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_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:33:45,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:33:45,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:33:45,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:33:45,501 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 19:33:45,516 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:33:45,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:33:45,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:33:45,517 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:33:45,517 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:33:45,518 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:33:45,518 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:33:45,518 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:33:45,518 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:33:45,518 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:33:45,519 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:33:45,519 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:33:45,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:33:45,520 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:33:45,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:33:45,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:33:45,520 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:33:45,520 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:33:45,520 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:33:45,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:33:45,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:33:45,521 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:33:45,521 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:33:45,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:33:45,522 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:33:45,522 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:33:45,522 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:33:45,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:33:45,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:33:45,523 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:33:45,558 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:33:45,570 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:33:45,574 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:33:45,575 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:33:45,576 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:33:45,576 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-10-02 19:33:45,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c0a2f80/357e7b14c8d8498faaf0ded0a63b9c5a/FLAG7d85fdf4f [2019-10-02 19:33:46,280 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:33:46,281 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-10-02 19:33:46,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c0a2f80/357e7b14c8d8498faaf0ded0a63b9c5a/FLAG7d85fdf4f [2019-10-02 19:33:46,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42c0a2f80/357e7b14c8d8498faaf0ded0a63b9c5a [2019-10-02 19:33:46,477 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:33:46,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:33:46,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:33:46,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:33:46,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:33:46,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:33:46" (1/1) ... [2019-10-02 19:33:46,487 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e56ca8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:46, skipping insertion in model container [2019-10-02 19:33:46,487 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:33:46" (1/1) ... [2019-10-02 19:33:46,495 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:33:46,556 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:33:47,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:33:47,248 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:33:47,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:33:47,461 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:33:47,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47 WrapperNode [2019-10-02 19:33:47,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:33:47,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:33:47,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:33:47,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:33:47,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (1/1) ... [2019-10-02 19:33:47,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (1/1) ... [2019-10-02 19:33:47,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (1/1) ... [2019-10-02 19:33:47,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (1/1) ... [2019-10-02 19:33:47,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (1/1) ... [2019-10-02 19:33:47,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (1/1) ... [2019-10-02 19:33:47,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (1/1) ... [2019-10-02 19:33:47,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:33:47,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:33:47,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:33:47,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:33:47,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (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 19:33:47,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:33:47,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:33:47,675 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:33:47,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:33:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:33:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:33:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:33:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:33:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:33:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:33:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:33:49,494 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:33:49,494 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:33:49,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:33:49 BoogieIcfgContainer [2019-10-02 19:33:49,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:33:49,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:33:49,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:33:49,501 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:33:49,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:33:46" (1/3) ... [2019-10-02 19:33:49,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b04751c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:33:49, skipping insertion in model container [2019-10-02 19:33:49,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:33:47" (2/3) ... [2019-10-02 19:33:49,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b04751c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:33:49, skipping insertion in model container [2019-10-02 19:33:49,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:33:49" (3/3) ... [2019-10-02 19:33:49,505 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label15.c [2019-10-02 19:33:49,516 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:33:49,525 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:33:49,543 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:33:49,574 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:33:49,574 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:33:49,574 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:33:49,574 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:33:49,575 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:33:49,575 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:33:49,575 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:33:49,575 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:33:49,615 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:33:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-02 19:33:49,627 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:33:49,629 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:33:49,632 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:33:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:33:49,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1453317925, now seen corresponding path program 1 times [2019-10-02 19:33:49,642 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:33:49,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:49,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:33:49,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:49,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:33:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:33:49,978 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 19:33:49,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:33:49,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:33:49,981 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:33:49,987 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:33:50,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:33:50,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:33:50,006 