./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s3iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4d5612c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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/array-fpi/s3iff.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 c931059f8de62343b75e0a40b805bb4dbf7de2b8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-f4d5612 [2019-11-28 12:26:57,224 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 12:26:57,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 12:26:57,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 12:26:57,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 12:26:57,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 12:26:57,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 12:26:57,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 12:26:57,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 12:26:57,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 12:26:57,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 12:26:57,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 12:26:57,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 12:26:57,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 12:26:57,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 12:26:57,281 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 12:26:57,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 12:26:57,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 12:26:57,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 12:26:57,292 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 12:26:57,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 12:26:57,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 12:26:57,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 12:26:57,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 12:26:57,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 12:26:57,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 12:26:57,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 12:26:57,309 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 12:26:57,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 12:26:57,311 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 12:26:57,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 12:26:57,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 12:26:57,312 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 12:26:57,313 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 12:26:57,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 12:26:57,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 12:26:57,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 12:26:57,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 12:26:57,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 12:26:57,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 12:26:57,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 12:26:57,319 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 12:26:57,336 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 12:26:57,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 12:26:57,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 12:26:57,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 12:26:57,338 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 12:26:57,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 12:26:57,339 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 12:26:57,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 12:26:57,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 12:26:57,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 12:26:57,340 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 12:26:57,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 12:26:57,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 12:26:57,341 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 12:26:57,341 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 12:26:57,341 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 12:26:57,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 12:26:57,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 12:26:57,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 12:26:57,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 12:26:57,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 12:26:57,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 12:26:57,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 12:26:57,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 12:26:57,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 12:26:57,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 12:26:57,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 12:26:57,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 12:26:57,345 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 -> c931059f8de62343b75e0a40b805bb4dbf7de2b8 [2019-11-28 12:26:57,641 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 12:26:57,662 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 12:26:57,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 12:26:57,669 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 12:26:57,669 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 12:26:57,671 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s3iff.c [2019-11-28 12:26:57,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a474bffbb/1c27c43fbf0448dc9f7438e9ee9df9f9/FLAG52c9350e3 [2019-11-28 12:26:58,211 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 12:26:58,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s3iff.c [2019-11-28 12:26:58,219 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a474bffbb/1c27c43fbf0448dc9f7438e9ee9df9f9/FLAG52c9350e3 [2019-11-28 12:26:58,567 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a474bffbb/1c27c43fbf0448dc9f7438e9ee9df9f9 [2019-11-28 12:26:58,571 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 12:26:58,573 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 12:26:58,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 12:26:58,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 12:26:58,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 12:26:58,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79299060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58, skipping insertion in model container [2019-11-28 12:26:58,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 12:26:58,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 12:26:58,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 12:26:58,797 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 12:26:58,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 12:26:58,835 INFO L208 MainTranslator]: Completed translation [2019-11-28 12:26:58,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58 WrapperNode [2019-11-28 12:26:58,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 12:26:58,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 12:26:58,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 12:26:58,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 12:26:58,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,957 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 12:26:58,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 12:26:58,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 12:26:58,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 12:26:58,970 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (1/1) ... [2019-11-28 12:26:58,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 12:26:58,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 12:26:58,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 12:26:58,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 12:26:58,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (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 [2019-11-28 12:26:59,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 12:26:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 12:26:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 12:26:59,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 12:26:59,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 12:26:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 12:26:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 12:26:59,285 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 12:26:59,285 INFO L287 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-28 12:26:59,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:26:59 BoogieIcfgContainer [2019-11-28 12:26:59,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 12:26:59,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 12:26:59,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 12:26:59,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 12:26:59,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:26:58" (1/3) ... [2019-11-28 12:26:59,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592646e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:26:59, skipping insertion in model container [2019-11-28 12:26:59,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:26:58" (2/3) ... [2019-11-28 12:26:59,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@592646e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:26:59, skipping insertion in model container [2019-11-28 12:26:59,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:26:59" (3/3) ... [2019-11-28 12:26:59,295 INFO L109 eAbstractionObserver]: Analyzing ICFG s3iff.c [2019-11-28 12:26:59,305 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 12:26:59,313 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 12:26:59,326 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 12:26:59,354 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 12:26:59,355 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 12:26:59,355 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 12:26:59,355 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 12:26:59,356 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 12:26:59,356 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 12:26:59,356 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 12:26:59,356 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 12:26:59,380 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-28 12:26:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 12:26:59,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 12:26:59,391 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 12:26:59,392 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 12:26:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 12:26:59,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1476218026, now seen corresponding path program 1 times [2019-11-28 12:26:59,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 12:26:59,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848575973] [2019-11-28 12:26:59,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 12:26:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 12:26:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:26:59,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848575973] [2019-11-28 12:26:59,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 12:26:59,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 12:26:59,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336856483] [2019-11-28 12:26:59,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 12:26:59,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 12:26:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 12:26:59,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 12:26:59,577 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2019-11-28 12:26:59,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 12:26:59,591 INFO L93 Difference]: Finished difference Result 29 states and 38 transitions. [2019-11-28 12:26:59,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 12:26:59,592 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-28 12:26:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 12:26:59,600 INFO L225 Difference]: With dead ends: 29 [2019-11-28 12:26:59,601 INFO L226 Difference]: Without dead ends: 13 [2019-11-28 12:26:59,604 INFO L630 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 [2019-11-28 12:26:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-28 12:26:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-28 12:26:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-28 12:26:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-28 12:26:59,635 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 9 [2019-11-28 12:26:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 12:26:59,636 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-28 12:26:59,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 12:26:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-28 12:26:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 12:26:59,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 12:26:59,638 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 12:26:59,638 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 12:26:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 12:26:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1304115419, now seen corresponding path program 1 times [2019-11-28 12:26:59,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 12:26:59,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866726920] [2019-11-28 12:26:59,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 12:26:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 12:26:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:26:59,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866726920] [2019-11-28 12:26:59,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 12:26:59,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 12:26:59,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320968219] [2019-11-28 12:26:59,715 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 12:26:59,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 12:26:59,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 12:26:59,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 12:26:59,716 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2019-11-28 12:26:59,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 12:26:59,772 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-11-28 12:26:59,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 12:26:59,773 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-28 12:26:59,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 12:26:59,774 INFO L225 Difference]: With dead ends: 23 [2019-11-28 12:26:59,774 INFO L226 Difference]: Without dead ends: 15 [2019-11-28 12:26:59,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 12:26:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-28 12:26:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-11-28 12:26:59,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 12:26:59,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-11-28 12:26:59,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2019-11-28 12:26:59,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 12:26:59,781 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-11-28 12:26:59,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 12:26:59,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-11-28 12:26:59,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 12:26:59,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 12:26:59,783 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 12:26:59,783 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 12:26:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 12:26:59,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1358761923, now seen corresponding path program 1 times [2019-11-28 12:26:59,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 12:26:59,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403274624] [2019-11-28 12:26:59,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 12:26:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 12:26:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 12:26:59,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403274624] [2019-11-28 12:26:59,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 12:26:59,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 12:26:59,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734351168] [2019-11-28 12:26:59,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 12:26:59,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 12:26:59,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 12:26:59,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 12:26:59,882 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 4 states. [2019-11-28 12:26:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 12:26:59,935 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2019-11-28 12:26:59,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 12:26:59,936 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-28 12:26:59,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 12:26:59,937 INFO L225 Difference]: With dead ends: 22 [2019-11-28 12:26:59,937 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 12:26:59,938 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-28 12:26:59,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 12:26:59,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2019-11-28 12:26:59,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 12:26:59,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-28 12:26:59,942 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2019-11-28 12:26:59,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 12:26:59,943 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-28 12:26:59,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 12:26:59,943 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-28 12:26:59,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 12:26:59,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 12:26:59,944 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 12:26:59,945 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 12:26:59,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 12:26:59,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1565637502, now seen corresponding path program 1 times [2019-11-28 12:26:59,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 12:26:59,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005326261] [2019-11-28 12:26:59,946 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 12:26:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 12:27:00,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:27:00,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005326261] [2019-11-28 12:27:00,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176998346] [2019-11-28 12:27:00,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 12:27:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 12:27:00,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 12:27:00,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 12:27:00,540 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-28 12:27:00,541 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 12:27:00,561 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 12:27:00,576 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 12:27:00,576 INFO L508 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-28 12:27:00,591 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 12:27:00,592 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 12:27:00,592 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-28 12:27:00,637 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2019-11-28 12:27:00,638 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 12:27:00,656 INFO L588 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 12:27:00,656 INFO L508 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 12:27:00,657 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-28 12:27:00,902 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 12:27:00,902 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2019-11-28 12:27:00,904 INFO L508 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 12:27:00,939 INFO L588 ElimStorePlain]: treesize reduction 24, result has 69.6 percent of original size [2019-11-28 12:27:00,941 INFO L508 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-28 12:27:00,942 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:70, output treesize:55 [2019-11-28 12:27:01,004 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 12:27:01,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:27:01,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 12:27:01,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-11-28 12:27:01,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831919115] [2019-11-28 12:27:01,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 12:27:01,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 12:27:01,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 12:27:01,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-11-28 12:27:01,045 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 18 states. [2019-11-28 12:27:01,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 12:27:01,720 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-28 12:27:01,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 12:27:01,721 