java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:04:37,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:04:37,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:04:37,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:04:37,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:04:37,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:04:37,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:04:37,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:04:37,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:04:37,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:04:37,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:04:37,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:04:37,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:04:37,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:04:37,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:04:37,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:04:37,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:04:37,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:04:37,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:04:37,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:04:37,962 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:04:37,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:04:37,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:04:37,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:04:37,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:04:37,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:04:37,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:04:37,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:04:37,977 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 [2019-10-15 01:04:37,991 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:04:37,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:04:37,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:04:37,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:04:37,993 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:04:37,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:04:37,993 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:04:37,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:04:37,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:04:37,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:04:37,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:04:37,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:04:37,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:04:37,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:04:37,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:04:37,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:04:37,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:04:37,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:04:37,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:04:37,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:04:37,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:04:37,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:04:37,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:04:37,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:04:37,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:04:37,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:04:37,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:04:37,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:04:37,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:04:38,283 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:04:38,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:04:38,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:04:38,302 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:04:38,302 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:04:38,303 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-10-15 01:04:38,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3bef58e/68e5b8d5982d4213aa4db7b179bcd92e/FLAG34d009db8 [2019-10-15 01:04:38,845 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:04:38,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-10-15 01:04:38,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3bef58e/68e5b8d5982d4213aa4db7b179bcd92e/FLAG34d009db8 [2019-10-15 01:04:39,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a3bef58e/68e5b8d5982d4213aa4db7b179bcd92e [2019-10-15 01:04:39,205 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:04:39,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:04:39,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:39,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:04:39,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:04:39,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6584bdd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39, skipping insertion in model container [2019-10-15 01:04:39,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,222 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:04:39,237 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:04:39,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:39,425 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:04:39,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:04:39,450 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:04:39,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39 WrapperNode [2019-10-15 01:04:39,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:04:39,452 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:04:39,452 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:04:39,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:04:39,548 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (1/1) ... [2019-10-15 01:04:39,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:04:39,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:04:39,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:04:39,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:04:39,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (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 [2019-10-15 01:04:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:04:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:04:39,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:04:39,615 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:04:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:04:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:04:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:04:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:04:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:04:39,776 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:04:39,776 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:04:39,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:39 BoogieIcfgContainer [2019-10-15 01:04:39,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:04:39,779 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:04:39,779 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:04:39,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:04:39,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:04:39" (1/3) ... [2019-10-15 01:04:39,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56256dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:39, skipping insertion in model container [2019-10-15 01:04:39,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:04:39" (2/3) ... [2019-10-15 01:04:39,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56256dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:04:39, skipping insertion in model container [2019-10-15 01:04:39,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:04:39" (3/3) ... [2019-10-15 01:04:39,786 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-10-15 01:04:39,795 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:04:39,802 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:04:39,813 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:04:39,838 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:04:39,839 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:04:39,839 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:04:39,839 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:04:39,839 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:04:39,839 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:04:39,839 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:04:39,840 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:04:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 01:04:39,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 01:04:39,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:39,863 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:39,865 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-10-15 01:04:39,878 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:39,879 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145761022] [2019-10-15 01:04:39,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:39,879 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:39,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145761022] [2019-10-15 01:04:40,066 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:04:40,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:04:40,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143523572] [2019-10-15 01:04:40,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:04:40,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:40,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:04:40,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:04:40,103 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 01:04:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:40,147 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-15 01:04:40,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:04:40,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 01:04:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:40,158 INFO L225 Difference]: With dead ends: 29 [2019-10-15 01:04:40,158 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 01:04:40,161 INFO L600 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 [2019-10-15 01:04:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 01:04:40,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 01:04:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 