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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:41,147 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:41,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:41,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:26:41,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:26:41,237 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:41,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:41,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:41,238 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:41,239 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:41,239 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:41,240 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:41,240 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:41,240 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:41,240 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:41,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:41,241 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:41,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:41,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:41,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:41,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:41,242 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:41,243 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:41,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:41,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:41,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:41,244 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:41,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:41,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:41,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:41,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:41,245 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:41,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:41,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:41,245 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:41,274 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:41,287 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:41,290 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:41,292 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:41,292 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:41,293 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c [2019-09-20 13:26:41,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dca701ae/50a7149ef0f4438a9c19486b6ec626c1/FLAG95a426786 [2019-09-20 13:26:41,768 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:41,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_1a.cil.c [2019-09-20 13:26:41,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dca701ae/50a7149ef0f4438a9c19486b6ec626c1/FLAG95a426786 [2019-09-20 13:26:42,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dca701ae/50a7149ef0f4438a9c19486b6ec626c1 [2019-09-20 13:26:42,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:42,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:42,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:42,161 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:42,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:42,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62df7d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42, skipping insertion in model container [2019-09-20 13:26:42,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,176 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:42,210 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:42,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:42,485 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:42,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:42,631 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:42,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42 WrapperNode [2019-09-20 13:26:42,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:42,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:42,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:42,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:42,654 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (1/1) ... [2019-09-20 13:26:42,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:42,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:42,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:42,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:42,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (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 [2019-09-20 13:26:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:42,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-20 13:26:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:26:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2019-09-20 13:26:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-09-20 13:26:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:43,145 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:43,146 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:26:43,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:43 BoogieIcfgContainer [2019-09-20 13:26:43,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:43,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:43,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:43,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:43,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:42" (1/3) ... [2019-09-20 13:26:43,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a28655f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:43, skipping insertion in model container [2019-09-20 13:26:43,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:42" (2/3) ... [2019-09-20 13:26:43,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a28655f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:43, skipping insertion in model container [2019-09-20 13:26:43,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:43" (3/3) ... [2019-09-20 13:26:43,162 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1a.cil.c [2019-09-20 13:26:43,173 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:43,181 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:43,204 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:43,228 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:43,228 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:43,228 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:43,228 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:43,228 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:43,229 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:43,229 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:43,229 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2019-09-20 13:26:43,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-09-20 13:26:43,256 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:43,257 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:43,260 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:43,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2008919768, now seen corresponding path program 1 times [2019-09-20 13:26:43,269 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:43,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:43,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:43,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:43,318 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:43,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:43,422 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:43,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:43,423 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:43,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:43,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:43,445 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2019-09-20 13:26:43,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:43,566 INFO L93 Difference]: Finished difference Result 91 states and 139 transitions. [2019-09-20 13:26:43,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:43,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-09-20 13:26:43,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:43,585 INFO L225 Difference]: With dead ends: 91 [2019-09-20 13:26:43,585 INFO L226 Difference]: Without dead ends: 83 [2019-09-20 13:26:43,590 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:43,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-20 