./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/phases_2-1.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/loop-acceleration/phases_2-1.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 62c8372256c861b4f8257978673ab17e2a1f1b99 .......................................................................................................................................................................................................................................................................... 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 22:19:53,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:19:53,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:19:54,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:19:54,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:19:54,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:19:54,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:19:54,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:19:54,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:19:54,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:19:54,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:19:54,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:19:54,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:19:54,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:19:54,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:19:54,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:19:54,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:19:54,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:19:54,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:19:54,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:19:54,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:19:54,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:19:54,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:19:54,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:19:54,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:19:54,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:19:54,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:19:54,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:19:54,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:19:54,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:19:54,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:19:54,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:19:54,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:19:54,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:19:54,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:19:54,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:19:54,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:19:54,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:19:54,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:19:54,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:19:54,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:19:54,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:19:54,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:19:54,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:19:54,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:19:54,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:19:54,132 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:19:54,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:19:54,133 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:19:54,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:19:54,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:19:54,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:19:54,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:19:54,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:19:54,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:19:54,134 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:19:54,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:19:54,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:19:54,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:19:54,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:19:54,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:19:54,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:19:54,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:19:54,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:19:54,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:19:54,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:19:54,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:19:54,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:19:54,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:19:54,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:19:54,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:19:54,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c8372256c861b4f8257978673ab17e2a1f1b99 [2020-10-25 22:19:54,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:19:54,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:19:54,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:19:54,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:19:54,599 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:19:54,600 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_2-1.c [2020-10-25 22:19:54,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7d7f58f4/69da0ba03b3f4b38824813b8967ca39b/FLAGe3625af39 [2020-10-25 22:19:55,391 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:19:55,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_2-1.c [2020-10-25 22:19:55,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7d7f58f4/69da0ba03b3f4b38824813b8967ca39b/FLAGe3625af39 [2020-10-25 22:19:55,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7d7f58f4/69da0ba03b3f4b38824813b8967ca39b [2020-10-25 22:19:55,771 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:19:55,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:19:55,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:19:55,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:19:55,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:19:55,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:19:55" (1/1) ... [2020-10-25 22:19:55,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@517129c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:55, skipping insertion in model container [2020-10-25 22:19:55,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:19:55" (1/1) ... [2020-10-25 22:19:55,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:19:55,870 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:19:56,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:19:56,047 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:19:56,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:19:56,082 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:19:56,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56 WrapperNode [2020-10-25 22:19:56,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:19:56,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:19:56,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:19:56,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:19:56,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:19:56,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:19:56,123 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:19:56,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:19:56,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (1/1) ... [2020-10-25 22:19:56,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:19:56,148 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:19:56,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:19:56,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:19:56,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (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 22:19:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:19:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:19:56,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:19:56,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:19:56,513 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:19:56,513 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:19:56,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:56 BoogieIcfgContainer [2020-10-25 22:19:56,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:19:56,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:19:56,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:19:56,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:19:56,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:19:55" (1/3) ... [2020-10-25 22:19:56,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039937b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:19:56, skipping