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_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:15:20,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:15:20,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:15:20,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:15:20,930 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:15:20,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:15:20,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:15:20,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:15:20,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:15:20,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:15:20,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:15:20,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:15:20,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:15:20,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:15:20,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:15:20,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:15:20,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:15:20,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:15:20,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:15:20,970 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:15:20,974 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:15:20,976 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:15:20,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:15:20,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:15:20,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:15:20,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:15:20,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:15:20,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:15:20,994 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 [2019-10-13 19:15:21,020 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:15:21,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:15:21,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:15:21,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:15:21,024 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:15:21,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:15:21,025 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:15:21,025 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:15:21,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:15:21,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:15:21,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:15:21,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:15:21,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:15:21,026 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:15:21,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:15:21,026 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:15:21,027 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:15:21,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:15:21,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:15:21,027 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:15:21,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:15:21,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:21,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:15:21,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:15:21,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:15:21,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:15:21,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:15:21,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:15:21,029 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:15:21,307 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:15:21,320 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:15:21,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:15:21,326 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:15:21,326 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:15:21,327 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-10-13 19:15:21,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd095955/8fef16457b9240c793b0a5f0df51016c/FLAG1b4c4ba2b [2019-10-13 19:15:21,832 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:15:21,833 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2019-10-13 19:15:21,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd095955/8fef16457b9240c793b0a5f0df51016c/FLAG1b4c4ba2b [2019-10-13 19:15:22,238 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3cd095955/8fef16457b9240c793b0a5f0df51016c [2019-10-13 19:15:22,249 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:15:22,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:15:22,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:22,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:15:22,256 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:15:22,257 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,260 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22, skipping insertion in model container [2019-10-13 19:15:22,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,268 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:15:22,285 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:15:22,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:22,462 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:15:22,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:15:22,494 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:15:22,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22 WrapperNode [2019-10-13 19:15:22,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:15:22,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:15:22,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:15:22,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:15:22,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,609 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... [2019-10-13 19:15:22,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:15:22,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:15:22,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:15:22,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:15:22,613 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:15:22,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:15:22,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:15:22,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:15:22,681 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:15:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:15:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:15:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:15:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:15:22,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:15:22,836 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:15:22,836 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 19:15:22,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:22 BoogieIcfgContainer [2019-10-13 19:15:22,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:15:22,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:15:22,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:15:22,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:15:22,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:15:22" (1/3) ... [2019-10-13 19:15:22,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aba2b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:22, skipping insertion in model container [2019-10-13 19:15:22,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:15:22" (2/3) ... [2019-10-13 19:15:22,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aba2b1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:15:22, skipping insertion in model container [2019-10-13 19:15:22,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:15:22" (3/3) ... [2019-10-13 19:15:22,851 INFO L109 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2019-10-13 19:15:22,865 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:15:22,871 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:15:22,881 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:15:22,902 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:15:22,903 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:15:22,903 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:15:22,903 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:15:22,903 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:15:22,903 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:15:22,904 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:15:22,904 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:15:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-13 19:15:22,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 19:15:22,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:22,925 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:22,927 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:22,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-10-13 19:15:22,941 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:22,941 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833565966] [2019-10-13 19:15:22,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:22,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:22,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:23,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:23,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:23,160 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833565966] [2019-10-13 19:15:23,163 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:15:23,164 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:15:23,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142607796] [2019-10-13 19:15:23,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:15:23,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:15:23,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:23,200 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-13 19:15:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:23,259 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-13 19:15:23,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:15:23,261 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-13 19:15:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:23,269 INFO L225 Difference]: With dead ends: 29 [2019-10-13 19:15:23,269 INFO L226 Difference]: Without dead ends: 12 [2019-10-13 19:15:23,272 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:15:23,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-13 19:15:23,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-13 19:15:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-13 19:15:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-13 19:15:23,305 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-13 19:15:23,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:23,306 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-13 19:15:23,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:15:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-13 19:15:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:15:23,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:23,307 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:23,308 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:23,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:23,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-10-13 19:15:23,309 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:23,309 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518486548] [2019-10-13 19:15:23,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:23,309 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:23,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:23,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518486548] [2019-10-13 19:15:23,415 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218003324] [2019-10-13 19:15:23,416 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 [2019-10-13 19:15:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:23,448 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 19:15:23,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:23,511 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:23,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-13 19:15:23,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768896753] [2019-10-13 19:15:23,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:15:23,514 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:15:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:15:23,515 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-10-13 19:15:23,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:23,545 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-13 19:15:23,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:15:23,545 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-10-13 19:15:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:23,546 INFO L225 Difference]: With dead ends: 18 [2019-10-13 19:15:23,546 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 19:15:23,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:15:23,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 19:15:23,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 19:15:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 19:15:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 19:15:23,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-13 19:15:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:23,552 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 19:15:23,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:15:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 19:15:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 19:15:23,554 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:23,554 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:23,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:23,763 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:23,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-10-13 19:15:23,764 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:23,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31865994] [2019-10-13 19:15:23,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:23,765 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:23,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:23,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:23,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31865994] [2019-10-13 