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 -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:14:23,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:14:23,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:14:23,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:14:23,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:14:23,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:14:23,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:14:23,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:14:23,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:14:23,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:14:23,061 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:14:23,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:14:23,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:14:23,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:14:23,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:14:23,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:14:23,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:14:23,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:14:23,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:14:23,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:14:23,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:14:23,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:14:23,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:14:23,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:14:23,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:14:23,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:14:23,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:14:23,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:14:23,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:14:23,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:14:23,099 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:14:23,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:14:23,100 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:14:23,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:14:23,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:14:23,102 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:14:23,103 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 [2019-10-14 23:14:23,123 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:14:23,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:14:23,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:14:23,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:14:23,125 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:14:23,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:14:23,126 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:14:23,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:14:23,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:14:23,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:14:23,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:14:23,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:14:23,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:14:23,129 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:14:23,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:14:23,129 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:14:23,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:14:23,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:14:23,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:14:23,131 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:14:23,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:14:23,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:14:23,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:14:23,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:14:23,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:14:23,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:14:23,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:14:23,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:14:23,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:14:23,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:14:23,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:14:23,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:14:23,436 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:14:23,436 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:14:23,437 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-10-14 23:14:23,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3062cc2ef/0bf4a63bd94147538455a8784dd7c551/FLAG4176e1718 [2019-10-14 23:14:23,972 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:14:23,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c [2019-10-14 23:14:23,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3062cc2ef/0bf4a63bd94147538455a8784dd7c551/FLAG4176e1718 [2019-10-14 23:14:24,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3062cc2ef/0bf4a63bd94147538455a8784dd7c551 [2019-10-14 23:14:24,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:14:24,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:14:24,433 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:24,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:14:24,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:14:24,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69200ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24, skipping insertion in model container [2019-10-14 23:14:24,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,452 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:14:24,473 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:14:24,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:24,664 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:14:24,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:14:24,696 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:14:24,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24 WrapperNode [2019-10-14 23:14:24,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:14:24,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:14:24,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:14:24,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:14:24,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (1/1) ... [2019-10-14 23:14:24,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:14:24,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:14:24,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:14:24,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:14:24,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (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 [2019-10-14 23:14:24,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:14:24,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:14:24,861 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:14:24,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:14:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:14:24,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:14:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:14:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:14:24,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:14:25,024 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:14:25,024 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:14:25,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:25 BoogieIcfgContainer [2019-10-14 23:14:25,026 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:14:25,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:14:25,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:14:25,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:14:25,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:14:24" (1/3) ... [2019-10-14 23:14:25,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1d50e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:25, skipping insertion in model container [2019-10-14 23:14:25,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:14:24" (2/3) ... [2019-10-14 23:14:25,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c1d50e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:14:25, skipping insertion in model container [2019-10-14 23:14:25,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:14:25" (3/3) ... [2019-10-14 23:14:25,039 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2019-10-14 23:14:25,056 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:14:25,063 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:14:25,074 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:14:25,098 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:14:25,098 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:14:25,098 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:14:25,099 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:14:25,099 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:14:25,099 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:14:25,099 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:14:25,099 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:14:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-14 23:14:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-14 23:14:25,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:25,123 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:25,125 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-10-14 23:14:25,137 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:25,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142626391] [2019-10-14 23:14:25,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:25,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:25,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:25,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142626391] [2019-10-14 23:14:25,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:14:25,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:14:25,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974303965] [2019-10-14 23:14:25,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:14:25,411 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:25,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:14:25,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:14:25,430 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-10-14 23:14:25,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:25,498 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-14 23:14:25,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:25,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-10-14 23:14:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:25,509 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:14:25,509 INFO L226 Difference]: Without dead ends: 12 [2019-10-14 23:14:25,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:14:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-14 23:14:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-14 23:14:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-14 23:14:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-14 23:14:25,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-14 23:14:25,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:25,553 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-14 23:14:25,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:14:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-14 23:14:25,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:14:25,554 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:25,555 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:25,555 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:25,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-10-14 23:14:25,556 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:25,557 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686545143] [2019-10-14 23:14:25,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:25,557 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:25,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:25,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686545143] [2019-10-14 23:14:25,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120813931] [2019-10-14 23:14:25,673 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 [2019-10-14 23:14:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:25,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:14:25,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:25,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:25,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2019-10-14 23:14:25,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879236887] [2019-10-14 23:14:25,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:14:25,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:25,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:14:25,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:14:25,773 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2019-10-14 23:14:25,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:25,816 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-14 23:14:25,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:14:25,817 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2019-10-14 23:14:25,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:25,818 INFO L225 Difference]: With dead ends: 18 [2019-10-14 23:14:25,818 INFO L226 Difference]: Without dead ends: 13 [2019-10-14 23:14:25,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:14:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-14 23:14:25,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-14 23:14:25,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-14 23:14:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-14 23:14:25,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-14 23:14:25,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:25,825 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-14 23:14:25,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:14:25,825 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-14 23:14:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:14:25,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:25,826 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:26,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:26,032 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-10-14 23:14:26,034 