./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/trex02-2.c --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 59f6b3c0f7e8d2484e4b4c0024f7066a0853dc90 ......................................................................................................................................................................................................................................................................................................................... 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 0.1.25-8bd4bc6 [2020-07-28 18:12:36,481 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 18:12:36,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 18:12:36,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 18:12:36,503 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 18:12:36,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 18:12:36,509 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 18:12:36,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 18:12:36,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 18:12:36,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 18:12:36,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 18:12:36,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 18:12:36,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 18:12:36,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 18:12:36,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 18:12:36,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 18:12:36,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 18:12:36,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 18:12:36,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 18:12:36,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 18:12:36,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 18:12:36,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 18:12:36,552 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 18:12:36,553 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 18:12:36,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 18:12:36,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 18:12:36,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 18:12:36,557 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 18:12:36,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 18:12:36,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 18:12:36,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 18:12:36,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 18:12:36,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 18:12:36,562 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 18:12:36,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 18:12:36,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 18:12:36,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 18:12:36,564 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 18:12:36,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 18:12:36,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 18:12:36,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 18:12:36,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 18:12:36,605 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 18:12:36,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 18:12:36,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 18:12:36,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 18:12:36,608 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 18:12:36,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 18:12:36,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 18:12:36,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 18:12:36,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 18:12:36,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 18:12:36,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 18:12:36,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 18:12:36,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 18:12:36,612 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 18:12:36,613 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 18:12:36,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 18:12:36,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 18:12:36,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 18:12:36,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 18:12:36,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 18:12:36,614 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 18:12:36,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 18:12:36,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 18:12:36,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 18:12:36,615 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 18:12:36,615 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 18:12:36,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 18:12:36,616 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 18:12:36,616 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 18:12:36,616 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(__VERIFIER_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 -> 59f6b3c0f7e8d2484e4b4c0024f7066a0853dc90 [2020-07-28 18:12:36,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 18:12:36,928 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 18:12:36,932 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 18:12:36,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 18:12:36,934 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 18:12:36,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/trex02-2.c [2020-07-28 18:12:36,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/057676d9f/6af8df936ea24d4993e28ba88459781f/FLAGc70fd883d [2020-07-28 18:12:37,447 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 18:12:37,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/trex02-2.c [2020-07-28 18:12:37,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/057676d9f/6af8df936ea24d4993e28ba88459781f/FLAGc70fd883d [2020-07-28 18:12:37,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/057676d9f/6af8df936ea24d4993e28ba88459781f [2020-07-28 18:12:37,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 18:12:37,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 18:12:37,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 18:12:37,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 18:12:37,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 18:12:37,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:12:37" (1/1) ... [2020-07-28 18:12:37,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@481def88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:37, skipping insertion in model container [2020-07-28 18:12:37,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 06:12:37" (1/1) ... [2020-07-28 18:12:37,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 18:12:37,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 18:12:38,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:12:38,120 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 18:12:38,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 18:12:38,152 INFO L208 MainTranslator]: Completed translation [2020-07-28 18:12:38,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38 