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/eca-rers2012/Problem11_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:48:36,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:48:36,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:48:36,103 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:48:36,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 19:48:36,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 19:48:36,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 19:48:36,136 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 [2019-10-02 19:48:36,162 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:48:36,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:48:36,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:48:36,164 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:48:36,164 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:48:36,164 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:48:36,165 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:48:36,165 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:48:36,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:48:36,165 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:48:36,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:48:36,167 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:48:36,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:48:36,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:48:36,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:48:36,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:48:36,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:48:36,168 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:48:36,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:48:36,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:48:36,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:48:36,169 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:48:36,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:48:36,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:48:36,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:48:36,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:48:36,170 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:48:36,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:48:36,171 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:48:36,171 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:48:36,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:48:36,225 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:48:36,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:48:36,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:48:36,231 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:48:36,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label36.c [2019-10-02 19:48:36,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d4fafcd4/f02e60357a0b4a1397f69fe2ce4f799c/FLAG8c241ee7d [2019-10-02 19:48:36,857 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:48:36,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label36.c [2019-10-02 19:48:36,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d4fafcd4/f02e60357a0b4a1397f69fe2ce4f799c/FLAG8c241ee7d [2019-10-02 19:48:37,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d4fafcd4/f02e60357a0b4a1397f69fe2ce4f799c [2019-10-02 19:48:37,164 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:48:37,166 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:48:37,167 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:48:37,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:48:37,170 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:48:37,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:48:37" (1/1) ... [2019-10-02 19:48:37,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2837cd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:37, skipping insertion in model container [2019-10-02 19:48:37,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:48:37" (1/1) ... [2019-10-02 19:48:37,182 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:48:37,244 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:48:37,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:48:37,912 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:48:38,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:48:38,103 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:48:38,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38 WrapperNode [2019-10-02 19:48:38,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:48:38,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:48:38,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:48:38,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:48:38,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (1/1) ... [2019-10-02 19:48:38,122 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (1/1) ... [2019-10-02 19:48:38,159 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (1/1) ... [2019-10-02 19:48:38,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (1/1) ... [2019-10-02 19:48:38,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (1/1) ... [2019-10-02 19:48:38,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (1/1) ... [2019-10-02 19:48:38,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (1/1) ... [2019-10-02 19:48:38,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:48:38,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:48:38,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:48:38,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:48:38,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (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 [2019-10-02 19:48:38,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:48:38,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:48:38,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:48:38,354 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:48:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:48:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:48:38,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:48:38,355 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:48:38,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:48:38,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:48:38,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:48:40,117 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:48:40,118 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:48:40,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:48:40 BoogieIcfgContainer [2019-10-02 19:48:40,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:48:40,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:48:40,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:48:40,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:48:40,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:48:37" (1/3) ... [2019-10-02 19:48:40,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3369a7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:48:40, skipping insertion in model container [2019-10-02 19:48:40,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:48:38" (2/3) ... [2019-10-02 19:48:40,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3369a7c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:48:40, skipping insertion in model container [2019-10-02 19:48:40,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:48:40" (3/3) ... [2019-10-02 19:48:40,136 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label36.c [2019-10-02 19:48:40,149 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:48:40,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:48:40,185 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:48:40,237 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:48:40,238 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:48:40,238 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:48:40,239 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:48:40,239 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:48:40,240 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:48:40,240 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:48:40,240 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:48:40,288 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:48:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-02 19:48:40,302 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:40,303 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:48:40,306 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1754233962, now seen corresponding path program 1 times [2019-10-02 19:48:40,315 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:40,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:40,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:40,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:40,382 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:48:40,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:48:40,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:48:40,697 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:48:40,703 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:48:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:48:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:48:40,724 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-02 19:48:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:48:42,194 INFO L93 Difference]: Finished difference Result 493 states and 799 transitions. [2019-10-02 19:48:42,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:48:42,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-02 19:48:42,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:48:42,228 INFO L225 Difference]: With dead ends: 493 [2019-10-02 19:48:42,228 INFO L226 Difference]: Without dead ends: 425 [2019-10-02 19:48:42,231 INFO L640 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 [2019-10-02 19:48:42,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-02 19:48:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-02 19:48:42,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-02 19:48:42,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-10-02 19:48:42,324 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 19 [2019-10-02 19:48:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:48:42,325 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-10-02 19:48:42,325 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:48:42,325 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-10-02 19:48:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-02 19:48:42,329 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:42,330 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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] [2019-10-02 19:48:42,330 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:42,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2108634866, now