/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:40:58,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:40:58,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:40:58,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:40:58,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:40:58,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:40:58,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:40:58,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:40:58,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:40:58,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:40:58,697 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:40:58,698 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:40:58,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:40:58,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:40:58,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:40:58,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:40:58,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:40:58,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:40:58,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:40:58,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:40:58,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:40:58,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:40:58,722 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:40:58,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:40:58,725 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:40:58,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:40:58,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:40:58,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:40:58,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:40:58,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:40:58,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:40:58,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:40:58,732 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:40:58,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:40:58,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:40:58,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:40:58,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:40:58,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:40:58,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:40:58,736 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:40:58,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:40:58,738 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:40:58,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:40:58,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:40:58,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:40:58,767 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:40:58,767 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:40:58,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:40:58,768 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:40:58,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:40:58,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:40:58,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:40:58,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:40:58,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:40:58,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:40:58,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:40:58,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:40:58,771 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:40:58,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:40:58,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:40:58,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:40:58,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:40:58,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:40:58,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:40:58,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:40:58,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:40:58,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:40:58,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:40:58,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:40:58,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:40:58,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:40:58,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:40:59,030 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:40:59,043 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:40:59,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:40:59,048 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:40:59,049 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:40:59,050 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-07-21 11:40:59,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51b59a0cf/9ca086ce68ee4ccdac7cb03f51ff0060/FLAG771d4b203 [2020-07-21 11:40:59,551 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:40:59,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-07-21 11:40:59,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51b59a0cf/9ca086ce68ee4ccdac7cb03f51ff0060/FLAG771d4b203 [2020-07-21 11:40:59,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51b59a0cf/9ca086ce68ee4ccdac7cb03f51ff0060 [2020-07-21 11:40:59,943 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:40:59,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:40:59,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:40:59,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:40:59,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:40:59,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:59" (1/1) ... [2020-07-21 11:40:59,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d765210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:40:59, skipping insertion in model container [2020-07-21 11:40:59,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:40:59" (1/1) ... [2020-07-21 11:40:59,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:40:59,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:41:00,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:41:00,143 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:41:00,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:41:00,173 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:41:00,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00 WrapperNode [2020-07-21 11:41:00,174 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:41:00,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:41:00,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:41:00,175 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:41:00,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... [2020-07-21 11:41:00,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... [2020-07-21 11:41:00,196 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... [2020-07-21 11:41:00,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... [2020-07-21 11:41:00,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... [2020-07-21 11:41:00,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... [2020-07-21 11:41:00,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... [2020-07-21 11:41:00,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:41:00,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:41:00,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:41:00,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:41:00,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:41:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:41:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:41:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:41:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:41:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:41:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:41:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:41:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:41:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:41:00,514 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:41:00,514 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:41:00,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:41:00 BoogieIcfgContainer [2020-07-21 11:41:00,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:41:00,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:41:00,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:41:00,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:41:00,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:40:59" (1/3) ... [2020-07-21 11:41:00,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f3cc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:41:00, skipping insertion in model container [2020-07-21 11:41:00,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:41:00" (2/3) ... [2020-07-21 11:41:00,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44f3cc95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:41:00, skipping insertion in model container [2020-07-21 11:41:00,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:41:00" (3/3) ... [2020-07-21 11:41:00,525 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-07-21 11:41:00,537 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:41:00,544 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:41:00,558 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:41:00,582 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:41:00,582 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:41:00,582 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:41:00,582 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:41:00,583 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:41:00,583 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:41:00,583 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:41:00,583 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:41:00,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-21 11:41:00,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-07-21 11:41:00,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:00,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:00,605 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2020-07-21 