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/Problem18_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:49:20,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:49:20,503 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:49:20,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 22:49:20,584 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 22:49:20,620 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:49:20,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:49:20,624 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:49:20,624 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:49:20,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:49:20,625 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:49:20,625 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:49:20,625 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:49:20,625 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:49:20,626 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:49:20,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:49:20,626 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:49:20,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:49:20,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:49:20,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:49:20,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:49:20,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:49:20,628 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:49:20,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:49:20,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:49:20,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:49:20,631 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:49:20,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:49:20,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:49:20,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:49:20,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:49:20,632 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:49:20,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:49:20,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:49:20,633 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:49:20,681 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:49:20,698 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:49:20,701 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:49:20,703 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:49:20,703 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:49:20,704 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-09-09 22:49:20,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980f851a0/fde8c181a288462f85596f41cee2db9e/FLAGcc37a5492 [2019-09-09 22:49:21,453 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:49:21,454 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label59.c [2019-09-09 22:49:21,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980f851a0/fde8c181a288462f85596f41cee2db9e/FLAGcc37a5492 [2019-09-09 22:49:21,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980f851a0/fde8c181a288462f85596f41cee2db9e [2019-09-09 22:49:21,608 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:49:21,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:49:21,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:49:21,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:49:21,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:49:21,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:49:21" (1/1) ... [2019-09-09 22:49:21,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c157ce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:21, skipping insertion in model container [2019-09-09 22:49:21,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:49:21" (1/1) ... [2019-09-09 22:49:21,629 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:49:21,766 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:49:22,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:49:22,835 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:49:23,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:49:23,409 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:49:23,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23 WrapperNode [2019-09-09 22:49:23,410 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:49:23,411 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:49:23,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:49:23,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:49:23,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (1/1) ... [2019-09-09 22:49:23,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (1/1) ... [2019-09-09 22:49:23,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (1/1) ... [2019-09-09 22:49:23,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (1/1) ... [2019-09-09 22:49:23,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (1/1) ... [2019-09-09 22:49:23,647 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (1/1) ... [2019-09-09 22:49:23,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (1/1) ... [2019-09-09 22:49:23,709 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:49:23,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:49:23,710 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:49:23,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:49:23,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (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 22:49:23,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:49:23,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:49:23,776 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:49:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:49:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:49:23,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:49:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:49:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:49:23,777 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:49:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:49:23,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:49:23,779 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:49:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:49:23,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:49:23,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:49:27,286 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:49:27,287 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:49:27,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:49:27 BoogieIcfgContainer [2019-09-09 22:49:27,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:49:27,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:49:27,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:49:27,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:49:27,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:49:21" (1/3) ... [2019-09-09 22:49:27,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206ff5d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:49:27, skipping insertion in model container [2019-09-09 22:49:27,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:49:23" (2/3) ... [2019-09-09 22:49:27,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206ff5d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:49:27, skipping insertion in model container [2019-09-09 22:49:27,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:49:27" (3/3) ... [2019-09-09 22:49:27,308 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label59.c [2019-09-09 22:49:27,321 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:49:27,332 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:49:27,349 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:49:27,384 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:49:27,384 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:49:27,384 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:49:27,384 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:49:27,384 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:49:27,384 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:49:27,385 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:49:27,385 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:49:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:49:27,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-09 22:49:27,443 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:49:27,444 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:49:27,446 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:49:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:49:27,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1601296886, now seen corresponding path program 1 times [2019-09-09 22:49:27,451 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:49:27,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:27,489 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:49:27,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:27,489 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:49:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:49:27,722 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 22:49:27,724 