seen corresponding path program 1 times [2019-10-02 19:48:42,331 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:42,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:42,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:42,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:42,333 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:42,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:48:42,591 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:48:42,591 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:48:42,591 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:48:42,593 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:48:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:48:42,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:48:42,596 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 4 states. [2019-10-02 19:48:44,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:48:44,329 INFO L93 Difference]: Finished difference Result 1181 states and 1861 transitions. [2019-10-02 19:48:44,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:48:44,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-10-02 19:48:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:48:44,340 INFO L225 Difference]: With dead ends: 1181 [2019-10-02 19:48:44,340 INFO L226 Difference]: Without dead ends: 1181 [2019-10-02 19:48:44,341 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:48:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2019-10-02 19:48:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 799. [2019-10-02 19:48:44,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2019-10-02 19:48:44,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1259 transitions. [2019-10-02 19:48:44,394 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1259 transitions. Word has length 93 [2019-10-02 19:48:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:48:44,395 INFO L475 AbstractCegarLoop]: Abstraction has 799 states and 1259 transitions. [2019-10-02 19:48:44,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:48:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1259 transitions. [2019-10-02 19:48:44,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-02 19:48:44,398 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:44,399 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:48:44,399 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:44,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:44,399 INFO L82 PathProgramCache]: Analyzing trace with hash -625871230, now seen corresponding path program 1 times [2019-10-02 19:48:44,400 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:44,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:44,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:44,402 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:48:44,537 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:48:44,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:48:44,538 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:48:44,538 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:48:44,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:48:44,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:48:44,539 INFO L87 Difference]: Start difference. First operand 799 states and 1259 transitions. Second operand 6 states. [2019-10-02 19:48:46,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:48:46,372 INFO L93 Difference]: Finished difference Result 1417 states and 2096 transitions. [2019-10-02 19:48:46,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-02 19:48:46,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-10-02 19:48:46,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:48:46,391 INFO L225 Difference]: With dead ends: 1417 [2019-10-02 19:48:46,392 INFO L226 Difference]: Without dead ends: 1417 [2019-10-02 19:48:46,392 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-02 19:48:46,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1417 states. [2019-10-02 19:48:46,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1417 to 1204. [2019-10-02 19:48:46,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2019-10-02 19:48:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1796 transitions. [2019-10-02 19:48:46,478 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1796 transitions. Word has length 103 [2019-10-02 19:48:46,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:48:46,488 INFO L475 AbstractCegarLoop]: Abstraction has 1204 states and 1796 transitions. [2019-10-02 19:48:46,488 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:48:46,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1796 transitions. [2019-10-02 19:48:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-02 19:48:46,500 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:46,500 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 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, 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, 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, 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, 1, 1, 1] [2019-10-02 19:48:46,500 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:46,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:46,501 INFO L82 PathProgramCache]: Analyzing trace with hash -79682620, now seen corresponding path program 1 times [2019-10-02 19:48:46,501 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:46,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:46,504 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:46,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:46,504 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:46,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:48:46,725 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:48:46,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:48:46,725 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:48:46,727 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:48:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:48:46,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:48:46,727 INFO L87 Difference]: Start difference. First operand 1204 states and 1796 transitions. Second operand 6 states. [2019-10-02 19:48:48,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:48:48,525 INFO L93 Difference]: Finished difference Result 2451 states and 3529 transitions. [2019-10-02 19:48:48,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-02 19:48:48,528 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-10-02 19:48:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:48:48,550 INFO L225 Difference]: With dead ends: 2451 [2019-10-02 19:48:48,550 INFO L226 Difference]: Without dead ends: 2451 [2019-10-02 19:48:48,551 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-02 19:48:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2019-10-02 19:48:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1627. [2019-10-02 19:48:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1627 states. [2019-10-02 19:48:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1627 states to 1627 states and 2349 transitions. [2019-10-02 19:48:48,655 INFO L78 Accepts]: Start accepts. Automaton has 1627 states and 2349 transitions. Word has length 121 [2019-10-02 19:48:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:48:48,657 INFO L475 AbstractCegarLoop]: Abstraction has 1627 states and 2349 transitions. [2019-10-02 19:48:48,657 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:48:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1627 states and 2349 transitions. [2019-10-02 19:48:48,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-02 19:48:48,666 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:48:48,667 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2019-10-02 19:48:48,667 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:48:48,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:48:48,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1401869634, now seen corresponding path program 1 times [2019-10-02 19:48:48,668 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:48:48,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:48,669 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:48:48,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:48:48,669 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:48:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:48:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 24 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 19:48:48,919 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:48:48,919 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:48:48,920 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 176 with the following transitions: [2019-10-02 19:48:48,923 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [61], [63], [66], [74], [82], [90], [98], [106], [114], [122], [130], [138], [146], [154], [162], [170], [178], [186], [194], [202], [210], [218], [226], [234], [242], [250], [258], [266], [274], [282], [290], [298], [306], [314], [322], [330], [338], [346], [354], [362], [370], [378], [386], [394], [402], [410], [418], [426], [434], [442], [450], [458], [466], [474], [482], [490], [495], [499], [503], [506], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [554], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:48:49,018 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:48:49,019 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:49:54,661 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:49:54,663 INFO L272 AbstractInterpreter]: Visited 89 different actions 89 times. Never merged. Never widened. Performed 227 root evaluator evaluations with a maximum evaluation depth of 17. Performed 227 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:49:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:49:54,667 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:51:03,202 INFO L227 lantSequenceWeakener]: Weakened 156 states. On average, predicates are now at 73.25% of their original sizes. [2019-10-02 19:51:03,203 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:51:03,307 INFO L420 sIntCurrentIteration]: We unified 174 AI predicates to 174 [2019-10-02 19:51:03,307 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:51:03,308 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:51:03,308 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 19:51:03,308 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:51:03,309 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:51:03,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:51:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:51:03,310 INFO L87 Difference]: Start difference. First operand 1627 states and 2349 transitions. Second operand 10 states.