01:04:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 01:04:40,208 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 01:04:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:40,209 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 01:04:40,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:04:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 01:04:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:04:40,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:40,210 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:40,210 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:40,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-10-15 01:04:40,211 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:40,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983762052] [2019-10-15 01:04:40,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983762052] [2019-10-15 01:04:40,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294737232] [2019-10-15 01:04:40,332 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 [2019-10-15 01:04:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:40,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:04:40,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,420 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:40,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [337018180] [2019-10-15 01:04:40,474 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 12 [2019-10-15 01:04:40,503 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:04:40,504 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:04:40,560 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-15 01:04:40,630 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 01:04:40,634 INFO L272 AbstractInterpreter]: Visited 11 different actions 47 times. Merged at 2 different actions 12 times. Widened at 1 different actions 4 times. Performed 89 root evaluator evaluations with a maximum evaluation depth of 6. Performed 89 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-10-15 01:04:40,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:40,639 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:04:40,639 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:40,640 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-10-15 01:04:40,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115475162] [2019-10-15 01:04:40,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 01:04:40,642 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:40,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 01:04:40,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:04:40,643 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2019-10-15 01:04:40,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:40,732 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-15 01:04:40,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:04:40,734 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-15 01:04:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:40,735 INFO L225 Difference]: With dead ends: 20 [2019-10-15 01:04:40,735 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:04:40,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:04:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:04:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:04:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:04:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 01:04:40,749 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 01:04:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:40,751 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 01:04:40,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 01:04:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 01:04:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:04:40,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:40,752 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:40,955 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:40,955 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:40,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times [2019-10-15 01:04:40,957 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:40,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764772185] [2019-10-15 01:04:40,958 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,958 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:40,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:04:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764772185] [2019-10-15 01:04:41,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437200866] [2019-10-15 01:04:41,144 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:41,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:04:41,188 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:04:41,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:04:41,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:04:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,220 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:04:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:04:41,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2094973975] [2019-10-15 01:04:41,323 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-10-15 01:04:41,324 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-10-15 01:04:41,324 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:04:41,324 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2019-10-15 01:04:41,325 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543514000] [2019-10-15 01:04:41,325 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-15 01:04:41,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:04:41,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-15 01:04:41,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:04:41,327 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2019-10-15 01:04:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:04:41,388 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2019-10-15 01:04:41,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:04:41,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-10-15 01:04:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:04:41,389 INFO L225 Difference]: With dead ends: 22 [2019-10-15 01:04:41,389 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:04:41,390 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:04:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:04:41,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:04:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:04:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-15 01:04:41,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-10-15 01:04:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:04:41,395 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-15 01:04:41,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-15 01:04:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-15 01:04:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:04:41,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:04:41,396 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:04:41,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:04:41,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:04:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:04:41,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times [2019-10-15 01:04:41,610 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:04:41,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836096562] [2019-10-15 01:04:41,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:04:41,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:04:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:04:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 01:04:41,672 INFO L168 tionRefinementEngine]: Strategy TAIPAN found a feasible trace [2019-10-15 01:04:41,672 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 01:04:41,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:04:41 BoogieIcfgContainer [2019-10-15 01:04:41,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:04:41,700 INFO L168 Benchmark]: Toolchain (without parser) took 2492.95 ms. Allocated memory was 140.0 MB in the beginning and 232.8 MB in the end (delta: 92.8 MB). Free memory was 101.0 MB in the beginning and 195.7 MB in the end (delta: -94.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-10-15 01:04:41,701 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-15 01:04:41,702 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.02 ms. Allocated memory is still 140.0 MB. Free memory was 100.8 MB in the beginning and 91.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:41,703 INFO L168 Benchmark]: Boogie Preprocessor took 114.23 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 180.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:41,704 INFO L168 Benchmark]: RCFGBuilder took 211.66 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 170.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:41,705 INFO L168 Benchmark]: TraceAbstraction took 1918.57 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 170.1 MB in the beginning and 195.7 MB in the end (delta: -25.6 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. [2019-10-15 01:04:41,711 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.0 MB. Free memory was 119.2 MB in the beginning and 119.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.02 ms. Allocated memory is still 140.0 MB. Free memory was 100.8 MB in the beginning and 91.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.23 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.5 MB in the beginning and 180.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 211.66 ms. Allocated memory is still 201.9 MB. Free memory was 180.7 MB in the beginning and 170.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1918.57 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 170.1 MB in the beginning and 195.7 MB in the end (delta: -25.6 MB). Peak memory consumption was 5.4 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. Result: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 0 SDslu, 78 SDs, 0 SdLazy, 50 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2518 SizeOfPredicates, 2 NumberOfNonLiveVariables, 73 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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...