./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c 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/loops/sum01-1.i -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 5cba8acfa381c990ec40e4bf9e5d202ee845a576 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-f470102 [2019-11-28 17:03:52,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:03:52,338 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:03:52,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:03:52,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:03:52,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:03:52,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:03:52,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:03:52,375 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:03:52,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:03:52,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:03:52,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:03:52,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:03:52,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:03:52,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:03:52,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:03:52,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:03:52,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:03:52,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:03:52,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:03:52,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:03:52,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:03:52,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:03:52,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:03:52,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:03:52,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:03:52,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:03:52,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:03:52,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:03:52,403 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:03:52,403 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:03:52,404 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:03:52,405 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:03:52,406 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:03:52,407 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:03:52,407 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:03:52,408 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:03:52,408 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:03:52,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:03:52,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:03:52,410 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:03:52,411 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:03:52,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:03:52,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:03:52,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:03:52,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:03:52,437 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:03:52,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:03:52,437 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:03:52,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:03:52,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:03:52,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:03:52,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:03:52,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:03:52,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:03:52,441 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:03:52,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:03:52,441 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:03:52,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:03:52,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:03:52,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:03:52,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:03:52,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:03:52,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:03:52,444 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:03:52,444 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:03:52,444 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:03:52,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:03:52,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:03:52,445 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:03:52,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:03:52,446 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 -> 5cba8acfa381c990ec40e4bf9e5d202ee845a576 [2019-11-28 17:03:52,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:03:52,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:03:52,759 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:03:52,761 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:03:52,761 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:03:52,762 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01-1.i [2019-11-28 17:03:52,824 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f3394ed/d1a7be23c08d41b7b69c5506d146264d/FLAG2e92a937b [2019-11-28 17:03:53,290 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:03:53,291 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i [2019-11-28 17:03:53,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f3394ed/d1a7be23c08d41b7b69c5506d146264d/FLAG2e92a937b [2019-11-28 17:03:53,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f3394ed/d1a7be23c08d41b7b69c5506d146264d [2019-11-28 17:03:53,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:03:53,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:03:53,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:53,708 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:03:53,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:03:53,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:53,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a770ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53, skipping insertion in model container [2019-11-28 17:03:53,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:53,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:03:53,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:03:53,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:53,906 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:03:53,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:03:53,938 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:03:53,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53 WrapperNode [2019-11-28 17:03:53,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:03:53,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:53,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:03:53,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:03:53,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:53,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:03:54,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:03:54,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:03:54,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:03:54,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (1/1) ... [2019-11-28 17:03:54,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:03:54,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:03:54,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:03:54,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:03:54,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (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 17:03:54,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:03:54,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:03:54,283 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:03:54,283 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 17:03:54,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:54 BoogieIcfgContainer [2019-11-28 17:03:54,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:03:54,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:03:54,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:03:54,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:03:54,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:03:53" (1/3) ... [2019-11-28 17:03:54,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95a13f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:54, skipping insertion in model container [2019-11-28 17:03:54,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:03:53" (2/3) ... [2019-11-28 17:03:54,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@95a13f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:03:54, skipping insertion in model container [2019-11-28 17:03:54,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:54" (3/3) ... [2019-11-28 17:03:54,292 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-11-28 17:03:54,302 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:03:54,309 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:03:54,322 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:03:54,348 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:03:54,348 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:03:54,349 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:03:54,349 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:03:54,349 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:03:54,349 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:03:54,350 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:03:54,350 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:03:54,365 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-28 17:03:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:03:54,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:54,371 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:03:54,371 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:54,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:54,376 INFO L82 PathProgramCache]: Analyzing trace with hash 30108868, now seen corresponding path program 1 times [2019-11-28 17:03:54,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:54,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957799208] [2019-11-28 17:03:54,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:54,489 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 17:03:54,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957799208] [2019-11-28 17:03:54,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:54,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:03:54,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066658901] [2019-11-28 17:03:54,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 17:03:54,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:54,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 17:03:54,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 17:03:54,517 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-28 17:03:54,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:54,535 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-28 17:03:54,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 17:03:54,536 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-28 17:03:54,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:54,546 INFO L225 Difference]: With dead ends: 18 [2019-11-28 17:03:54,546 INFO L226 Difference]: Without dead ends: 8 [2019-11-28 17:03:54,550 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 17:03:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-28 17:03:54,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-28 17:03:54,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 17:03:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-28 17:03:54,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2019-11-28 17:03:54,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:54,582 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-28 17:03:54,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 17:03:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-28 17:03:54,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:03:54,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:54,584 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:03:54,584 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:54,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:54,585 INFO L82 PathProgramCache]: Analyzing trace with hash 29781167, now seen corresponding path program 1 times [2019-11-28 17:03:54,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:54,586 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537082097] [2019-11-28 17:03:54,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:54,679 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 