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/Problem17_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 21:29:14,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 21:29:14,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 21:29:14,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 21:29:14,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 21:29:14,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 21:29:14,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 21:29:14,410 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 [2019-09-09 21:29:14,424 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 21:29:14,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 21:29:14,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 21:29:14,425 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 21:29:14,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 21:29:14,426 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 21:29:14,426 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 21:29:14,426 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 21:29:14,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 21:29:14,427 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 21:29:14,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 21:29:14,427 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 21:29:14,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 21:29:14,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 21:29:14,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 21:29:14,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 21:29:14,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 21:29:14,429 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 21:29:14,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 21:29:14,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 21:29:14,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 21:29:14,429 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 21:29:14,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 21:29:14,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 21:29:14,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 21:29:14,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 21:29:14,431 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 21:29:14,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 21:29:14,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 21:29:14,431 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 21:29:14,461 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 21:29:14,474 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 21:29:14,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 21:29:14,483 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 21:29:14,484 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 21:29:14,485 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label40.c [2019-09-09 21:29:14,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5fc4670/596cd0f22d2544c1bf87becba184974b/FLAG31bc23c01 [2019-09-09 21:29:15,275 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 21:29:15,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label40.c [2019-09-09 21:29:15,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5fc4670/596cd0f22d2544c1bf87becba184974b/FLAG31bc23c01 [2019-09-09 21:29:15,400 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f5fc4670/596cd0f22d2544c1bf87becba184974b [2019-09-09 21:29:15,414 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 21:29:15,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 21:29:15,418 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 21:29:15,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 21:29:15,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 21:29:15,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:29:15" (1/1) ... [2019-09-09 21:29:15,427 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f7e5387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:15, skipping insertion in model container [2019-09-09 21:29:15,427 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 09:29:15" (1/1) ... [2019-09-09 21:29:15,435 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 21:29:15,548 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 21:29:16,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:29:16,619 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 21:29:17,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 21:29:17,103 INFO L192 MainTranslator]: Completed translation [2019-09-09 21:29:17,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17 WrapperNode [2019-09-09 21:29:17,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 21:29:17,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 21:29:17,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 21:29:17,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 21:29:17,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (1/1) ... [2019-09-09 21:29:17,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (1/1) ... [2019-09-09 21:29:17,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (1/1) ... [2019-09-09 21:29:17,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (1/1) ... [2019-09-09 21:29:17,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (1/1) ... [2019-09-09 21:29:17,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (1/1) ... [2019-09-09 21:29:17,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (1/1) ... [2019-09-09 21:29:17,392 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 21:29:17,393 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 21:29:17,393 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 21:29:17,393 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 21:29:17,394 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (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 [2019-09-09 21:29:17,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 21:29:17,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 21:29:17,467 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 21:29:17,467 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 21:29:17,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 21:29:17,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 21:29:17,468 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 21:29:17,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 21:29:17,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 21:29:17,468 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 21:29:17,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 21:29:17,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 21:29:17,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 21:29:21,234 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 21:29:21,235 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 21:29:21,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:29:21 BoogieIcfgContainer [2019-09-09 21:29:21,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 21:29:21,241 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 21:29:21,241 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 21:29:21,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 21:29:21,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 09:29:15" (1/3) ... [2019-09-09 21:29:21,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61beb215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:29:21, skipping insertion in model container [2019-09-09 21:29:21,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 09:29:17" (2/3) ... [2019-09-09 21:29:21,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61beb215 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 09:29:21, skipping insertion in model container [2019-09-09 21:29:21,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 09:29:21" (3/3) ... [2019-09-09 21:29:21,256 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label40.c [2019-09-09 21:29:21,270 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 21:29:21,283 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 21:29:21,301 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 21:29:21,331 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 21:29:21,331 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 21:29:21,332 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 21:29:21,332 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 21:29:21,332 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 21:29:21,332 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 21:29:21,332 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 21:29:21,332 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 21:29:21,367 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-09-09 