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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:37:49,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:37:49,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:37:49,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 19:37:50,035 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 19:37:50,050 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:37:50,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:37:50,051 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:37:50,051 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:37:50,052 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:37:50,052 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:37:50,052 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:37:50,052 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:37:50,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:37:50,053 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:37:50,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:37:50,053 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:37:50,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:37:50,054 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:37:50,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:37:50,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:37:50,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:37:50,055 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:37:50,055 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:37:50,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:37:50,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:37:50,055 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:37:50,056 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:37:50,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:37:50,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:37:50,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:37:50,056 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:37:50,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:37:50,057 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:37:50,057 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:37:50,094 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:37:50,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:37:50,111 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:37:50,113 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:37:50,113 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:37:50,114 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-10-02 19:37:50,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc60aa9ac/81db27bc5d9e40dbae5734ccf0291943/FLAG7b8119e92 [2019-10-02 19:37:50,828 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:37:50,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label26.c [2019-10-02 19:37:50,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc60aa9ac/81db27bc5d9e40dbae5734ccf0291943/FLAG7b8119e92 [2019-10-02 19:37:51,156 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc60aa9ac/81db27bc5d9e40dbae5734ccf0291943 [2019-10-02 19:37:51,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:37:51,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:37:51,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:37:51,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:37:51,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:37:51,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:37:51" (1/1) ... [2019-10-02 19:37:51,178 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:51, skipping insertion in model container [2019-10-02 19:37:51,178 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:37:51" (1/1) ... [2019-10-02 19:37:51,186 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:37:51,242 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:37:51,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:37:51,899 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:37:52,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:37:52,093 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:37:52,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52 WrapperNode [2019-10-02 19:37:52,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:37:52,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:37:52,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:37:52,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:37:52,117 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (1/1) ... [2019-10-02 19:37:52,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (1/1) ... [2019-10-02 19:37:52,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (1/1) ... [2019-10-02 19:37:52,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (1/1) ... [2019-10-02 19:37:52,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (1/1) ... [2019-10-02 19:37:52,265 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (1/1) ... [2019-10-02 19:37:52,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (1/1) ... [2019-10-02 19:37:52,308 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:37:52,309 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:37:52,309 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:37:52,309 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:37:52,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (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 19:37:52,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:37:52,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:37:52,417 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:37:52,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:37:52,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:37:52,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:37:52,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:37:52,418 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:37:52,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:37:52,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:37:52,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:37:54,468 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:37:54,469 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:37:54,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:37:54 BoogieIcfgContainer [2019-10-02 19:37:54,471 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:37:54,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:37:54,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:37:54,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:37:54,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:37:51" (1/3) ... [2019-10-02 19:37:54,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69768f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:37:54, skipping insertion in model container [2019-10-02 19:37:54,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:37:52" (2/3) ... [2019-10-02 19:37:54,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69768f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:37:54, skipping insertion in model container [2019-10-02 19:37:54,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:37:54" (3/3) ... [2019-10-02 19:37:54,483 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label26.c [2019-10-02 19:37:54,496 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:37:54,509 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:37:54,528 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:37:54,567 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:37:54,568 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:37:54,568 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:37:54,569 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:37:54,569 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:37:54,569 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:37:54,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:37:54,569 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:37:54,614 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:37:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-02 19:37:54,628 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:37:54,629 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, 1, 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 19:37:54,633 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:37:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:37:54,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2020342670, now seen corresponding path program 1 times [2019-10-02 19:37:54,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:37:54,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:37:54,688 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:37:54,688 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:37:54,688 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:37:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:37:55,064 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 19:37:55,067 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:37:55,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:37:55,067 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:37:55,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:37:55,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:37:55,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:37:55,092 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-02 19:37:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:37:56,685 INFO L93 Difference]: Finished difference Result 