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-28 12:27:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 12:27:01,723 INFO L225 Difference]: With dead ends: 33 [2019-11-28 12:27:01,724 INFO L226 Difference]: Without dead ends: 24 [2019-11-28 12:27:01,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2019-11-28 12:27:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-28 12:27:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-28 12:27:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-28 12:27:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-11-28 12:27:01,736 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2019-11-28 12:27:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 12:27:01,736 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-11-28 12:27:01,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 12:27:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-11-28 12:27:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 12:27:01,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 12:27:01,738 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 12:27:01,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 12:27:01,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 12:27:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 12:27:01,944 INFO L82 PathProgramCache]: Analyzing trace with hash -472130976, now seen corresponding path program 2 times [2019-11-28 12:27:01,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 12:27:01,945 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143486282] [2019-11-28 12:27:01,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 12:27:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 12:27:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:27:02,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143486282] [2019-11-28 12:27:02,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481959419] [2019-11-28 12:27:02,050 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 12:27:02,089 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 12:27:02,090 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 12:27:02,091 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 12:27:02,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 12:27:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:27:02,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 12:27:02,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-28 12:27:02,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120324329] [2019-11-28 12:27:02,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 12:27:02,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 12:27:02,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 12:27:02,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 12:27:02,136 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 10 states. [2019-11-28 12:27:02,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 12:27:02,287 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-11-28 12:27:02,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 12:27:02,288 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2019-11-28 12:27:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 12:27:02,289 INFO L225 Difference]: With dead ends: 31 [2019-11-28 12:27:02,289 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 12:27:02,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-11-28 12:27:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 12:27:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2019-11-28 12:27:02,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 12:27:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-28 12:27:02,296 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2019-11-28 12:27:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 12:27:02,297 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-28 12:27:02,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 12:27:02,297 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-28 12:27:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 12:27:02,298 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 12:27:02,299 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 12:27:02,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 12:27:02,500 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 12:27:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 12:27:02,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1317941731, now seen corresponding path program 3 times [2019-11-28 12:27:02,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 12:27:02,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172357840] [2019-11-28 12:27:02,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 12:27:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 12:27:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:27:02,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172357840] [2019-11-28 12:27:02,590 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679621282] [2019-11-28 12:27:02,590 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 12:27:02,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-28 12:27:02,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 12:27:02,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 12:27:02,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 12:27:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 12:27:02,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 12:27:02,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-28 12:27:02,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846870552] [2019-11-28 12:27:02,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 12:27:02,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 12:27:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 12:27:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-28 12:27:02,689 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2019-11-28 12:27:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 12:27:02,804 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-28 12:27:02,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 12:27:02,806 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-28 12:27:02,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 12:27:02,807 INFO L225 Difference]: With dead ends: 35 [2019-11-28 12:27:02,808 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 12:27:02,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-28 12:27:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 12:27:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-11-28 12:27:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 12:27:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-11-28 12:27:02,815 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 17 [2019-11-28 12:27:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 12:27:02,816 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-11-28 12:27:02,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 12:27:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-11-28 12:27:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-28 12:27:02,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 12:27:02,817 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 12:27:03,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 12:27:03,018 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 12:27:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 12:27:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1991965825, now seen corresponding path program 4 times [2019-11-28 12:27:03,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 12:27:03,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523518098] [2019-11-28 12:27:03,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 12:27:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 12:27:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 12:27:03,117 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 12:27:03,118 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 12:27:03,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:27:03 BoogieIcfgContainer [2019-11-28 12:27:03,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 12:27:03,170 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 12:27:03,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 12:27:03,171 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 12:27:03,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:26:59" (3/4) ... [2019-11-28 12:27:03,175 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 12:27:03,233 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 12:27:03,233 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 12:27:03,235 INFO L168 Benchmark]: Toolchain (without parser) took 4662.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.2 MB). Free memory was 956.3 MB in the beginning and 1.2 GB in the end (delta: -241.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 12:27:03,236 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 12:27:03,237 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.94 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 12:27:03,237 INFO L168 Benchmark]: Boogie Procedure Inliner took 120.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -196.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 12:27:03,238 INFO L168 Benchmark]: Boogie Preprocessor took 37.81 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 12:27:03,239 INFO L168 Benchmark]: RCFGBuilder took 291.12 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: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. [2019-11-28 12:27:03,240 INFO L168 Benchmark]: TraceAbstraction took 3882.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -87.0 MB). Peak memory consumption was 307.0 MB. Max. memory is 11.5 GB. [2019-11-28 12:27:03,240 INFO L168 Benchmark]: Witness Printer took 63.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. [2019-11-28 12:27:03,245 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 259.94 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 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 120.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -196.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.81 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 291.12 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: 19.6 MB). Peak memory consumption was 19.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3882.28 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -87.0 MB). Peak memory consumption was 307.0 MB. Max. memory is 11.5 GB. * Witness Printer took 63.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; VAL [N=0] [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] sum[0] = 1 [L27] i=0 VAL [N=2] [L27] COND TRUE i