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:49:27,724 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:49:27,724 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:49:27,730 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:49:27,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:49:27,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:49:27,748 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:49:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:49:32,205 INFO L93 Difference]: Finished difference Result 1480 states and 2746 transitions. [2019-09-09 22:49:32,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:49:32,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-09-09 22:49:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:49:32,236 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:49:32,236 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:49:32,238 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:49:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:49:32,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:49:32,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:49:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-09-09 22:49:32,366 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 43 [2019-09-09 22:49:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:49:32,367 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-09-09 22:49:32,367 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:49:32,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-09-09 22:49:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 22:49:32,372 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:49:32,373 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, 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] [2019-09-09 22:49:32,373 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:49:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:49:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1229064497, now seen corresponding path program 1 times [2019-09-09 22:49:32,374 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:49:32,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:32,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:49:32,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:32,375 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:49:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:49:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:49:32,656 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:49:32,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:49:32,656 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:49:32,659 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:49:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:49:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:49:32,660 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 5 states. [2019-09-09 22:49:38,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:49:38,056 INFO L93 Difference]: Finished difference Result 2885 states and 4979 transitions. [2019-09-09 22:49:38,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:49:38,057 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2019-09-09 22:49:38,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:49:38,074 INFO L225 Difference]: With dead ends: 2885 [2019-09-09 22:49:38,074 INFO L226 Difference]: Without dead ends: 2885 [2019-09-09 22:49:38,075 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 22:49:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-09-09 22:49:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2861. [2019-09-09 22:49:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2019-09-09 22:49:38,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4925 transitions. [2019-09-09 22:49:38,172 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4925 transitions. Word has length 112 [2019-09-09 22:49:38,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:49:38,173 INFO L475 AbstractCegarLoop]: Abstraction has 2861 states and 4925 transitions. [2019-09-09 22:49:38,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:49:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4925 transitions. [2019-09-09 22:49:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-09 22:49:38,177 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:49:38,177 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, 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] [2019-09-09 22:49:38,177 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:49:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:49:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash -25302418, now seen corresponding path program 1 times [2019-09-09 22:49:38,178 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:49:38,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:38,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:49:38,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:38,180 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:49:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:49:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:49:38,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:49:38,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:49:38,316 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:49:38,318 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:49:38,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:49:38,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:49:38,319 INFO L87 Difference]: Start difference. First operand 2861 states and 4925 transitions. Second operand 5 states. [2019-09-09 22:49:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:49:43,465 INFO L93 Difference]: Finished difference Result 4356 states and 6168 transitions. [2019-09-09 22:49:43,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:49:43,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 113 [2019-09-09 22:49:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:49:43,492 INFO L225 Difference]: With dead ends: 4356 [2019-09-09 22:49:43,493 INFO L226 Difference]: Without dead ends: 4356 [2019-09-09 22:49:43,493 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 22:49:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2019-09-09 22:49:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 4325. [2019-09-09 22:49:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4325 states. [2019-09-09 22:49:43,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4325 states to 4325 states and 6079 transitions. [2019-09-09 22:49:43,644 INFO L78 Accepts]: Start accepts. Automaton has 4325 states and 6079 transitions. Word has length 113 [2019-09-09 22:49:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:49:43,646 INFO L475 AbstractCegarLoop]: Abstraction has 4325 states and 6079 transitions. [2019-09-09 22:49:43,646 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:49:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4325 states and 6079 transitions. [2019-09-09 22:49:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-09 22:49:43,656 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:49:43,656 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, 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 22:49:43,657 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:49:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:49:43,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1998315758, now seen corresponding path program 1 times [2019-09-09 22:49:43,657 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:49:43,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:43,658 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:49:43,658 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:43,658 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:49:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:49:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:49:43,779 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:49:43,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 22:49:43,779 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:49:43,780 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 22:49:43,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 22:49:43,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 22:49:43,781 INFO L87 Difference]: Start difference. First operand 4325 states and 6079 transitions. Second operand 5 states. [2019-09-09 22:49:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:49:49,690 INFO L93 Difference]: Finished difference Result 8955 states and 11705 transitions. [2019-09-09 22:49:49,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 22:49:49,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 115 [2019-09-09 22:49:49,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:49:49,730 INFO L225 Difference]: With dead ends: 8955 [2019-09-09 22:49:49,730 INFO L226 Difference]: Without dead ends: 8955 [2019-09-09 22:49:49,731 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 22:49:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2019-09-09 22:49:49,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 8798. [2019-09-09 