./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-loops/diamond_2-1.c --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/bitvector-loops/diamond_2-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7aeed2387a92d93d76a9218958b4bab5d23187f1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 15:39:21,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 15:39:21,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 15:39:21,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 15:39:21,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 15:39:21,169 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 15:39:21,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 15:39:21,173 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 15:39:21,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 15:39:21,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 15:39:21,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 15:39:21,179 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 15:39:21,179 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 15:39:21,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 15:39:21,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 15:39:21,183 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 15:39:21,184 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 15:39:21,185 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 15:39:21,188 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 15:39:21,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 15:39:21,194 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 15:39:21,198 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 15:39:21,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 15:39:21,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 15:39:21,205 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 15:39:21,205 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 15:39:21,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 15:39:21,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 15:39:21,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 15:39:21,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 15:39:21,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 15:39:21,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 15:39:21,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 15:39:21,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 15:39:21,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 15:39:21,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 15:39:21,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 15:39:21,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 15:39:21,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 15:39:21,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 15:39:21,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 15:39:21,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 15:39:21,248 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 15:39:21,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 15:39:21,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 15:39:21,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 15:39:21,253 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 15:39:21,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 15:39:21,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 15:39:21,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 15:39:21,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 15:39:21,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 15:39:21,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 15:39:21,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 15:39:21,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 15:39:21,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 15:39:21,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 15:39:21,256 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 15:39:21,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 15:39:21,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 15:39:21,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 15:39:21,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 15:39:21,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 15:39:21,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 15:39:21,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 15:39:21,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 15:39:21,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 15:39:21,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 15:39:21,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 15:39:21,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 15:39:21,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 15:39:21,259 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 -> 7aeed2387a92d93d76a9218958b4bab5d23187f1 [2019-11-28 15:39:21,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 15:39:21,601 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 15:39:21,605 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 15:39:21,607 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 15:39:21,607 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 15:39:21,608 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2019-11-28 15:39:21,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ac93ba1/dd6937cf74f94ac2861d9f08a0b3ebba/FLAG6d6ff05e1 [2019-11-28 15:39:22,148 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 15:39:22,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/diamond_2-1.c [2019-11-28 15:39:22,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ac93ba1/dd6937cf74f94ac2861d9f08a0b3ebba/FLAG6d6ff05e1 [2019-11-28 15:39:22,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19ac93ba1/dd6937cf74f94ac2861d9f08a0b3ebba [2019-11-28 15:39:22,518 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 15:39:22,520 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 15:39:22,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 15:39:22,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 15:39:22,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 15:39:22,526 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477caf30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22, skipping insertion in model container [2019-11-28 15:39:22,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,537 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 15:39:22,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 15:39:22,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:39:22,756 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 15:39:22,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 15:39:22,811 INFO L208 MainTranslator]: Completed translation [2019-11-28 15:39:22,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22 WrapperNode [2019-11-28 15:39:22,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 15:39:22,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 15:39:22,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 15:39:22,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 15:39:22,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,919 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 15:39:22,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 15:39:22,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 15:39:22,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 15:39:22,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (1/1) ... [2019-11-28 15:39:22,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 15:39:22,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 15:39:22,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 15:39:22,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 15:39:22,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (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 15:39:23,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 15:39:23,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 15:39:23,301 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 15:39:23,302 INFO L287 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-28 15:39:23,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:39:23 BoogieIcfgContainer [2019-11-28 15:39:23,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 15:39:23,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 15:39:23,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 15:39:23,308 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 15:39:23,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:39:22" (1/3) ... [2019-11-28 15:39:23,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305469e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:39:23, skipping insertion in model container [2019-11-28 15:39:23,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:39:22" (2/3) ... [2019-11-28 15:39:23,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305469e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:39:23, skipping insertion in model container [2019-11-28 15:39:23,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:39:23" (3/3) ... [2019-11-28 15:39:23,313 