17:03:54,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537082097] [2019-11-28 17:03:54,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:03:54,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:03:54,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286951011] [2019-11-28 17:03:54,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:03:54,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:03:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:03:54,683 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-28 17:03:54,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:54,761 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-11-28 17:03:54,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 17:03:54,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-11-28 17:03:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:54,763 INFO L225 Difference]: With dead ends: 15 [2019-11-28 17:03:54,764 INFO L226 Difference]: Without dead ends: 11 [2019-11-28 17:03:54,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:03:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-28 17:03:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-28 17:03:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-28 17:03:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2019-11-28 17:03:54,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2019-11-28 17:03:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:54,770 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2019-11-28 17:03:54,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:03:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2019-11-28 17:03:54,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-28 17:03:54,781 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:54,781 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:54,781 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash -308490948, now seen corresponding path program 1 times [2019-11-28 17:03:54,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:54,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536506721] [2019-11-28 17:03:54,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:54,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:55,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536506721] [2019-11-28 17:03:55,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304274822] [2019-11-28 17:03:55,064 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 17:03:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:55,096 WARN L262 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:03:55,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:55,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:03:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:55,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:55,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-28 17:03:55,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141337446] [2019-11-28 17:03:55,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:03:55,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:03:55,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:03:55,282 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 14 states. [2019-11-28 17:03:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:55,582 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2019-11-28 17:03:55,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:03:55,583 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2019-11-28 17:03:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:55,584 INFO L225 Difference]: With dead ends: 31 [2019-11-28 17:03:55,584 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:03:55,586 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:03:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:03:55,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2019-11-28 17:03:55,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-28 17:03:55,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-11-28 17:03:55,593 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 8 [2019-11-28 17:03:55,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:55,594 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-11-28 17:03:55,594 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:03:55,595 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-11-28 17:03:55,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 17:03:55,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:55,596 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1] [2019-11-28 17:03:55,800 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:55,800 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1111984220, now seen corresponding path program 2 times [2019-11-28 17:03:55,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:55,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474064672] [2019-11-28 17:03:55,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 17:03:56,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474064672] [2019-11-28 17:03:56,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346441891] [2019-11-28 17:03:56,040 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 17:03:56,084 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:03:56,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:03:56,087 WARN L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-28 17:03:56,088 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:56,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 17:03:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:56,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:56,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2019-11-28 17:03:56,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72461277] [2019-11-28 17:03:56,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-28 17:03:56,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:56,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 17:03:56,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2019-11-28 17:03:56,330 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 19 states. [2019-11-28 17:03:56,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:56,912 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-28 17:03:56,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-28 17:03:56,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2019-11-28 17:03:56,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:56,915 INFO L225 Difference]: With dead ends: 34 [2019-11-28 17:03:56,915 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 17:03:56,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 17:03:56,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 17:03:56,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-28 17:03:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:03:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-28 17:03:56,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-28 17:03:56,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:56,922 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-28 17:03:56,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-28 17:03:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-28 17:03:56,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-28 17:03:56,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:56,923 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:57,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:57,135 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1125442374, now seen corresponding path program 1 times [2019-11-28 17:03:57,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:57,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240492985] [2019-11-28 17:03:57,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:57,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240492985] [2019-11-28 17:03:57,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320142177] [2019-11-28 17:03:57,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:03:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:57,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:03:57,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:57,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:57,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-28 17:03:57,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069144013] [2019-11-28 17:03:57,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:03:57,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:57,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:03:57,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:03:57,277 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 7 states. [2019-11-28 17:03:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:57,315 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-28 17:03:57,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:03:57,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-28 17:03:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:57,316 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:03:57,317 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:03:57,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:03:57,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:03:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2019-11-28 17:03:57,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-28 17:03:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-28 17:03:57,327 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2019-11-28 17:03:57,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:57,328 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-28 17:03:57,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:03:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2019-11-28 17:03:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-28 17:03:57,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:57,330 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:57,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:57,532 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:57,533 INFO L82 PathProgramCache]: Analyzing trace with hash -622858099, now seen corresponding path program 2 times [2019-11-28 17:03:57,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:57,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966789973] [2019-11-28 17:03:57,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:57,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966789973] [2019-11-28 17:03:57,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371009653] [2019-11-28 17:03:57,644 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-28 17:03:57,682 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:03:57,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:57,684 INFO L264 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 17:03:57,688 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:57,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:57,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-28 17:03:57,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342579275] [2019-11-28 17:03:57,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:03:57,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:57,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:03:57,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:03:57,706 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2019-11-28 17:03:57,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:57,767 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2019-11-28 17:03:57,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:03:57,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2019-11-28 17:03:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:57,775 INFO L225 Difference]: With dead ends: 36 [2019-11-28 17:03:57,775 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:03:57,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:03:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:03:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-28 17:03:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 17:03:57,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-28 17:03:57,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-28 17:03:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:57,781 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-28 17:03:57,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:03:57,781 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-28 17:03:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-28 17:03:57,782 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:57,782 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:57,985 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:57,986 