11:41:00,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:00,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521473281] [2020-07-21 11:41:00,617 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:41:00,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:00,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:41:00,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521473281] [2020-07-21 11:41:00,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:41:00,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:41:00,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129815864] [2020-07-21 11:41:00,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:41:00,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:41:00,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:41:00,742 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-07-21 11:41:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:00,782 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 11:41:00,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:41:00,785 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-07-21 11:41:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:00,794 INFO L225 Difference]: With dead ends: 29 [2020-07-21 11:41:00,794 INFO L226 Difference]: Without dead ends: 12 [2020-07-21 11:41:00,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:41:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-07-21 11:41:00,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-07-21 11:41:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-07-21 11:41:00,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-07-21 11:41:00,889 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-07-21 11:41:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:00,889 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-07-21 11:41:00,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:41:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-07-21 11:41:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:41:00,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:00,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:01,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:01,104 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:01,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:01,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2020-07-21 11:41:01,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:01,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454319548] [2020-07-21 11:41:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:01,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 11:41:01,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:01,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:01,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:41:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:01,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454319548] [2020-07-21 11:41:01,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:41:01,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-21 11:41:01,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006015957] [2020-07-21 11:41:01,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:41:01,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:01,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:41:01,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:41:01,218 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states. [2020-07-21 11:41:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:01,293 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-07-21 11:41:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:41:01,294 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-07-21 11:41:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:01,295 INFO L225 Difference]: With dead ends: 20 [2020-07-21 11:41:01,295 INFO L226 Difference]: Without dead ends: 15 [2020-07-21 11:41:01,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:41:01,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-07-21 11:41:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-07-21 11:41:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 11:41:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-21 11:41:01,301 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2020-07-21 11:41:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:01,302 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-21 11:41:01,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:41:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-21 11:41:01,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:41:01,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:01,303 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:01,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:01,517 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2020-07-21 11:41:01,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:01,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139847335] [2020-07-21 11:41:01,520 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:41:01,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 11:41:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:41:01,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:01,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:41:01,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:41:01,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139847335] [2020-07-21 11:41:01,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:41:01,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-21 11:41:01,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358320636] [2020-07-21 11:41:01,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 11:41:01,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:41:01,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 11:41:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:41:01,748 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-07-21 11:41:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:41:01,823 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-21 11:41:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 11:41:01,825 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-07-21 11:41:01,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:41:01,826 INFO L225 Difference]: With dead ends: 22 [2020-07-21 11:41:01,826 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 11:41:01,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:41:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 11:41:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 11:41:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 11:41:01,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 11:41:01,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-07-21 11:41:01,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:41:01,841 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 11:41:01,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 11:41:01,842 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 11:41:01,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 11:41:01,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:41:01,842 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:41:02,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:02,044 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:41:02,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:41:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2020-07-21 11:41:02,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:41:02,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828843380] [2020-07-21 11:41:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:41:02,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:41:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:41:02,089 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:41:02,107 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:41:02,107 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:41:02,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:41:02,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:41:02 BoogieIcfgContainer [2020-07-21 11:41:02,344 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:41:02,347 INFO L168 Benchmark]: Toolchain (without parser) took 2401.59 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 102.6 MB in the beginning and 102.1 MB in the end (delta: 465.1 kB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:41:02,348 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:41:02,349 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.69 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:41:02,350 INFO L168 Benchmark]: Boogie Preprocessor took 31.46 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 11:41:02,351 INFO L168 Benchmark]: RCFGBuilder took 311.21 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 170.3 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-07-21 11:41:02,352 INFO L168 Benchmark]: TraceAbstraction took 1825.52 ms. Allocated memory is still 201.9 MB. Free memory was 169.6 MB in the beginning and 102.1 MB in the end (delta: 67.5 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:41:02,356 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 227.69 ms. Allocated memory is still 137.9 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.46 ms. Allocated memory is still 137.9 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 311.21 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 170.3 MB in the end (delta: -78.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1825.52 ms. Allocated memory is still 201.9 MB. Free memory was 169.6 MB in the beginning and 102.1 MB in the end (delta: 67.5 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 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: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 0 SDslu, 94 SDs, 0 SdLazy, 57 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 1271 SizeOfPredicates, 3 NumberOfNonLiveVariables, 97 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/22 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...