insertion in model container [2020-10-25 22:19:56,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:19:56" (2/3) ... [2020-10-25 22:19:56,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5039937b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:19:56, skipping insertion in model container [2020-10-25 22:19:56,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:56" (3/3) ... [2020-10-25 22:19:56,526 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2020-10-25 22:19:56,542 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:19:56,548 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:19:56,575 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:19:56,648 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:19:56,653 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:19:56,653 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:19:56,654 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:19:56,654 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:19:56,654 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:19:56,655 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:19:56,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:19:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-10-25 22:19:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:19:56,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:56,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:56,712 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:56,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:56,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1807274184, now seen corresponding path program 1 times [2020-10-25 22:19:56,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:56,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054795844] [2020-10-25 22:19:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:19:56,985 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 22:19:56,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054795844] [2020-10-25 22:19:56,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:19:56,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:19:56,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146873659] [2020-10-25 22:19:56,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:19:57,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:19:57,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:19:57,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:19:57,025 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-10-25 22:19:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:19:57,045 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-10-25 22:19:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:19:57,046 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-10-25 22:19:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:19:57,059 INFO L225 Difference]: With dead ends: 20 [2020-10-25 22:19:57,059 INFO L226 Difference]: Without dead ends: 9 [2020-10-25 22:19:57,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:19:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-10-25 22:19:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-10-25 22:19:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-25 22:19:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-10-25 22:19:57,120 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-10-25 22:19:57,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:19:57,120 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-10-25 22:19:57,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:19:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-10-25 22:19:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-10-25 22:19:57,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:19:57,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:19:57,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:19:57,123 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:19:57,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:19:57,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1806976274, now seen corresponding path program 1 times [2020-10-25 22:19:57,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:19:57,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743226608] [2020-10-25 22:19:57,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:19:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:19:57,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:19:57,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:19:57,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:19:57,292 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:19:57,292 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:19:57,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:19:57,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:19:57 BoogieIcfgContainer [2020-10-25 22:19:57,334 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:19:57,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:19:57,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:19:57,335 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:19:57,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:19:56" (3/4) ... [2020-10-25 22:19:57,339 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:19:57,389 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:19:57,390 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:19:57,392 INFO L168 Benchmark]: Toolchain (without parser) took 1617.86 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 18.2 MB in the beginning and 26.5 MB in the end (delta: -8.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:57,393 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 41.9 MB. Free memory was 27.2 MB in the beginning and 27.2 MB in the end (delta: 24.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:19:57,394 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.82 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.6 MB in the beginning and 25.7 MB in the end (delta: -8.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:57,395 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.85 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 24.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:57,396 INFO L168 Benchmark]: Boogie Preprocessor took 23.68 ms. Allocated memory is still 50.3 MB. Free memory was 24.3 MB in the beginning and 23.3 MB in the end (delta: 930.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:19:57,397 INFO L168 Benchmark]: RCFGBuilder took 367.79 ms. Allocated memory is still 50.3 MB. Free memory was 23.2 MB in the beginning and 24.5 MB in the end (delta: -1.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:57,398 INFO L168 Benchmark]: TraceAbstraction took 816.77 ms. Allocated memory is still 50.3 MB. Free memory was 24.0 MB in the beginning and 28.0 MB in the end (delta: -4.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:19:57,399 INFO L168 Benchmark]: Witness Printer took 54.97 ms. Allocated memory is still 50.3 MB. Free memory was 28.0 MB in the beginning and 26.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:19:57,403 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 41.9 MB. Free memory was 27.2 MB in the beginning and 27.2 MB in the end (delta: 24.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.82 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 17.6 MB in the beginning and 25.7 MB in the end (delta: -8.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.85 ms. Allocated memory is still 50.3 MB. Free memory was 25.7 MB in the beginning and 24.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.68 ms. Allocated memory is still 50.3 MB. Free memory was 24.3 MB in the beginning and 23.3 MB in the end (delta: 930.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 367.79 ms. Allocated memory is still 50.3 MB. Free memory was 23.2 MB in the beginning and 24.5 MB in the end (delta: -1.3 MB). Peak memory consumption was 4.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 816.77 ms. Allocated memory is still 50.3 MB. Free memory was 24.0 MB in the beginning and 28.0 MB in the end (delta: -4.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 54.97 ms. Allocated memory is still 50.3 MB. Free memory was 28.0 MB in the beginning and 26.5 MB in the end (delta: 1.6 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: [L18] unsigned int x = 1; [L19] unsigned int y = __VERIFIER_nondet_uint(); [L21] COND FALSE !(!(y > 0)) [L23] COND FALSE !(x < y) [L11] COND TRUE !(cond) [L3] __assert_fail("0", "phases_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 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: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 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...