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:57,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:57,987 INFO L82 PathProgramCache]: Analyzing trace with hash -390715430, now seen corresponding path program 3 times [2019-11-28 17:03:57,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:57,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484807166] [2019-11-28 17:03:57,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:58,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484807166] [2019-11-28 17:03:58,075 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446261666] [2019-11-28 17:03:58,075 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:58,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-28 17:03:58,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:03:58,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:03:58,109 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:58,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:58,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-28 17:03:58,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312247404] [2019-11-28 17:03:58,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:03:58,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:03:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:03:58,120 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 9 states. [2019-11-28 17:03:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:58,165 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-11-28 17:03:58,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:03:58,165 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-28 17:03:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:58,167 INFO L225 Difference]: With dead ends: 39 [2019-11-28 17:03:58,167 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 17:03:58,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:03:58,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 17:03:58,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-11-28 17:03:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 17:03:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-28 17:03:58,174 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2019-11-28 17:03:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:58,174 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-28 17:03:58,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:03:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-28 17:03:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-28 17:03:58,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:58,176 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:58,388 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:58,388 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash 474190189, now seen corresponding path program 4 times [2019-11-28 17:03:58,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:58,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406718445] [2019-11-28 17:03:58,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:58,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406718445] [2019-11-28 17:03:58,545 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952895866] [2019-11-28 17:03:58,546 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:58,569 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:03:58,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:03:58,570 INFO L264 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 17:03:58,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:58,579 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:58,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:58,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-28 17:03:58,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287985907] [2019-11-28 17:03:58,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:03:58,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:58,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:03:58,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:03:58,581 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-11-28 17:03:58,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:58,663 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-11-28 17:03:58,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:03:58,666 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-28 17:03:58,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:58,667 INFO L225 Difference]: With dead ends: 42 [2019-11-28 17:03:58,667 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 17:03:58,668 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:03:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 17:03:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-11-28 17:03:58,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-28 17:03:58,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2019-11-28 17:03:58,680 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2019-11-28 17:03:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:58,683 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2019-11-28 17:03:58,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:03:58,683 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2019-11-28 17:03:58,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-28 17:03:58,684 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:58,684 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:58,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:58,889 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:58,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:58,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1368677114, now seen corresponding path program 5 times [2019-11-28 17:03:58,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:58,890 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294093498] [2019-11-28 17:03:58,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:03:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:58,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294093498] [2019-11-28 17:03:58,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822828492] [2019-11-28 17:03:58,983 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:59,014 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-28 17:03:59,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:03:59,015 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:03:59,017 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:03:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:03:59,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:03:59,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-28 17:03:59,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792339820] [2019-11-28 17:03:59,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:03:59,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:03:59,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:03:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:03:59,029 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 11 states. [2019-11-28 17:03:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:03:59,097 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-11-28 17:03:59,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:03:59,097 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2019-11-28 17:03:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:03:59,098 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:03:59,098 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 17:03:59,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:03:59,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 17:03:59,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2019-11-28 17:03:59,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-28 17:03:59,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-28 17:03:59,105 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2019-11-28 17:03:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:03:59,105 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-28 17:03:59,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:03:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-28 17:03:59,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-28 17:03:59,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:03:59,106 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1] [2019-11-28 17:03:59,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:03:59,316 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:03:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:03:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1243411891, now seen corresponding path program 6 times [2019-11-28 17:03:59,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:03:59,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418883864] [2019-11-28 17:03:59,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:03:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:03:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 17:03:59,406 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 17:03:59,406 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 17:03:59,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:03:59 BoogieIcfgContainer [2019-11-28 17:03:59,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:03:59,443 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:03:59,443 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:03:59,443 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:03:59,444 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:03:54" (3/4) ... [2019-11-28 17:03:59,446 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 17:03:59,562 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:03:59,562 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:03:59,565 INFO L168 Benchmark]: Toolchain (without parser) took 5858.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 195.6 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -163.1 MB). Peak memory consumption was 32.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:59,565 INFO L168 Benchmark]: CDTParser took 0.31 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 17:03:59,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.79 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:59,568 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -185.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:59,569 INFO L168 Benchmark]: Boogie Preprocessor took 20.91 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. [2019-11-28 17:03:59,572 INFO L168 Benchmark]: RCFGBuilder took 234.87 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: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:59,573 INFO L168 Benchmark]: TraceAbstraction took 5156.42 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -13.2 MB). Peak memory consumption was 52.3 MB. Max. memory is 11.5 GB. [2019-11-28 17:03:59,573 INFO L168 Benchmark]: Witness Printer took 119.72 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. [2019-11-28 17:03:59,578 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 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 231.79 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 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 88.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -185.0 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.91 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 234.87 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: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5156.42 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 65.5 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -13.2 MB). Peak memory consumption was 52.3 MB. Max. memory is 11.5 GB. * Witness Printer took 119.72 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. * 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: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND TRUE i<10 [L15] sn = sn + (2) [L13] i++ [L13] COND TRUE i<=n [L14] COND FALSE !(i<10) [L13] i++ [L13] COND FALSE !(i<=n) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Result: UNSAFE, OverallTime: 5.0s, OverallIterations: 10, TraceHistogramMax: 10, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 71 SDslu, 141 SDs, 0 SdLazy, 487 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 229 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=9, 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, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 349 NumberOfCodeBlocks, 349 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 298 ConstructedInterpolants, 0 QuantifiedInterpolants, 21242 SizeOfPredicates, 15 NumberOfNonLiveVariables, 336 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 135/756 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...