./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test06.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/ldv-regression/test06.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 83c9fca06a756d42969949997a10968e5a1902b6 ............................................................................................................................................................................................................................................................................................. 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 22:04:55,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:04:55,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:04:55,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:04:55,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:04:55,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:04:55,831 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:04:55,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:04:55,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:04:55,837 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:04:55,838 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:04:55,839 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:04:55,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:04:55,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:04:55,843 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:04:55,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:04:55,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:04:55,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:04:55,848 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:04:55,850 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:04:55,852 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:04:55,853 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:04:55,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:04:55,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:04:55,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:04:55,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:04:55,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:04:55,861 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:04:55,862 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:04:55,863 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:04:55,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:04:55,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:04:55,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:04:55,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:04:55,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:04:55,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:04:55,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:04:55,869 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:04:55,869 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:04:55,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:04:55,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:04:55,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:04:55,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:04:55,907 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:04:55,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:04:55,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:04:55,909 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:04:55,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:04:55,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:04:55,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:04:55,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:04:55,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:04:55,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:04:55,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:04:55,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:04:55,911 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:04:55,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:04:55,911 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:04:55,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:04:55,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:04:55,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:04:55,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:04:55,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:04:55,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:04:55,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:04:55,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:04:55,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:04:55,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:04:55,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:04:55,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:04:55,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:04:55,915 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c9fca06a756d42969949997a10968e5a1902b6 [2020-10-25 22:04:56,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:04:56,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:04:56,307 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:04:56,308 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:04:56,309 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:04:56,311 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test06.c [2020-10-25 22:04:56,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d08985bf/4b0547886827473389aa74e1f97fa106/FLAG7c5a24123 [2020-10-25 22:04:56,892 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:04:56,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test06.c [2020-10-25 22:04:56,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d08985bf/4b0547886827473389aa74e1f97fa106/FLAG7c5a24123 [2020-10-25 22:04:57,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d08985bf/4b0547886827473389aa74e1f97fa106 [2020-10-25 22:04:57,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:04:57,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:04:57,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:57,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:04:57,309 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:04:57,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d6ca7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57, skipping insertion in model container [2020-10-25 22:04:57,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:04:57,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:04:57,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:57,572 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:04:57,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:04:57,608 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:04:57,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57 WrapperNode [2020-10-25 22:04:57,609 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:04:57,610 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:57,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:04:57,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:04:57,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:04:57,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:04:57,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:04:57,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:04:57,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (1/1) ... [2020-10-25 22:04:57,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:04:57,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:04:57,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:04:57,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:04:57,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (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 22:04:57,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-25 22:04:57,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:04:57,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-25 22:04:57,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:04:57,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 22:04:57,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:04:57,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:04:57,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:04:57,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:04:58,170 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:04:58,171 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-25 22:04:58,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:58 BoogieIcfgContainer [2020-10-25 22:04:58,172 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:04:58,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:04:58,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:04:58,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:04:58,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:04:57" (1/3) ... [2020-10-25 22:04:58,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb049ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:58, skipping