21:29:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-09 21:29:21,377 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:29:21,378 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 21:29:21,380 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:29:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:29:21,386 INFO L82 PathProgramCache]: Analyzing trace with hash -928574159, now seen corresponding path program 1 times [2019-09-09 21:29:21,388 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:29:21,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:21,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:29:21,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:21,430 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:29:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:29:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:29:21,731 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:29:21,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:29:21,732 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:29:21,738 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:29:21,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:29:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:29:21,760 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 4 states. [2019-09-09 21:29:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:29:28,251 INFO L93 Difference]: Finished difference Result 1524 states and 2209 transitions. [2019-09-09 21:29:28,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:29:28,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2019-09-09 21:29:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:29:28,294 INFO L225 Difference]: With dead ends: 1524 [2019-09-09 21:29:28,295 INFO L226 Difference]: Without dead ends: 1439 [2019-09-09 21:29:28,298 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:29:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2019-09-09 21:29:28,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 981. [2019-09-09 21:29:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2019-09-09 21:29:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1512 transitions. [2019-09-09 21:29:28,434 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1512 transitions. Word has length 28 [2019-09-09 21:29:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:29:28,434 INFO L475 AbstractCegarLoop]: Abstraction has 981 states and 1512 transitions. [2019-09-09 21:29:28,435 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:29:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1512 transitions. [2019-09-09 21:29:28,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-09-09 21:29:28,440 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:29:28,440 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 21:29:28,441 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:29:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:29:28,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1682157028, now seen corresponding path program 1 times [2019-09-09 21:29:28,441 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:29:28,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:28,443 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:29:28,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:28,443 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:29:28,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:29:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:29:28,607 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:29:28,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 21:29:28,607 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:29:28,609 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 21:29:28,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 21:29:28,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 21:29:28,610 INFO L87 Difference]: Start difference. First operand 981 states and 1512 transitions. Second operand 5 states. [2019-09-09 21:29:34,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:29:34,713 INFO L93 Difference]: Finished difference Result 1914 states and 2730 transitions. [2019-09-09 21:29:34,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:29:34,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-09-09 21:29:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:29:34,727 INFO L225 Difference]: With dead ends: 1914 [2019-09-09 21:29:34,727 INFO L226 Difference]: Without dead ends: 1914 [2019-09-09 21:29:34,728 INFO L628 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 [2019-09-09 21:29:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2019-09-09 21:29:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1890. [2019-09-09 21:29:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2019-09-09 21:29:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2682 transitions. [2019-09-09 21:29:34,789 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2682 transitions. Word has length 99 [2019-09-09 21:29:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:29:34,789 INFO L475 AbstractCegarLoop]: Abstraction has 1890 states and 2682 transitions. [2019-09-09 21:29:34,789 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 21:29:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2682 transitions. [2019-09-09 21:29:34,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-09-09 21:29:34,793 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:29:34,793 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 21:29:34,794 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:29:34,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:29:34,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1028514536, now seen corresponding path program 1 times [2019-09-09 21:29:34,794 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:29:34,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:34,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:29:34,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:34,796 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:29:34,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:29:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:29:34,916 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:29:34,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:29:34,917 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:29:34,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:29:34,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:29:34,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:29:34,919 INFO L87 Difference]: Start difference. First operand 1890 states and 2682 transitions. Second operand 4 states. [2019-09-09 21:29:41,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:29:41,961 INFO L93 Difference]: Finished difference Result 3672 states and 5056 transitions. [2019-09-09 21:29:41,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:29:41,963 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2019-09-09 21:29:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:29:41,986 INFO L225 Difference]: With dead ends: 3672 [2019-09-09 21:29:41,986 INFO L226 Difference]: Without dead ends: 3672 [2019-09-09 21:29:41,987 INFO L628 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 [2019-09-09 21:29:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3672 states. [2019-09-09 21:29:42,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3672 to 3669. [2019-09-09 21:29:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3669 states. [2019-09-09 21:29:42,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3669 states to 3669 states and 5050 transitions. [2019-09-09 21:29:42,098 INFO L78 Accepts]: Start accepts. Automaton has 3669 states and 5050 transitions. Word has length 102 [2019-09-09 21:29:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:29:42,099 INFO L475 AbstractCegarLoop]: Abstraction has 3669 states and 5050 transitions. [2019-09-09 21:29:42,100 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:29:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3669 states and 5050 transitions. [2019-09-09 21:29:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-09-09 21:29:42,102 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:29:42,102 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 21:29:42,102 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:29:42,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:29:42,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1990358004, now seen corresponding path program 1 times [2019-09-09 21:29:42,103 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:29:42,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:42,104 