13:26:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-20 13:26:43,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-20 13:26:43,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 126 transitions. [2019-09-20 13:26:43,667 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 126 transitions. Word has length 8 [2019-09-20 13:26:43,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:43,668 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 126 transitions. [2019-09-20 13:26:43,668 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:43,668 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 126 transitions. [2019-09-20 13:26:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:26:43,670 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:43,671 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:43,671 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:43,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454160, now seen corresponding path program 1 times [2019-09-20 13:26:43,674 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:43,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:43,681 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:43,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:43,681 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:26:43,738 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:43,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:43,738 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:43,740 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:43,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:43,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:43,741 INFO L87 Difference]: Start difference. First operand 83 states and 126 transitions. Second operand 3 states. [2019-09-20 13:26:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:43,831 INFO L93 Difference]: Finished difference Result 121 states and 184 transitions. [2019-09-20 13:26:43,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:43,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-20 13:26:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:43,834 INFO L225 Difference]: With dead ends: 121 [2019-09-20 13:26:43,834 INFO L226 Difference]: Without dead ends: 121 [2019-09-20 13:26:43,835 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-20 13:26:43,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2019-09-20 13:26:43,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-20 13:26:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 184 transitions. [2019-09-20 13:26:43,850 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 184 transitions. Word has length 13 [2019-09-20 13:26:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:43,850 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 184 transitions. [2019-09-20 13:26:43,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 184 transitions. [2019-09-20 13:26:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-20 13:26:43,852 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:43,852 INFO L407 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:43,853 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:43,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1216248382, now seen corresponding path program 1 times [2019-09-20 13:26:43,853 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:43,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:43,855 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:43,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:43,856 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-20 13:26:43,900 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:43,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:43,900 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:43,901 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:43,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:43,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:43,902 INFO L87 Difference]: Start difference. First operand 121 states and 184 transitions. Second operand 3 states. [2019-09-20 13:26:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:43,993 INFO L93 Difference]: Finished difference Result 159 states and 243 transitions. [2019-09-20 13:26:43,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:43,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-20 13:26:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:43,996 INFO L225 Difference]: With dead ends: 159 [2019-09-20 13:26:43,996 INFO L226 Difference]: Without dead ends: 159 [2019-09-20 13:26:43,997 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:43,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-20 13:26:44,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2019-09-20 13:26:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2019-09-20 13:26:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 243 transitions. [2019-09-20 13:26:44,010 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 243 transitions. Word has length 19 [2019-09-20 13:26:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:44,011 INFO L475 AbstractCegarLoop]: Abstraction has 159 states and 243 transitions. [2019-09-20 13:26:44,011 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 243 transitions. [2019-09-20 13:26:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 13:26:44,013 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:44,013 INFO L407 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:44,014 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:44,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1623728883, now seen corresponding path program 1 times [2019-09-20 13:26:44,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:44,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,016 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:44,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,016 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:44,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-20 13:26:44,076 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:44,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:44,076 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:44,077 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:44,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:44,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,078 INFO L87 Difference]: Start difference. First operand 159 states and 243 transitions. Second operand 3 states. [2019-09-20 13:26:44,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:44,220 INFO L93 Difference]: Finished difference Result 217 states and 300 transitions. [2019-09-20 13:26:44,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:44,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-09-20 13:26:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:44,225 INFO L225 Difference]: With dead ends: 217 [2019-09-20 13:26:44,225 INFO L226 Difference]: Without dead ends: 217 [2019-09-20 13:26:44,226 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2019-09-20 13:26:44,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 211. [2019-09-20 13:26:44,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2019-09-20 13:26:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 295 transitions. [2019-09-20 13:26:44,243 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 295 transitions. Word has length 34 [2019-09-20 13:26:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:44,243 INFO L475 AbstractCegarLoop]: Abstraction has 211 states and 295 transitions. [2019-09-20 13:26:44,243 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:44,244 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 295 transitions. [2019-09-20 13:26:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-20 13:26:44,246 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:44,246 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:44,247 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1694730092, now seen corresponding path program 1 times [2019-09-20 13:26:44,248 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:44,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:44,250 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,250 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-20 13:26:44,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:44,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:44,321 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:44,322 