 MB in the beginning and 28.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:24,024 INFO L168 Benchmark]: RCFGBuilder took 518.81 ms. Allocated memory is still 54.5 MB. Free memory was 28.1 MB in the beginning and 36.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:24,025 INFO L168 Benchmark]: TraceAbstraction took 1270.69 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 36.3 MB in the beginning and 38.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:24,027 INFO L168 Benchmark]: Witness Printer took 5.67 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 37.7 MB in the end (delta: 346.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:24,032 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 44.0 MB. Free memory was 27.2 MB in the beginning and 27.2 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 614.26 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 29.5 MB in the beginning and 31.6 MB in the end (delta: -2.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.99 ms. Allocated memory is still 54.5 MB. Free memory was 31.6 MB in the beginning and 29.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.71 ms. Allocated memory is still 54.5 MB. Free memory was 29.5 MB in the beginning and 28.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 518.81 ms. Allocated memory is still 54.5 MB. Free memory was 28.1 MB in the beginning and 36.6 MB in the end (delta: -8.4 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1270.69 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 36.3 MB in the beginning and 38.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Witness Printer took 5.67 ms. Allocated memory is still 67.1 MB. Free memory was 38.1 MB in the beginning and 37.7 MB in the end (delta: 346.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of large string literal at line 1160. Possible FailurePath: [L1154] int globalState = 0; VAL [globalState=0] [L1172] int fd = open(file,flags); VAL [globalState=0] [L1173] COND FALSE !(fd>0) VAL [globalState=0] [L1174] return fd; VAL [globalState=0] [L1160] int file = l_open("unknown",00); [L1161] void* cbuf = (void*) malloc(sizeof(char)*100); [L1167] (globalState == 1) ? (0) : __blast_assert () VAL [globalState=0] [L3] __assert_fail("0", "fo_test.i", 3, "reach_error") VAL [globalState=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 5 SDslu, 5 SDs, 0 SdLazy, 3 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 216 SizeOfPredicates, 1 NumberOfNonLiveVariables, 62 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...