insertion in model container [2020-10-25 22:04:58,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:04:57" (2/3) ... [2020-10-25 22:04:58,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb049ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:04:58, skipping insertion in model container [2020-10-25 22:04:58,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:58" (3/3) ... [2020-10-25 22:04:58,182 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2020-10-25 22:04:58,194 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:04:58,199 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:04:58,209 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:04:58,237 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:04:58,237 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:04:58,237 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:04:58,237 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:04:58,237 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:04:58,238 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:04:58,238 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:04:58,238 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:04:58,253 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-25 22:04:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-25 22:04:58,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:58,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-25 22:04:58,259 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 889629865, now seen corresponding path program 1 times [2020-10-25 22:04:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:04:58,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140327902] [2020-10-25 22:04:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:04:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:04:58,513 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 22:04:58,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140327902] [2020-10-25 22:04:58,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:04:58,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-25 22:04:58,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135301130] [2020-10-25 22:04:58,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-25 22:04:58,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:04:58,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-25 22:04:58,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-25 22:04:58,538 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-10-25 22:04:58,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:04:58,564 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-10-25 22:04:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-25 22:04:58,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-10-25 22:04:58,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:04:58,576 INFO L225 Difference]: With dead ends: 19 [2020-10-25 22:04:58,576 INFO L226 Difference]: Without dead ends: 8 [2020-10-25 22:04:58,579 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 22:04:58,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-25 22:04:58,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-25 22:04:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-25 22:04:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2020-10-25 22:04:58,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 6 [2020-10-25 22:04:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:04:58,615 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2020-10-25 22:04:58,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-25 22:04:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2020-10-25 22:04:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:04:58,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:04:58,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:04:58,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:04:58,616 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:04:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:04:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1804905802, now seen corresponding path program 1 times [2020-10-25 22:04:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:04:58,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426514970] [2020-10-25 22:04:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:04:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:58,782 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:58,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:04:58,878 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:04:58,907 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:04:58,907 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:04:58,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:04:58,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:04:58 BoogieIcfgContainer [2020-10-25 22:04:58,956 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:04:58,958 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:04:58,959 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:04:58,959 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:04:58,960 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:04:58" (3/4) ... [2020-10-25 22:04:58,962 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:04:59,050 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:04:59,050 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:04:59,053 INFO L168 Benchmark]: Toolchain (without parser) took 1759.42 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 21.1 MB in the beginning and 36.6 MB in the end (delta: -15.5 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:59,054 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 44.0 MB. Free memory was 29.0 MB in the beginning and 29.0 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:59,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.46 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 22.2 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:59,056 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.59 ms. Allocated memory is still 44.0 MB. Free memory was 22.1 MB in the beginning and 20.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:59,056 INFO L168 Benchmark]: Boogie Preprocessor took 25.08 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 19.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:04:59,057 INFO L168 Benchmark]: RCFGBuilder took 495.43 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.3 MB in the beginning and 31.9 MB in the end (delta: -12.6 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:59,061 INFO L168 Benchmark]: TraceAbstraction took 781.92 ms. Allocated memory is still 54.5 MB. Free memory was 31.4 MB in the beginning and 23.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:59,065 INFO L168 Benchmark]: Witness Printer took 92.12 ms. Allocated memory is still 54.5 MB. Free memory was 23.3 MB in the beginning and 36.6 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:04:59,071 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 44.0 MB. Free memory was 29.0 MB in the beginning and 29.0 MB in the end (delta: 40.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 307.46 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 22.2 MB in the end (delta: -1.7 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.59 ms. Allocated memory is still 44.0 MB. Free memory was 22.1 MB in the beginning and 20.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.08 ms. Allocated memory is still 44.0 MB. Free memory was 20.5 MB in the beginning and 19.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 495.43 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 19.3 MB in the beginning and 31.9 MB in the end (delta: -12.6 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 781.92 ms. Allocated memory is still 54.5 MB. Free memory was 31.4 MB in the beginning and 23.3 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Witness Printer took 92.12 ms. Allocated memory is still 54.5 MB. Free memory was 23.3 MB in the beginning and 36.6 MB in the end (delta: -13.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int a, b; [L24] int *p1, *p2; [L26] p1 = &a [L27] p2 = &b [L29] b = 1 [L30] a = 5 [L32] EXPR \read(a) [L32] a-- [L34] EXPR \read(a) [L14] COND TRUE a == 4 [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 [L16] return 1; [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) [L36] COND TRUE *p1 == 0 [L3] __assert_fail("0", "test06.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 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: 9 SDtfs, 8 SDslu, 1 SDs, 0 SdLazy, 1 SolverSat, 0 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=12occurred 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, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 35 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 proved your program to be incorrect! Received shutdown request...