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_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:27:41,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:27:41,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:27:41,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:27:41,519 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 19:27:41,554 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:27:41,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:27:41,554 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:27:41,555 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:27:41,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:27:41,557 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:27:41,557 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:27:41,557 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:27:41,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:27:41,557 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:27:41,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:27:41,560 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:27:41,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:27:41,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:27:41,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:27:41,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:27:41,561 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:27:41,561 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:27:41,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:27:41,562 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:27:41,562 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:27:41,562 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:27:41,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:27:41,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:27:41,563 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:27:41,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:27:41,563 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:27:41,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:27:41,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:27:41,564 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:27:41,619 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:27:41,636 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:27:41,642 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:27:41,644 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:27:41,644 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:27:41,645 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label07.c [2019-10-02 19:27:41,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8a1c044/0ea96b76aaa04bcc9f0afd86cfa94180/FLAG864f63dd1 [2019-10-02 19:27:42,355 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:27:42,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label07.c [2019-10-02 19:27:42,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8a1c044/0ea96b76aaa04bcc9f0afd86cfa94180/FLAG864f63dd1 [2019-10-02 19:27:42,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8a1c044/0ea96b76aaa04bcc9f0afd86cfa94180 [2019-10-02 19:27:42,563 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:27:42,565 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:27:42,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:27:42,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:27:42,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:27:42,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:27:42" (1/1) ... [2019-10-02 19:27:42,577 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3143413b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:42, skipping insertion in model container [2019-10-02 19:27:42,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:27:42" (1/1) ... [2019-10-02 19:27:42,585 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:27:42,665 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:27:43,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:27:43,575 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:27:43,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:27:43,790 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:27:43,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43 WrapperNode [2019-10-02 19:27:43,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:27:43,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:27:43,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:27:43,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:27:43,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (1/1) ... [2019-10-02 19:27:43,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (1/1) ... [2019-10-02 19:27:43,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (1/1) ... [2019-10-02 19:27:43,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (1/1) ... [2019-10-02 19:27:43,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (1/1) ... [2019-10-02 19:27:43,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (1/1) ... [2019-10-02 19:27:43,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (1/1) ... [2019-10-02 19:27:43,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:27:43,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:27:43,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:27:43,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:27:43,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (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 19:27:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:27:44,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:27:44,069 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:27:44,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:27:44,069 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:27:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:27:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:27:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:27:44,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:27:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:27:44,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:27:46,063 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:27:46,063 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:27:46,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:27:46 BoogieIcfgContainer [2019-10-02 19:27:46,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:27:46,067 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:27:46,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:27:46,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:27:46,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:27:42" (1/3) ... [2019-10-02 19:27:46,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c47b28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:27:46, skipping insertion in model container [2019-10-02 19:27:46,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:27:43" (2/3) ... [2019-10-02 19:27:46,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c47b28e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:27:46, skipping insertion in model container [2019-10-02 19:27:46,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:27:46" (3/3) ... [2019-10-02 19:27:46,075 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label07.c [2019-10-02 19:27:46,086 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:27:46,096 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:27:46,115 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:27:46,145 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:27:46,146 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:27:46,146 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:27:46,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:27:46,146 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:27:46,147 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:27:46,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:27:46,147 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:27:46,174 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:27:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-02 19:27:46,186 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:27:46,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 19:27:46,190 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:27:46,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:27:46,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1280127794, now seen corresponding path program 1 times [2019-10-02 19:27:46,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:27:46,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:46,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:27:46,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:46,265 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:27:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:27:46,631 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 19:27:46,633 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:27:46,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:27:46,634 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:27:46,639 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:27:46,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:27:46,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:27:46,658 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 19:27:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:27:48,983 INFO L93 Difference]: Finished difference Result 695 states and 994 transitions. [2019-10-02 19:27:48,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:27:48,985 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-02 19:27:48,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:27:49,008 INFO L225 Difference]: With dead ends: 695 [2019-10-02 19:27:49,008 INFO L226 Difference]: Without dead ends: 622 [2019-10-02 19:27:49,010 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 19:27:49,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-02 19:27:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-02 19:27:49,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-02 19:27:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-02 19:27:49,110 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 29 [2019-10-02 19:27:49,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:27:49,110 INFO L475 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-02 19:27:49,111 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:27:49,111 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-02 19:27:49,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-02 19:27:49,121 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:27:49,122 INFO L411 BasicCegarLoop]: trace histogram [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] [2019-10-02 19:27:49,122 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:27:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:27:49,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1981199134, now seen corresponding path program 1 times [2019-10-02 19:27:49,124 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:27:49,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:49,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:27:49,127 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:49,128 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:27:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:27:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:27:49,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:27:49,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:27:49,374 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:27:49,376 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:27:49,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:27:49,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:27:49,377 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-02 19:27:51,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:27:51,112 INFO L93 Difference]: Finished difference Result 1221 states and 1621 transitions. [2019-10-02 19:27:51,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:27:51,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-02 19:27:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:27:51,124 INFO L225 Difference]: With dead ends: 1221 [2019-10-02 19:27:51,124 INFO L226 Difference]: Without dead ends: 1221 [2019-10-02 19:27:51,126 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 19:27:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-02 19:27:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-02 19:27:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-02 19:27:51,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-02 19:27:51,192 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 109 [2019-10-02 19:27:51,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:27:51,193 INFO L475 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-02 19:27:51,193 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:27:51,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-02 19:27:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-02 19:27:51,198 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:27:51,198 INFO L411 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:27:51,199 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:27:51,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:27:51,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1129088726, now seen corresponding path program 1 times [2019-10-02 19:27:51,199 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:27:51,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:51,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:27:51,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:27:51,202 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:27:51,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:27:51,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:27:51,632 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:27:51,633 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:27:51,634 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 161 with the following transitions: [2019-10-02 19:27:51,636 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [141], [143], [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], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:27:51,707 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:27:51,707 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:31:33,024 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:34:19,173 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:34:19,176 INFO L272 AbstractInterpreter]: Visited 138 different actions 271 times. Merged at 4 different actions 5 times. Never widened. Performed 651 root evaluator evaluations with a maximum evaluation depth of 17. Performed 651 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2019-10-02 19:34:19,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:34:19,181 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:36:33,411 INFO L227 lantSequenceWeakener]: Weakened 157 states. On average, predicates are now at 73.22% of their original sizes. [2019-10-02 19:36:33,412 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:36:33,531 INFO L420 sIntCurrentIteration]: We unified 159 AI predicates to 159 [2019-10-02 19:36:33,531 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:36:33,532 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:36:33,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2019-10-02 19:36:33,533 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:36:33,534 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 19:36:33,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 19:36:33,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-02 19:36:33,535 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 13 states.