./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/trex02-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/loops/trex02-2.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 79d989fa07a5ca9fba756b11f85a2a447254705c ........................................................................................................................................................................................................................................................................ 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 0.1.25-9a8b2e8 [2020-10-20 00:55:58,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:58,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:58,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:58,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:58,997 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:59,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:59,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:59,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:59,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:59,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:59,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:59,013 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:59,017 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:59,018 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:59,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:59,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:59,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:59,026 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:59,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:59,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:59,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:59,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:59,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:59,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:59,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:59,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:59,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:59,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:59,066 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:59,066 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:59,067 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:59,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:59,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:59,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:59,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:59,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:59,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:59,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:59,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:59,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:59,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:59,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:59,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:59,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:59,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:59,125 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:59,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:59,125 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:59,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:59,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:59,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:59,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:59,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:59,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:59,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:59,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:59,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:59,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:59,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:59,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:59,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:59,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:59,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:59,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:59,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:59,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:59,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:59,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:59,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:59,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:59,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 79d989fa07a5ca9fba756b11f85a2a447254705c [2020-10-20 00:55:59,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:59,379 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:59,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:59,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:59,385 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:59,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/trex02-2.c [2020-10-20 00:55:59,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e122949/3092691ecc5446a8b1c070cf8880ac37/FLAG7322eabfe [2020-10-20 00:55:59,874 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:59,875 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/trex02-2.c [2020-10-20 00:55:59,881 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e122949/3092691ecc5446a8b1c070cf8880ac37/FLAG7322eabfe [2020-10-20 00:56:00,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55e122949/3092691ecc5446a8b1c070cf8880ac37 [2020-10-20 00:56:00,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:56:00,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:56:00,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:56:00,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:56:00,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:56:00,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74434192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00, skipping insertion in model container [2020-10-20 00:56:00,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:56:00,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:56:00,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:56:00,667 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:56:00,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:56:00,714 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:56:00,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00 WrapperNode [2020-10-20 00:56:00,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:56:00,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:56:00,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:56:00,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:56:00,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:56:00,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:56:00,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:56:00,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:56:00,776 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,779 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,779 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,798 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (1/1) ... [2020-10-20 00:56:00,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:56:00,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:56:00,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:56:00,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:56:00,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (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 [2020-10-20 00:56:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:56:00,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:56:00,882 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:56:00,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:56:01,100 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:56:01,100 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-20 00:56:01,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:56:01 BoogieIcfgContainer [2020-10-20 00:56:01,102 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:56:01,103 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:56:01,103 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:56:01,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:56:01,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:56:00" (1/3) ... [2020-10-20 00:56:01,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46db1b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:56:01, skipping insertion in model container [2020-10-20 00:56:01,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:56:00" (2/3) ... [2020-10-20 00:56:01,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46db1b7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:56:01, skipping insertion in model container [2020-10-20 00:56:01,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:56:01" (3/3) ... [2020-10-20 00:56:01,111 INFO L111 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-10-20 00:56:01,123 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:56:01,130 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:56:01,145 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:56:01,171 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:56:01,171 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:56:01,171 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:56:01,172 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:56:01,173 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:56:01,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:56:01,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:56:01,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:56:01,191 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-10-20 00:56:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:56:01,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:01,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:56:01,198 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2020-10-20 00:56:01,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:01,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613903753] [2020-10-20 00:56:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:56:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:56:01,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613903753] [2020-10-20 00:56:01,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:56:01,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:56:01,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49955606] [2020-10-20 00:56:01,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:56:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:56:01,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:56:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:56:01,393 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2020-10-20 00:56:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:56:01,414 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-10-20 00:56:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:56:01,416 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-10-20 00:56:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:56:01,427 INFO L225 Difference]: With dead ends: 19 [2020-10-20 00:56:01,428 INFO L226 Difference]: Without dead ends: 8 [2020-10-20 00:56:01,432 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 [2020-10-20 00:56:01,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-10-20 00:56:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-10-20 00:56:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 00:56:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-10-20 00:56:01,476 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-10-20 00:56:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:56:01,477 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-10-20 00:56:01,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:56:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-10-20 00:56:01,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-20 00:56:01,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:56:01,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-20 00:56:01,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:56:01,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:56:01,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:56:01,480 INFO L82 PathProgramCache]: Analyzing trace with hash 889641779, now seen corresponding path program 1 times [2020-10-20 00:56:01,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:56:01,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374310553] [2020-10-20 00:56:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:56:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:56:01,514 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:56:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:56:01,532 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:56:01,558 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:56:01,559 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:56:01,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:56:01,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:56:01 BoogieIcfgContainer [2020-10-20 00:56:01,595 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:56:01,595 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:56:01,595 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:56:01,596 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:56:01,596 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:56:01" (3/4) ... [2020-10-20 00:56:01,599 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:56:01,649 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:56:01,649 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:56:01,653 INFO L168 Benchmark]: Toolchain (without parser) took 1370.43 ms. Allocated memory was 35.7 MB in the beginning and 45.1 MB in the end (delta: 9.4 MB). Free memory was 8.8 MB in the beginning and 12.3 MB in the end (delta: -3.5 MB). Peak memory consumption was 5.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,654 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 35.1 MB. Free memory was 14.1 MB in the beginning and 14.0 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,655 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.43 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 7.9 MB in the beginning and 26.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 6.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,656 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.41 ms. Allocated memory is still 44.0 MB. Free memory was 26.5 MB in the beginning and 25.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,657 INFO L168 Benchmark]: Boogie Preprocessor took 40.46 ms. Allocated memory is still 44.0 MB. Free memory was 25.0 MB in the beginning and 23.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,658 INFO L168 Benchmark]: RCFGBuilder took 296.41 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 23.7 MB in the beginning and 22.9 MB in the end (delta: 760.7 kB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,658 INFO L168 Benchmark]: TraceAbstraction took 491.59 ms. Allocated memory is still 45.1 MB. Free memory was 22.5 MB in the beginning and 14.3 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,659 INFO L168 Benchmark]: Witness Printer took 54.31 ms. Allocated memory is still 45.1 MB. Free memory was 14.1 MB in the beginning and 12.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:56:01,664 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 35.1 MB. Free memory was 14.1 MB in the beginning and 14.0 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 429.43 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 7.9 MB in the beginning and 26.7 MB in the end (delta: -18.8 MB). Peak memory consumption was 6.0 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 46.41 ms. Allocated memory is still 44.0 MB. Free memory was 26.5 MB in the beginning and 25.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 40.46 ms. Allocated memory is still 44.0 MB. Free memory was 25.0 MB in the beginning and 23.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 296.41 ms. Allocated memory was 44.0 MB in the beginning and 45.1 MB in the end (delta: 1.0 MB). Free memory was 23.7 MB in the beginning and 22.9 MB in the end (delta: 760.7 kB). Peak memory consumption was 11.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 491.59 ms. Allocated memory is still 45.1 MB. Free memory was 22.5 MB in the beginning and 14.3 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. * Witness Printer took 54.31 ms. Allocated memory is still 45.1 MB. Free memory was 14.1 MB in the beginning and 12.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 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: [L15] int x; VAL [x=0] [L22] x=__VERIFIER_nondet_int() [L23] COND FALSE !(x > 0) VAL [x=-1] [L6] COND TRUE !(cond) VAL [x=-1] [L3] __assert_fail("0", "trex02-2.c", 3, "reach_error") VAL [x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 12 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=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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 25 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...