WrapperNode [2020-07-28 18:12:38,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 18:12:38,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 18:12:38,154 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 18:12:38,154 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 18:12:38,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,168 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,242 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 18:12:38,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 18:12:38,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 18:12:38,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 18:12:38,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,253 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (1/1) ... [2020-07-28 18:12:38,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 18:12:38,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 18:12:38,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 18:12:38,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 18:12:38,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (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 [2020-07-28 18:12:38,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 18:12:38,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 18:12:38,571 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 18:12:38,572 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-28 18:12:38,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:12:38 BoogieIcfgContainer [2020-07-28 18:12:38,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 18:12:38,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 18:12:38,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 18:12:38,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 18:12:38,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 06:12:37" (1/3) ... [2020-07-28 18:12:38,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291f559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:12:38, skipping insertion in model container [2020-07-28 18:12:38,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 06:12:38" (2/3) ... [2020-07-28 18:12:38,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291f559 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 06:12:38, skipping insertion in model container [2020-07-28 18:12:38,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:12:38" (3/3) ... [2020-07-28 18:12:38,587 INFO L109 eAbstractionObserver]: Analyzing ICFG trex02-2.c [2020-07-28 18:12:38,598 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 18:12:38,608 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 18:12:38,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 18:12:38,658 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 18:12:38,658 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 18:12:38,658 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 18:12:38,658 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 18:12:38,659 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 18:12:38,659 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 18:12:38,659 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 18:12:38,659 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 18:12:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-07-28 18:12:38,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-28 18:12:38,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:12:38,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-28 18:12:38,697 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:12:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:12:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash 889999271, now seen corresponding path program 1 times [2020-07-28 18:12:38,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:12:38,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645846004] [2020-07-28 18:12:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:12:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-28 18:12:38,873 INFO L280 TraceCheckUtils]: 0: Hoare triple {14#true} ~x~0 := 0; {14#true} is VALID [2020-07-28 18:12:38,874 INFO L280 TraceCheckUtils]: 1: Hoare triple {14#true} havoc main_#res;havoc main_#t~nondet1, main_#t~nondet2, main_~c~0;assume -2147483648 <= main_#t~nondet1 && main_#t~nondet1 <= 2147483647;~x~0 := main_#t~nondet1;havoc main_#t~nondet1; {14#true} is VALID [2020-07-28 18:12:38,876 INFO L280 TraceCheckUtils]: 2: Hoare triple {14#true} assume !true; {15#false} is VALID [2020-07-28 18:12:38,876 INFO L280 TraceCheckUtils]: 3: Hoare triple {15#false} __VERIFIER_assert_#in~cond := (if 0 == ~x~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; {15#false} is VALID [2020-07-28 18:12:38,877 INFO L280 TraceCheckUtils]: 4: Hoare triple {15#false} assume 0 == __VERIFIER_assert_~cond; {15#false} is VALID [2020-07-28 18:12:38,877 INFO L280 TraceCheckUtils]: 5: Hoare triple {15#false} assume !false; {15#false} is VALID [2020-07-28 18:12:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-28 18:12:38,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645846004] [2020-07-28 18:12:38,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-28 18:12:38,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-28 18:12:38,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128237394] [2020-07-28 18:12:38,891 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-07-28 18:12:38,894 INFO L84 Accepts]: Finished accepts. word is accepted. [2020-07-28 18:12:38,899 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states. [2020-07-28 18:12:38,936 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 6 edges. 6 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:12:38,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-28 18:12:38,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-28 18:12:38,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-28 18:12:38,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-28 18:12:38,950 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2020-07-28 18:12:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:12:38,990 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2020-07-28 18:12:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-28 18:12:38,990 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-07-28 18:12:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-28 18:12:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 18:12:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 21 transitions. [2020-07-28 18:12:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-07-28 18:12:39,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 21 transitions. [2020-07-28 18:12:39,002 INFO L86 InductivityCheck]: Starting indutivity check of a Floyd-Hoare automaton with 2 states and 21 transitions. [2020-07-28 18:12:39,038 INFO L119 InductivityCheck]: Floyd-Hoare automaton has 21 edges. 