493 states and 799 transitions. [2019-10-02 19:37:56,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:37:56,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-10-02 19:37:56,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:37:56,706 INFO L225 Difference]: With dead ends: 493 [2019-10-02 19:37:56,706 INFO L226 Difference]: Without dead ends: 425 [2019-10-02 19:37:56,708 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:37:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-02 19:37:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-02 19:37:56,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-02 19:37:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-10-02 19:37:56,793 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 45 [2019-10-02 19:37:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:37:56,794 INFO L475 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-10-02 19:37:56,794 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:37:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-10-02 19:37:56,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-02 19:37:56,800 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:37:56,801 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, 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] [2019-10-02 19:37:56,801 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:37:56,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:37:56,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1793518198, now seen corresponding path program 1 times [2019-10-02 19:37:56,802 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:37:56,803 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:37:56,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:37:56,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:37:56,804 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:37:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:37:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:37:57,041 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:37:57,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 19:37:57,041 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:37:57,043 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 19:37:57,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 19:37:57,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:37:57,044 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 3 states. [2019-10-02 19:37:58,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:37:58,202 INFO L93 Difference]: Finished difference Result 803 states and 1166 transitions. [2019-10-02 19:37:58,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 19:37:58,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 119 [2019-10-02 19:37:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:37:58,210 INFO L225 Difference]: With dead ends: 803 [2019-10-02 19:37:58,210 INFO L226 Difference]: Without dead ends: 803 [2019-10-02 19:37:58,211 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 19:37:58,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2019-10-02 19:37:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 803. [2019-10-02 19:37:58,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 803 states. [2019-10-02 19:37:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1166 transitions. [2019-10-02 19:37:58,258 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1166 transitions. Word has length 119 [2019-10-02 19:37:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:37:58,259 INFO L475 AbstractCegarLoop]: Abstraction has 803 states and 1166 transitions. [2019-10-02 19:37:58,259 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 19:37:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1166 transitions. [2019-10-02 19:37:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-02 19:37:58,265 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:37:58,266 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, 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] [2019-10-02 19:37:58,266 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:37:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:37:58,266 INFO L82 PathProgramCache]: Analyzing trace with hash 406650521, now seen corresponding path program 1 times [2019-10-02 19:37:58,267 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:37:58,268 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:37:58,268 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:37:58,269 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:37:58,269 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:37:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:37:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:37:58,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:37:58,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:37:58,428 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:37:58,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:37:58,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:37:58,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:37:58,430 INFO L87 Difference]: Start difference. First operand 803 states and 1166 transitions. Second operand 6 states. [2019-10-02 19:38:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:38:01,120 INFO L93 Difference]: Finished difference Result 2180 states and 3046 transitions. [2019-10-02 19:38:01,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:38:01,121 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-10-02 19:38:01,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:38:01,156 INFO L225 Difference]: With dead ends: 2180 [2019-10-02 19:38:01,157 INFO L226 Difference]: Without dead ends: 2180 [2019-10-02 19:38:01,158 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 19:38:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2019-10-02 19:38:01,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1978. [2019-10-02 19:38:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2019-10-02 19:38:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2771 transitions. [2019-10-02 19:38:01,304 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2771 transitions. Word has length 130 [2019-10-02 19:38:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:38:01,313 INFO L475 AbstractCegarLoop]: Abstraction has 1978 states and 2771 transitions. [2019-10-02 19:38:01,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:38:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2771 transitions. [2019-10-02 19:38:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-02 19:38:01,339 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:38:01,339 INFO L411 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, 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, 1, 1, 1, 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 19:38:01,340 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:38:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:38:01,345 INFO L82 PathProgramCache]: Analyzing trace with hash 622607653, now seen corresponding path program 1 times [2019-10-02 19:38:01,345 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:38:01,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:38:01,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:38:01,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:38:01,348 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:38:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:38:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:38:01,747 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:38:01,747 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:38:01,748 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 209 with the following transitions: [2019-10-02 19:38:01,751 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [269], [271], [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], [510], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [578], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:38:01,825 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:38:01,825 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:40:00,511 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:40:00,513 INFO L272 AbstractInterpreter]: Visited 95 different actions 95 times. Never merged. Never widened. Performed 239 root evaluator evaluations with a maximum evaluation depth of 17. Performed 239 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 28 variables. [2019-10-02 19:40:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:40:00,518 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:41:59,689 INFO L227 lantSequenceWeakener]: Weakened 189 states. On average, predicates are now at 73.75% of their original sizes. [2019-10-02 19:41:59,690 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:41:59,779 INFO L420 sIntCurrentIteration]: We unified 207 AI predicates to 207 [2019-10-02 19:41:59,780 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:41:59,781 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:41:59,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 14 [2019-10-02 19:41:59,781 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:41:59,782 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-02 19:41:59,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-02 19:41:59,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-02 19:41:59,783 INFO L87 Difference]: Start difference. First operand 1978 states and 2771 transitions. Second operand 10 states.