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2019-11-28 15:39:23,346 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 15:39:23,355 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 15:39:23,366 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 15:39:23,391 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 15:39:23,391 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 15:39:23,391 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 15:39:23,391 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 15:39:23,391 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 15:39:23,393 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 15:39:23,393 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 15:39:23,393 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 15:39:23,406 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-28 15:39:23,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 15:39:23,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:39:23,411 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 15:39:23,412 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:39:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:39:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash 31771204, now seen corresponding path program 1 times [2019-11-28 15:39:23,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:39:23,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808614199] [2019-11-28 15:39:23,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:39:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:39:23,515 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 15:39:23,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808614199] [2019-11-28 15:39:23,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:39:23,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:39:23,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500981176] [2019-11-28 15:39:23,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 15:39:23,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:39:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 15:39:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 15:39:23,536 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-11-28 15:39:23,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:39:23,554 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2019-11-28 15:39:23,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 15:39:23,556 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-28 15:39:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:39:23,566 INFO L225 Difference]: With dead ends: 26 [2019-11-28 15:39:23,566 INFO L226 Difference]: Without dead ends: 16 [2019-11-28 15:39:23,569 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 15:39:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-28 15:39:23,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-28 15:39:23,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 15:39:23,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 26 transitions. [2019-11-28 15:39:23,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 26 transitions. Word has length 5 [2019-11-28 15:39:23,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:39:23,600 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 26 transitions. [2019-11-28 15:39:23,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 15:39:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 26 transitions. [2019-11-28 15:39:23,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 15:39:23,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:39:23,601 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 15:39:23,602 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:39:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:39:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash 29864580, now seen corresponding path program 1 times [2019-11-28 15:39:23,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:39:23,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305998867] [2019-11-28 15:39:23,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:39:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:39:23,724 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 15:39:23,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305998867] [2019-11-28 15:39:23,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:39:23,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 15:39:23,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228784645] [2019-11-28 15:39:23,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:39:23,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:39:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:39:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:39:23,728 INFO L87 Difference]: Start difference. First operand 16 states and 26 transitions. Second operand 3 states. [2019-11-28 15:39:23,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:39:23,798 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2019-11-28 15:39:23,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:39:23,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-28 15:39:23,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:39:23,802 INFO L225 Difference]: With dead ends: 22 [2019-11-28 15:39:23,802 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 15:39:23,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 1 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 15:39:23,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 15:39:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2019-11-28 15:39:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 15:39:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2019-11-28 15:39:23,808 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 5 [2019-11-28 15:39:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:39:23,809 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2019-11-28 15:39:23,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:39:23,809 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2019-11-28 15:39:23,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:39:23,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:39:23,810 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:39:23,810 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:39:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:39:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1273519218, now seen corresponding path program 1 times [2019-11-28 15:39:23,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:39:23,811 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912417960] [2019-11-28 15:39:23,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:39:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:39:25,910 WARN L192 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 27 DAG size of output: 12 [2019-11-28 15:39:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:39:25,916 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912417960] [2019-11-28 15:39:25,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:39:25,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:39:25,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216357495] [2019-11-28 15:39:25,917 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:39:25,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:39:25,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:39:25,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:39:25,918 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand 3 states. [2019-11-28 15:39:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:39:26,060 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2019-11-28 15:39:26,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:39:26,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-28 15:39:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:39:26,064 INFO L225 Difference]: With dead ends: 47 [2019-11-28 15:39:26,064 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 15:39:26,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:39:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 15:39:26,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2019-11-28 15:39:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 15:39:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2019-11-28 15:39:26,078 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 16 [2019-11-28 15:39:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:39:26,079 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2019-11-28 15:39:26,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:39:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2019-11-28 15:39:26,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:39:26,081 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:39:26,081 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:39:26,082 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:39:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:39:26,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1974583796, now seen corresponding path program 1 times [2019-11-28 15:39:26,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:39:26,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798401983] [2019-11-28 