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:26,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99085806] [2019-10-14 23:14:26,035 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:26,035 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:26,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:26,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:26,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99085806] [2019-10-14 23:14:26,202 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128319616] [2019-10-14 23:14:26,202 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:26,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:14:26,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:26,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:14:26,250 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:26,284 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:26,285 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2019-10-14 23:14:26,285 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20335121] [2019-10-14 23:14:26,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:14:26,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:26,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:14:26,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:26,287 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2019-10-14 23:14:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:26,325 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-14 23:14:26,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:14:26,326 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-10-14 23:14:26,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:26,326 INFO L225 Difference]: With dead ends: 19 [2019-10-14 23:14:26,327 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:14:26,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:14:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:14:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-14 23:14:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:14:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-14 23:14:26,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-14 23:14:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:26,332 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-14 23:14:26,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:14:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-14 23:14:26,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:14:26,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:26,334 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:26,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:26,539 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-10-14 23:14:26,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:26,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787674045] [2019-10-14 23:14:26,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:26,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:26,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:26,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787674045] [2019-10-14 23:14:26,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619034855] [2019-10-14 23:14:26,694 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:26,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:14:26,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:26,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:14:26,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:26,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:26,779 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:26,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2019-10-14 23:14:26,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444469935] [2019-10-14 23:14:26,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:14:26,780 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:26,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:14:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:26,781 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2019-10-14 23:14:26,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:26,844 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-14 23:14:26,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:14:26,845 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-10-14 23:14:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:26,846 INFO L225 Difference]: With dead ends: 20 [2019-10-14 23:14:26,846 INFO L226 Difference]: Without dead ends: 15 [2019-10-14 23:14:26,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:14:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-14 23:14:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-14 23:14:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:14:26,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-14 23:14:26,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-14 23:14:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:26,855 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-14 23:14:26,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:14:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-14 23:14:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:14:26,857 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:26,857 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:27,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:27,058 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-10-14 23:14:27,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:27,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177704581] [2019-10-14 23:14:27,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:27,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:27,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:27,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:27,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:27,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177704581] [2019-10-14 23:14:27,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094049048] [2019-10-14 23:14:27,221 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:27,250 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:14:27,250 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:27,252 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:14:27,253 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:27,279 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:27,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-14 23:14:27,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316495206] [2019-10-14 23:14:27,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:14:27,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:14:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:27,281 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2019-10-14 23:14:27,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:27,340 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-14 23:14:27,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:14:27,340 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-10-14 23:14:27,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:27,341 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:14:27,341 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:14:27,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:14:27,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:14:27,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:14:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:14:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-14 23:14:27,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-14 23:14:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:27,346 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-14 23:14:27,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:14:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-14 23:14:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:14:27,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:27,348 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:27,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:27,550 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-10-14 23:14:27,551 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:27,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468022689] [2019-10-14 23:14:27,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:27,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:27,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:14:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:27,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468022689] [2019-10-14 23:14:27,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529893542] [2019-10-14 23:14:27,782 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:27,817 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 23:14:27,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:14:27,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:14:27,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:14:27,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:14:27,845 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:14:27,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 11 [2019-10-14 23:14:27,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674825288] [2019-10-14 23:14:27,846 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:14:27,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:14:27,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:14:27,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:27,847 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 11 states. [2019-10-14 23:14:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:14:27,913 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-14 23:14:27,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:14:27,914 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-10-14 23:14:27,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:14:27,915 INFO L225 Difference]: With dead ends: 22 [2019-10-14 23:14:27,915 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:14:27,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:14:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:14:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:14:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:14:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-14 23:14:27,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-14 23:14:27,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:14:27,925 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-14 23:14:27,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:14:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-14 23:14:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:14:27,926 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:14:27,926 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:14:28,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:14:28,128 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:14:28,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:14:28,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-10-14 23:14:28,128 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:14:28,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118533472] [2019-10-14 23:14:28,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:14:28,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:14:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:14:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-14 23:14:28,185 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-14 23:14:28,185 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-14 23:14:28,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:14:28 BoogieIcfgContainer [2019-10-14 23:14:28,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:14:28,222 INFO L168 Benchmark]: Toolchain (without parser) took 3788.21 ms. Allocated memory was 139.5 MB in the beginning and 234.4 MB in the end (delta: 94.9 MB). Free memory was 103.0 MB in the beginning and 129.0 MB in the end (delta: -26.0 MB). Peak memory consumption was 68.9 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:28,228 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 139.5 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-14 23:14:28,230 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.96 ms. Allocated memory is still 139.5 MB. Free memory was 102.8 MB in the beginning and 93.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:28,231 INFO L168 Benchmark]: Boogie Preprocessor took 110.05 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.6 MB in the beginning and 180.6 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:28,232 INFO L168 Benchmark]: RCFGBuilder took 217.63 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 169.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:28,233 INFO L168 Benchmark]: TraceAbstraction took 3190.36 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 169.1 MB in the beginning and 129.0 MB in the end (delta: 40.1 MB). Peak memory consumption was 72.7 MB. Max. memory is 7.1 GB. [2019-10-14 23:14:28,248 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 139.5 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.96 ms. Allocated memory is still 139.5 MB. Free memory was 102.8 MB in the beginning and 93.6 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 110.05 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 93.6 MB in the beginning and 180.6 MB in the end (delta: -87.0 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 217.63 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 169.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3190.36 ms. Allocated memory was 201.9 MB in the beginning and 234.4 MB in the end (delta: 32.5 MB). Free memory was 169.1 MB in the beginning and 129.0 MB in the end (delta: 40.1 MB). Peak memory consumption was 72.7 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(x != 6) 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: 3.1s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 1 SDslu, 304 SDs, 0 SdLazy, 205 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 5249 SizeOfPredicates, 0 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 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...