21 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. [2020-07-28 18:12:39,050 INFO L225 Difference]: With dead ends: 18 [2020-07-28 18:12:39,050 INFO L226 Difference]: Without dead ends: 8 [2020-07-28 18:12:39,054 INFO L675 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 [2020-07-28 18:12:39,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-07-28 18:12:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-07-28 18:12:39,084 INFO L214 AbstractMinimizeNwa]: Start testing correctness of minimizeSevpa [2020-07-28 18:12:39,085 INFO L82 GeneralOperation]: Start isEquivalent. First operand 8 states. Second operand 8 states. [2020-07-28 18:12:39,085 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 18:12:39,085 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 18:12:39,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:12:39,088 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-07-28 18:12:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-07-28 18:12:39,088 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:12:39,089 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:12:39,089 INFO L74 IsIncluded]: Start isIncluded. First operand 8 states. Second operand 8 states. [2020-07-28 18:12:39,089 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 8 states. [2020-07-28 18:12:39,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-28 18:12:39,092 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-07-28 18:12:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-07-28 18:12:39,093 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-28 18:12:39,093 INFO L83 IsIncluded]: Finished isIncluded. Language is included [2020-07-28 18:12:39,093 INFO L88 GeneralOperation]: Finished isEquivalent. [2020-07-28 18:12:39,094 INFO L221 AbstractMinimizeNwa]: Finished testing correctness of minimizeSevpa [2020-07-28 18:12:39,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-07-28 18:12:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-07-28 18:12:39,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-07-28 18:12:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-28 18:12:39,099 INFO L479 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-07-28 18:12:39,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-28 18:12:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-07-28 18:12:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-07-28 18:12:39,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 18:12:39,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-07-28 18:12:39,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 18:12:39,101 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 18:12:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 18:12:39,101 INFO L82 PathProgramCache]: Analyzing trace with hash 889641779, now seen corresponding path program 1 times [2020-07-28 18:12:39,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 18:12:39,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922006940] [2020-07-28 18:12:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 18:12:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 18:12:39,132 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 18:12:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 18:12:39,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 18:12:39,158 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-28 18:12:39,158 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 18:12:39,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-28 18:12:39,180 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 18:12:39,180 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-28 18:12:39,180 WARN L170 areAnnotationChecker]: L15-1 has no Hoare annotation [2020-07-28 18:12:39,181 WARN L170 areAnnotationChecker]: L15-1 has no Hoare annotation [2020-07-28 18:12:39,181 WARN L170 areAnnotationChecker]: L15-1 has no Hoare annotation [2020-07-28 18:12:39,181 WARN L170 areAnnotationChecker]: L21-2 has no Hoare annotation [2020-07-28 18:12:39,181 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-28 18:12:39,181 WARN L170 areAnnotationChecker]: L23 has no Hoare annotation [2020-07-28 18:12:39,181 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-28 18:12:39,181 WARN L170 areAnnotationChecker]: L4 has no Hoare annotation [2020-07-28 18:12:39,182 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-28 18:12:39,182 WARN L170 areAnnotationChecker]: L5 has no Hoare annotation [2020-07-28 18:12:39,182 WARN L170 areAnnotationChecker]: L4-2 has no Hoare annotation [2020-07-28 18:12:39,182 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 18:12:39,182 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 18:12:39,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 06:12:39 BoogieIcfgContainer [2020-07-28 18:12:39,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 18:12:39,185 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 18:12:39,185 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 18:12:39,186 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 18:12:39,186 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 06:12:38" (3/4) ... [2020-07-28 18:12:39,189 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-07-28 18:12:39,236 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 18:12:39,236 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 18:12:39,240 INFO L168 Benchmark]: Toolchain (without parser) took 1345.01 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 956.2 MB in the beginning and 1.1 GB in the end (delta: -130.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2020-07-28 18:12:39,241 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:12:39,241 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.49 ms. Allocated memory is still 1.0 GB. Free memory was 956.2 MB in the beginning and 945.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 18:12:39,242 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 945.5 MB in the beginning and 1.1 GB in the end (delta: -198.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-07-28 18:12:39,243 INFO L168 Benchmark]: Boogie Preprocessor took 21.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 18:12:39,244 INFO L168 Benchmark]: RCFGBuilder took 311.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2020-07-28 18:12:39,244 INFO L168 Benchmark]: TraceAbstraction took 608.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 11.5 GB. [2020-07-28 18:12:39,245 INFO L168 Benchmark]: Witness Printer took 51.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2020-07-28 18:12:39,250 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 256.49 ms. Allocated memory is still 1.0 GB. Free memory was 956.2 MB in the beginning and 945.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 88.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 945.5 MB in the beginning and 1.1 GB in the end (delta: -198.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.76 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 311.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 608.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 26.1 MB). Peak memory consumption was 26.1 MB. Max. memory is 11.5 GB. * Witness Printer took 51.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] int x; VAL [x=0] [L20] x=__VERIFIER_nondet_int() [L21] COND FALSE !(x > 0) VAL [x=-1] [L4] COND TRUE !(cond) VAL [x=-1] [L5] __VERIFIER_error() VAL [x=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, 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=11occurred 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...