15:39:26,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:39:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:39:26,429 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 15:39:26,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798401983] [2019-11-28 15:39:26,430 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773211501] [2019-11-28 15:39:26,430 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 15:39:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:39:26,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-28 15:39:26,489 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 15:39:26,576 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 15:39:26,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 15:39:26,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-28 15:39:26,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985042237] [2019-11-28 15:39:26,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 15:39:26,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:39:26,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 15:39:26,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 15:39:26,582 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand 14 states. [2019-11-28 15:39:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:39:26,860 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2019-11-28 15:39:26,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 15:39:26,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2019-11-28 15:39:26,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:39:26,862 INFO L225 Difference]: With dead ends: 45 [2019-11-28 15:39:26,862 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 15:39:26,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 15:39:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 15:39:26,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-28 15:39:26,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 15:39:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2019-11-28 15:39:26,870 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 16 [2019-11-28 15:39:26,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:39:26,870 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2019-11-28 15:39:26,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 15:39:26,870 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2019-11-28 15:39:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:39:26,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:39:26,871 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:39:27,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 15:39:27,077 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:39:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:39:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1309266250, now seen corresponding path program 1 times [2019-11-28 15:39:27,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:39:27,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239170557] [2019-11-28 15:39:27,080 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:39:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 15:39:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 15:39:27,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239170557] [2019-11-28 15:39:27,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 15:39:27,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 15:39:27,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418285972] [2019-11-28 15:39:27,165 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 15:39:27,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 15:39:27,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 15:39:27,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 15:39:27,168 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 3 states. [2019-11-28 15:39:27,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 15:39:27,252 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-11-28 15:39:27,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 15:39:27,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-28 15:39:27,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 15:39:27,254 INFO L225 Difference]: With dead ends: 58 [2019-11-28 15:39:27,254 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 15:39:27,254 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 15:39:27,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 15:39:27,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2019-11-28 15:39:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-28 15:39:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-28 15:39:27,262 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 16 [2019-11-28 15:39:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 15:39:27,262 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-28 15:39:27,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 15:39:27,263 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-28 15:39:27,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 15:39:27,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 15:39:27,264 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 15:39:27,265 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 15:39:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 15:39:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1301479604, now seen corresponding path program 1 times [2019-11-28 15:39:27,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 15:39:27,266 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667748535] [2019-11-28 15:39:27,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 15:39:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:39:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 15:39:27,364 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 15:39:27,365 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 15:39:27,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:39:27 BoogieIcfgContainer [2019-11-28 15:39:27,386 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 15:39:27,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 15:39:27,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 15:39:27,387 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 15:39:27,387 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:39:23" (3/4) ... [2019-11-28 15:39:27,390 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 15:39:27,445 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 15:39:27,445 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 15:39:27,447 INFO L168 Benchmark]: Toolchain (without parser) took 4926.87 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 959.0 MB in the beginning and 976.8 MB in the end (delta: -17.8 MB). Peak memory consumption was 132.1 MB. Max. memory is 11.5 GB. [2019-11-28 15:39:27,447 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:39:27,448 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.16 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:39:27,449 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -198.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 15:39:27,450 INFO L168 Benchmark]: Boogie Preprocessor took 25.86 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 15:39:27,450 INFO L168 Benchmark]: RCFGBuilder took 358.16 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2019-11-28 15:39:27,451 INFO L168 Benchmark]: TraceAbstraction took 4081.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.8 MB in the end (delta: 138.2 MB). Peak memory consumption was 138.2 MB. Max. memory is 11.5 GB. [2019-11-28 15:39:27,452 INFO L168 Benchmark]: Witness Printer took 58.79 ms. Allocated memory is still 1.2 GB. Free memory is still 976.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 15:39:27,455 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 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 291.16 ms. Allocated memory is still 1.0 GB. Free memory was 959.0 MB in the beginning and 948.3 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 101.11 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 948.3 MB in the beginning and 1.1 GB in the end (delta: -198.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 25.86 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 358.16 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: 25.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4081.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 976.8 MB in the end (delta: 138.2 MB). Peak memory consumption was 138.2 MB. Max. memory is 11.5 GB. * Witness Printer took 58.79 ms. Allocated memory is still 1.2 GB. Free memory is still 976.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Result: UNSAFE, OverallTime: 3.9s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 30 SDslu, 22 SDs, 0 SdLazy, 316 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=4, 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, 5 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 5126 SizeOfPredicates, 1 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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...