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:44,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:44,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,323 INFO L87 Difference]: Start difference. First operand 211 states and 295 transitions. Second operand 3 states. [2019-09-20 13:26:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:44,383 INFO L93 Difference]: Finished difference Result 264 states and 370 transitions. [2019-09-20 13:26:44,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:44,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-09-20 13:26:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:44,387 INFO L225 Difference]: With dead ends: 264 [2019-09-20 13:26:44,387 INFO L226 Difference]: Without dead ends: 264 [2019-09-20 13:26:44,388 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2019-09-20 13:26:44,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 262. [2019-09-20 13:26:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2019-09-20 13:26:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 369 transitions. [2019-09-20 13:26:44,413 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 369 transitions. Word has length 48 [2019-09-20 13:26:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:44,414 INFO L475 AbstractCegarLoop]: Abstraction has 262 states and 369 transitions. [2019-09-20 13:26:44,414 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 369 transitions. [2019-09-20 13:26:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-09-20 13:26:44,416 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:44,417 INFO L407 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:44,417 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash 365198397, now seen corresponding path program 1 times [2019-09-20 13:26:44,418 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:44,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:44,419 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,420 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-20 13:26:44,465 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:44,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:44,466 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:44,466 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,467 INFO L87 Difference]: Start difference. First operand 262 states and 369 transitions. Second operand 3 states. [2019-09-20 13:26:44,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:44,582 INFO L93 Difference]: Finished difference Result 270 states and 345 transitions. [2019-09-20 13:26:44,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:44,583 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 51 [2019-09-20 13:26:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:44,588 INFO L225 Difference]: With dead ends: 270 [2019-09-20 13:26:44,589 INFO L226 Difference]: Without dead ends: 192 [2019-09-20 13:26:44,589 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2019-09-20 13:26:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2019-09-20 13:26:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-20 13:26:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 248 transitions. [2019-09-20 13:26:44,603 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 248 transitions. Word has length 51 [2019-09-20 13:26:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:44,604 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 248 transitions. [2019-09-20 13:26:44,604 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 248 transitions. [2019-09-20 13:26:44,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-20 13:26:44,616 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:44,616 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:44,616 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:44,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:44,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1939547864, now seen corresponding path program 1 times [2019-09-20 13:26:44,617 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:44,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:44,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:44,619 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-20 13:26:44,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:44,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:44,727 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:44,728 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:44,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:44,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,728 INFO L87 Difference]: Start difference. First operand 189 states and 248 transitions. Second operand 3 states. [2019-09-20 13:26:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:44,740 INFO L93 Difference]: Finished difference Result 206 states and 260 transitions. [2019-09-20 13:26:44,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:44,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 79 [2019-09-20 13:26:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:44,741 INFO L225 Difference]: With dead ends: 206 [2019-09-20 13:26:44,741 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:44,741 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:44,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:44,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2019-09-20 13:26:44,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:44,743 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:44,743 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:44,743 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:44,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:44,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:44 BoogieIcfgContainer [2019-09-20 13:26:44,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:44,753 INFO L168 Benchmark]: Toolchain (without parser) took 2594.57 ms. Allocated memory was 134.7 MB in the beginning and 228.1 MB in the end (delta: 93.3 MB). Free memory was 90.5 MB in the beginning and 150.0 MB in the end (delta: -59.6 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:44,755 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 134.7 MB. Free memory was 108.7 MB in the beginning and 108.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:44,758 INFO L168 Benchmark]: CACSL2BoogieTranslator took 471.64 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 90.0 MB in the beginning and 175.8 MB in the end (delta: -85.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:44,759 INFO L168 Benchmark]: Boogie Preprocessor took 49.63 ms. Allocated memory is still 199.2 MB. Free memory was 175.8 MB in the beginning and 174.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:44,761 INFO L168 Benchmark]: RCFGBuilder took 461.67 ms. Allocated memory is still 199.2 MB. Free memory was 174.0 MB in the beginning and 155.2 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:44,762 INFO L168 Benchmark]: TraceAbstraction took 1601.50 ms. Allocated memory was 199.2 MB in the beginning and 228.1 MB in the end (delta: 28.8 MB). Free memory was 154.6 MB in the beginning and 150.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:44,772 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 134.7 MB. Free memory was 108.7 MB in the beginning and 108.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 471.64 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 90.0 MB in the beginning and 175.8 MB in the end (delta: -85.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.63 ms. Allocated memory is still 199.2 MB. Free memory was 175.8 MB in the beginning and 174.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 461.67 ms. Allocated memory is still 199.2 MB. Free memory was 174.0 MB in the beginning and 155.2 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1601.50 ms. Allocated memory was 199.2 MB in the beginning and 228.1 MB in the end (delta: 28.8 MB). Free memory was 154.6 MB in the beginning and 150.0 MB in the end (delta: 4.5 MB). Peak memory consumption was 33.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 216]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 50 locations, 1 error locations. SAFE Result, 1.5s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 457 SDtfs, 250 SDslu, 321 SDs, 0 SdLazy, 196 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=262occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 252 NumberOfCodeBlocks, 252 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 25301 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 202/202 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...