19:15:23,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562856945] [2019-10-13 19:15:23,890 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 [2019-10-13 19:15:23,934 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:15:23,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:23,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 19:15:23,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:23,972 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:23,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-10-13 19:15:23,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741871642] [2019-10-13 19:15:23,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:15:23,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:23,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:15:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:15:23,975 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-13 19:15:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:24,010 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-13 19:15:24,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:15:24,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-13 19:15:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:24,012 INFO L225 Difference]: With dead ends: 19 [2019-10-13 19:15:24,012 INFO L226 Difference]: Without dead ends: 14 [2019-10-13 19:15:24,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:15:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-13 19:15:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-13 19:15:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-13 19:15:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-13 19:15:24,018 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-13 19:15:24,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:24,018 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-13 19:15:24,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:15:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-13 19:15:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:15:24,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:24,019 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:24,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:24,223 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2019-10-13 19:15:24,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:24,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894780353] [2019-10-13 19:15:24,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:24,225 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:24,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:24,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894780353] [2019-10-13 19:15:24,325 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174922448] [2019-10-13 19:15:24,326 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 [2019-10-13 19:15:24,355 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:15:24,355 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:24,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 19:15:24,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:24,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:24,382 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:24,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-10-13 19:15:24,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436358977] [2019-10-13 19:15:24,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:15:24,383 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:15:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:15:24,384 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2019-10-13 19:15:24,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:24,418 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-13 19:15:24,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:15:24,418 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-10-13 19:15:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:24,419 INFO L225 Difference]: With dead ends: 20 [2019-10-13 19:15:24,419 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 19:15:24,420 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:15:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 19:15:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 19:15:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 19:15:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-13 19:15:24,425 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-13 19:15:24,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:24,425 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-13 19:15:24,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:15:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-13 19:15:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:15:24,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:24,426 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:24,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:24,630 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:24,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2019-10-13 19:15:24,632 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:24,634 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725988122] [2019-10-13 19:15:24,634 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:24,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:24,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:24,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:24,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725988122] [2019-10-13 19:15:24,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190101550] [2019-10-13 19:15:24,806 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 [2019-10-13 19:15:24,829 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:15:24,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:24,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 19:15:24,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:24,869 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:24,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-13 19:15:24,870 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522245322] [2019-10-13 19:15:24,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:15:24,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:24,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:15:24,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:15:24,872 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2019-10-13 19:15:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:24,922 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-13 19:15:24,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:15:24,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2019-10-13 19:15:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:24,923 INFO L225 Difference]: With dead ends: 21 [2019-10-13 19:15:24,923 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 19:15:24,926 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:15:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 19:15:24,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 19:15:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 19:15:24,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-13 19:15:24,934 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-13 19:15:24,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:24,935 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-13 19:15:24,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:15:24,936 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-13 19:15:24,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:15:24,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:24,936 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:25,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:25,142 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:25,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:25,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2019-10-13 19:15:25,143 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:25,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114054130] [2019-10-13 19:15:25,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:15:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:25,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114054130] [2019-10-13 19:15:25,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065704220] [2019-10-13 19:15:25,283 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 [2019-10-13 19:15:25,310 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 19:15:25,311 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:15:25,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 19:15:25,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:15:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:15:25,344 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 19:15:25,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-13 19:15:25,344 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913871509] [2019-10-13 19:15:25,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:15:25,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:15:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:15:25,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:25,346 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 9 states. [2019-10-13 19:15:25,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:15:25,394 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-13 19:15:25,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:15:25,394 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2019-10-13 19:15:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:15:25,395 INFO L225 Difference]: With dead ends: 22 [2019-10-13 19:15:25,395 INFO L226 Difference]: Without dead ends: 17 [2019-10-13 19:15:25,396 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:15:25,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-13 19:15:25,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-13 19:15:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-13 19:15:25,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-13 19:15:25,400 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-13 19:15:25,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:15:25,400 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-13 19:15:25,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:15:25,401 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-13 19:15:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:15:25,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:15:25,401 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:15:25,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:15:25,603 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:15:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:15:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 6 times [2019-10-13 19:15:25,604 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:15:25,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920357073] [2019-10-13 19:15:25,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:15:25,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:15:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:15:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 19:15:25,648 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-13 19:15:25,648 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 19:15:25,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:15:25 BoogieIcfgContainer [2019-10-13 19:15:25,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:15:25,674 INFO L168 Benchmark]: Toolchain (without parser) took 3421.81 ms. Allocated memory was 145.8 MB in the beginning and 235.9 MB in the end (delta: 90.2 MB). Free memory was 103.8 MB in the beginning and 155.3 MB in the end (delta: -51.4 MB). Peak memory consumption was 38.7 MB. Max. memory is 7.1 GB. [2019-10-13 19:15:25,674 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-13 19:15:25,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.69 ms. Allocated memory is still 145.8 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-10-13 19:15:25,676 INFO L168 Benchmark]: Boogie Preprocessor took 115.54 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 94.3 MB in the beginning and 182.1 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-10-13 19:15:25,677 INFO L168 Benchmark]: RCFGBuilder took 225.77 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 171.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-10-13 19:15:25,678 INFO L168 Benchmark]: TraceAbstraction took 2832.34 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 171.2 MB in the beginning and 155.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. [2019-10-13 19:15:25,681 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.69 ms. Allocated memory is still 145.8 MB. Free memory was 103.6 MB in the beginning and 94.3 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.54 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 94.3 MB in the beginning and 182.1 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 225.77 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 171.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2832.34 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 171.2 MB in the beginning and 155.3 MB in the end (delta: 16.0 MB). Peak memory consumption was 48.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L11] unsigned int x = 0; [L12] unsigned int y = 1; VAL [x=0, y=1] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=1, y=2] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=2, y=4] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=3, y=8] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=4, y=16] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=5, y=32] [L14] COND TRUE x < 6 [L15] x++ [L16] y *= 2 VAL [x=6, y=64] [L14] COND FALSE !(x < 6) VAL [x=6, y=64] [L19] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. Result: UNSAFE, OverallTime: 2.7s, OverallIterations: 7, TraceHistogramMax: 6, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 0 SDslu, 190 SDs, 0 SdLazy, 137 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s 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, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 129 ConstructedInterpolants, 0 QuantifiedInterpolants, 4835 SizeOfPredicates, 5 NumberOfNonLiveVariables, 195 ConjunctsInSsa, 45 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...