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:29:42,104 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:42,104 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:29:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:29:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:29:42,223 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:29:42,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 21:29:42,223 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:29:42,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 21:29:42,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 21:29:42,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 21:29:42,225 INFO L87 Difference]: Start difference. First operand 3669 states and 5050 transitions. Second operand 6 states. [2019-09-09 21:29:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:29:48,522 INFO L93 Difference]: Finished difference Result 5511 states and 6723 transitions. [2019-09-09 21:29:48,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 21:29:48,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-09-09 21:29:48,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:29:48,561 INFO L225 Difference]: With dead ends: 5511 [2019-09-09 21:29:48,561 INFO L226 Difference]: Without dead ends: 5511 [2019-09-09 21:29:48,562 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 21:29:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2019-09-09 21:29:48,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5481. [2019-09-09 21:29:48,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5481 states. [2019-09-09 21:29:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 6602 transitions. [2019-09-09 21:29:48,741 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 6602 transitions. Word has length 107 [2019-09-09 21:29:48,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:29:48,743 INFO L475 AbstractCegarLoop]: Abstraction has 5481 states and 6602 transitions. [2019-09-09 21:29:48,744 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 21:29:48,744 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 6602 transitions. [2019-09-09 21:29:48,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-09-09 21:29:48,760 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:29:48,761 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 21:29:48,761 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:29:48,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:29:48,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1158770092, now seen corresponding path program 1 times [2019-09-09 21:29:48,762 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:29:48,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:48,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:29:48,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:48,764 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:29:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:29:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-09-09 21:29:48,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 21:29:48,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 21:29:48,956 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:29:48,957 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 21:29:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 21:29:48,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 21:29:48,958 INFO L87 Difference]: Start difference. First operand 5481 states and 6602 transitions. Second operand 4 states. [2019-09-09 21:29:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 21:29:54,169 INFO L93 Difference]: Finished difference Result 16057 states and 18573 transitions. [2019-09-09 21:29:54,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 21:29:54,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 201 [2019-09-09 21:29:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 21:29:54,239 INFO L225 Difference]: With dead ends: 16057 [2019-09-09 21:29:54,240 INFO L226 Difference]: Without dead ends: 16057 [2019-09-09 21:29:54,240 INFO L628 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 [2019-09-09 21:29:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16057 states. [2019-09-09 21:29:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16057 to 13451. [2019-09-09 21:29:54,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13451 states. [2019-09-09 21:29:54,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13451 states to 13451 states and 15868 transitions. [2019-09-09 21:29:54,561 INFO L78 Accepts]: Start accepts. Automaton has 13451 states and 15868 transitions. Word has length 201 [2019-09-09 21:29:54,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 21:29:54,562 INFO L475 AbstractCegarLoop]: Abstraction has 13451 states and 15868 transitions. [2019-09-09 21:29:54,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 21:29:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 13451 states and 15868 transitions. [2019-09-09 21:29:54,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-09-09 21:29:54,566 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 21:29:54,566 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-09-09 21:29:54,566 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 21:29:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:29:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1318948626, now seen corresponding path program 1 times [2019-09-09 21:29:54,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 21:29:54,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:54,570 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 21:29:54,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 21:29:54,570 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 21:29:54,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 21:29:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 38 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 21:29:54,850 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 21:29:54,850 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 21:29:54,851 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 212 with the following transitions: [2019-09-09 21:29:54,854 INFO L207 CegarAbsIntRunner]: [0], [1], [711], [718], [726], [734], [742], [750], [758], [766], [774], [782], [790], [798], [806], [814], [822], [830], [838], [842], [844], [847], [855], [863], [871], [879], [887], [895], [903], [911], [919], [927], [935], [943], [951], [959], [967], [975], [983], [991], [999], [1007], [1015], [1023], [1031], [1039], [1047], [1055], [1063], [1071], [1079], [1087], [1095], [1103], [1111], [1119], [1127], [1135], [1143], [1151], [1159], [1167], [1175], [1183], [1191], [1199], [1204], [1208], [1212], [1216], [1220], [1223], [1224], [1228], [1232], [1236], [1240], [1244], [1255], [1259], [1263], [1267], [1271], [1275], [1279], [1283], [1287], [1291], [1295], [1299], [1303], [1307], [1318], [1322], [1326], [1330], [1334], [1345], [1349], [1353], [1357], [1361], [1365], [1369], [1373], [1377], [1381], [1384], [2279], [2283], [2292], [2296], [2298], [2305], [2306], [2307], [2309], [2310] [2019-09-09 21:29:54,932 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 21:29:54,932 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 21:29:58,915 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-09 21:30:07,776 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 21:30:07,779 INFO L272 AbstractInterpreter]: Visited 117 different actions 229 times. Merged at 4 different actions 5 times. Never widened. Performed 460 root evaluator evaluations with a maximum evaluation depth of 15. Performed 460 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 21:30:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 21:30:07,782 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 21:30:12,640 INFO L227 lantSequenceWeakener]: Weakened 208 states. On average, predicates are now at 75.13% of their original sizes. [2019-09-09 21:30:12,640 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 21:30:12,750 INFO L420 sIntCurrentIteration]: We unified 210 AI predicates to 210 [2019-09-09 21:30:12,751 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 21:30:12,752 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 21:30:12,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [8] total 18 [2019-09-09 21:30:12,752 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 21:30:12,753 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-09 21:30:12,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-09 21:30:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-09-09 21:30:12,754 INFO L87 Difference]: Start difference. First operand 13451 states and 15868 transitions. Second operand 12 states.