22:49:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8798 states. [2019-09-09 22:49:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 11426 transitions. [2019-09-09 22:49:49,990 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 11426 transitions. Word has length 115 [2019-09-09 22:49:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:49:49,990 INFO L475 AbstractCegarLoop]: Abstraction has 8798 states and 11426 transitions. [2019-09-09 22:49:49,990 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 22:49:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 11426 transitions. [2019-09-09 22:49:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-09-09 22:49:49,995 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:49:49,996 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, 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, 1, 1, 1] [2019-09-09 22:49:49,996 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:49:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:49:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2016787783, now seen corresponding path program 1 times [2019-09-09 22:49:49,997 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:49:49,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:49,998 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:49:49,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:49,998 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:49:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:49:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:49:50,163 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:49:50,163 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:49:50,163 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:49:50,164 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:49:50,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:49:50,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:49:50,165 INFO L87 Difference]: Start difference. First operand 8798 states and 11426 transitions. Second operand 3 states. [2019-09-09 22:49:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:49:54,077 INFO L93 Difference]: Finished difference Result 16620 states and 19932 transitions. [2019-09-09 22:49:54,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:49:54,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 140 [2019-09-09 22:49:54,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:49:54,142 INFO L225 Difference]: With dead ends: 16620 [2019-09-09 22:49:54,142 INFO L226 Difference]: Without dead ends: 16620 [2019-09-09 22:49:54,143 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:49:54,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16620 states. [2019-09-09 22:49:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16620 to 15908. [2019-09-09 22:49:54,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15908 states. [2019-09-09 22:49:54,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15908 states to 15908 states and 19164 transitions. [2019-09-09 22:49:54,581 INFO L78 Accepts]: Start accepts. Automaton has 15908 states and 19164 transitions. Word has length 140 [2019-09-09 22:49:54,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:49:54,583 INFO L475 AbstractCegarLoop]: Abstraction has 15908 states and 19164 transitions. [2019-09-09 22:49:54,583 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:49:54,583 INFO L276 IsEmpty]: Start isEmpty. Operand 15908 states and 19164 transitions. [2019-09-09 22:49:54,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-09 22:49:54,588 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:49:54,588 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:54,589 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:49:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:49:54,590 INFO L82 PathProgramCache]: Analyzing trace with hash 894224995, now seen corresponding path program 1 times [2019-09-09 22:49:54,590 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:49:54,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:54,595 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:49:54,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:49:54,595 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:49:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:49:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-09 22:49:54,780 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:49:54,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 22:49:54,781 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:49:54,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 22:49:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 22:49:54,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 22:49:54,783 INFO L87 Difference]: Start difference. First operand 15908 states and 19164 transitions. Second operand 4 states. [2019-09-09 22:50:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:50:01,709 INFO L93 Difference]: Finished difference Result 30163 states and 37304 transitions. [2019-09-09 22:50:01,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 22:50:01,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 218 [2019-09-09 22:50:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:50:01,805 INFO L225 Difference]: With dead ends: 30163 [2019-09-09 22:50:01,806 INFO L226 Difference]: Without dead ends: 30163 [2019-09-09 22:50:01,806 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 22:50:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30163 states. [2019-09-09 22:50:02,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30163 to 27348. [2019-09-09 22:50:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27348 states. [2019-09-09 22:50:02,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27348 states to 27348 states and 34021 transitions. [2019-09-09 22:50:02,313 INFO L78 Accepts]: Start accepts. Automaton has 27348 states and 34021 transitions. Word has length 218 [2019-09-09 22:50:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:50:02,316 INFO L475 AbstractCegarLoop]: Abstraction has 27348 states and 34021 transitions. [2019-09-09 22:50:02,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 22:50:02,316 INFO L276 IsEmpty]: Start isEmpty. Operand 27348 states and 34021 transitions. [2019-09-09 22:50:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-09-09 22:50:02,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:50:02,321 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:50:02,321 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:50:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:50:02,326 INFO L82 PathProgramCache]: Analyzing trace with hash 935572222, now seen corresponding path program 1 times [2019-09-09 22:50:02,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:50:02,327 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:50:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:50:02,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:50:02,329 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:50:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:50:02,488 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:50:02,489 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:50:02,489 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:50:02,490 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 222 with the following transitions: [2019-09-09 22:50:02,492 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1847], [1855], [1863], [1871], [1875], [1877], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2125], [2128], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2264], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:50:02,586 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:50:02,586 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:50:09,173 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:50:09,176 INFO L272 AbstractInterpreter]: Visited 111 different actions 111 times. Never merged. Never widened. Performed 261 root evaluator evaluations with a maximum evaluation depth of 13. Performed 261 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:50:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:50:09,180 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:50:14,159 INFO L227 lantSequenceWeakener]: Weakened 202 states. On average, predicates are now at 77.98% of their original sizes. [2019-09-09 22:50:14,160 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:50:14,254 INFO L420 sIntCurrentIteration]: We unified 220 AI predicates to 220 [2019-09-09 22:50:14,254 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:50:14,259 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:50:14,259 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-09-09 22:50:14,260 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:50:14,260 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-09 22:50:14,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-09 22:50:14,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-09-09 22:50:14,261 INFO L87 Difference]: Start difference. First operand 27348 states and 34021 transitions. Second operand 10 states. [2019-09-09 22:52:10,881 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.