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 19:33:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:33:52,175 INFO L93 Difference]: Finished difference Result 695 states and 994 transitions. [2019-10-02 19:33:52,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:33:52,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-02 19:33:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:33:52,199 INFO L225 Difference]: With dead ends: 695 [2019-10-02 19:33:52,200 INFO L226 Difference]: Without dead ends: 622 [2019-10-02 19:33:52,201 INFO L640 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 [2019-10-02 19:33:52,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-02 19:33:52,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-02 19:33:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-02 19:33:52,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-02 19:33:52,290 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 20 [2019-10-02 19:33:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:33:52,291 INFO L475 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-02 19:33:52,291 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:33:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-02 19:33:52,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-02 19:33:52,300 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:33:52,300 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2019-10-02 19:33:52,300 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:33:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:33:52,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1546422986, now seen corresponding path program 1 times [2019-10-02 19:33:52,301 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:33:52,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:52,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:33:52,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:52,305 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:33:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:33:52,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:33:52,603 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:33:52,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:33:52,603 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:33:52,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:33:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:33:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:33:52,606 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-02 19:33:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:33:54,225 INFO L93 Difference]: Finished difference Result 1221 states and 1621 transitions. [2019-10-02 19:33:54,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:33:54,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-10-02 19:33:54,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:33:54,236 INFO L225 Difference]: With dead ends: 1221 [2019-10-02 19:33:54,236 INFO L226 Difference]: Without dead ends: 1221 [2019-10-02 19:33:54,237 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:33:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-02 19:33:54,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-02 19:33:54,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-02 19:33:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-02 19:33:54,316 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 100 [2019-10-02 19:33:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:33:54,317 INFO L475 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-02 19:33:54,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:33:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-02 19:33:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-02 19:33:54,326 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:33:54,327 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:54,327 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:33:54,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:33:54,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1386273764, now seen corresponding path program 1 times [2019-10-02 19:33:54,328 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:33:54,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:54,330 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:33:54,330 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:54,330 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:33:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:33:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:33:54,605 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:33:54,605 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:33:54,606 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:33:54,608 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:33:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:33:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:33:54,609 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-10-02 19:33:56,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:33:56,569 INFO L93 Difference]: Finished difference Result 3519 states and 4635 transitions. [2019-10-02 19:33:56,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:33:56,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 151 [2019-10-02 19:33:56,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:33:56,593 INFO L225 Difference]: With dead ends: 3519 [2019-10-02 19:33:56,593 INFO L226 Difference]: Without dead ends: 3519 [2019-10-02 19:33:56,594 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 19:33:56,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2019-10-02 19:33:56,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3118. [2019-10-02 19:33:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3118 states. [2019-10-02 19:33:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 4067 transitions. [2019-10-02 19:33:56,695 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 4067 transitions. Word has length 151 [2019-10-02 19:33:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:33:56,696 INFO L475 AbstractCegarLoop]: Abstraction has 3118 states and 4067 transitions. [2019-10-02 19:33:56,696 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:33:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 4067 transitions. [2019-10-02 19:33:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-02 19:33:56,704 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:33:56,705 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:56,705 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:33:56,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:33:56,705 INFO L82 PathProgramCache]: Analyzing trace with hash 782773517, now seen corresponding path program 1 times [2019-10-02 19:33:56,706 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:33:56,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:56,707 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:33:56,707 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:33:56,708 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:33:56,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:33:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 19:33:56,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:33:56,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:33:56,950 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 187 with the following transitions: [2019-10-02 19:33:56,952 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [69], [71], [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], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [594], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:33:57,002 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:33:57,002 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:35:57,737 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:35:57,739 INFO L272 AbstractInterpreter]: Visited 99 different actions 99 times. Never merged. Never widened. Performed 247 root evaluator evaluations with a maximum evaluation depth of 17. Performed 247 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:35:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:35:57,743 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:37:54,403 INFO L227 lantSequenceWeakener]: Weakened 167 states. On average, predicates are now at 73.26% of their original sizes. [2019-10-02 19:37:54,404 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:37:54,495 INFO L420 sIntCurrentIteration]: We unified 185 AI predicates to 185 [2019-10-02 19:37:54,496 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:37:54,497 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:37:54,497 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 19:37:54,497 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:37:54,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:37:54,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:37:54,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:37:54,499 INFO L87 Difference]: Start difference. First operand 3118 states and 4067 transitions. Second operand 10 states.