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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:50:42,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:50:42,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:50:42,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:50:42,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:50:42,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:50:42,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:50:42,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:50:42,284 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:50:42,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:50:42,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:50:42,290 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:50:42,290 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:50:42,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:50:42,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:50:42,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:50:42,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:50:42,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:50:42,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:50:42,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:50:42,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:50:42,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:50:42,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:50:42,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:50:42,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:50:42,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:50:42,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:50:42,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:50:42,328 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:50:42,360 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:50:42,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:50:42,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:50:42,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:50:42,365 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:50:42,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:50:42,365 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:50:42,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:50:42,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:50:42,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:50:42,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:50:42,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:50:42,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:50:42,367 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:50:42,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:50:42,368 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:50:42,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:50:42,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:50:42,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:50:42,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:50:42,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:50:42,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:50:42,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:50:42,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:50:42,370 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:50:42,370 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:50:42,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:50:42,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:50:42,371 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:50:42,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:50:42,657 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:50:42,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:50:42,662 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:50:42,663 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:50:42,663 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-15 01:50:42,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ed5cfe2/42ff3d013cdc408e9bd384df6dbd0e2e/FLAG660699136 [2019-10-15 01:50:43,440 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:50:43,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label16.c [2019-10-15 01:50:43,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ed5cfe2/42ff3d013cdc408e9bd384df6dbd0e2e/FLAG660699136 [2019-10-15 01:50:43,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1ed5cfe2/42ff3d013cdc408e9bd384df6dbd0e2e [2019-10-15 01:50:43,568 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:50:43,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:50:43,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:50:43,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:50:43,579 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:50:43,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:50:43" (1/1) ... [2019-10-15 01:50:43,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663c421b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:43, skipping insertion in model container [2019-10-15 01:50:43,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:50:43" (1/1) ... [2019-10-15 01:50:43,592 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:50:43,761 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:50:45,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:50:45,369 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:50:45,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:50:45,967 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:50:45,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45 WrapperNode [2019-10-15 01:50:45,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:50:45,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:50:45,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:50:45,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:50:45,982 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (1/1) ... [2019-10-15 01:50:45,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (1/1) ... [2019-10-15 01:50:46,055 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (1/1) ... [2019-10-15 01:50:46,057 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (1/1) ... [2019-10-15 01:50:46,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (1/1) ... [2019-10-15 01:50:46,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (1/1) ... [2019-10-15 01:50:46,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (1/1) ... [2019-10-15 01:50:46,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:50:46,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:50:46,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:50:46,268 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:50:46,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (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 [2019-10-15 01:50:46,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:50:46,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:50:46,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:50:46,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:50:46,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 01:50:46,348 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 01:50:46,349 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:50:46,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:50:46,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:50:46,351 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 01:50:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 01:50:46,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:50:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:50:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:50:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:50:46,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:50:46,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:50:53,560 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:50:53,561 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:50:53,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:50:53 BoogieIcfgContainer [2019-10-15 01:50:53,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:50:53,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:50:53,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:50:53,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:50:53,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:50:43" (1/3) ... [2019-10-15 01:50:53,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9fe7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:50:53, skipping insertion in model container [2019-10-15 01:50:53,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:50:45" (2/3) ... [2019-10-15 01:50:53,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b9fe7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:50:53, skipping insertion in model container [2019-10-15 01:50:53,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:50:53" (3/3) ... [2019-10-15 01:50:53,574 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label16.c [2019-10-15 01:50:53,585 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:50:53,598 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:50:53,610 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:50:53,650 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:50:53,650 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:50:53,650 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:50:53,650 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:50:53,650 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:50:53,651 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:50:53,651 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:50:53,651 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:50:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-15 01:50:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:50:53,697 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:50:53,698 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:50:53,700 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:50:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:50:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -874903474, now seen corresponding path program 1 times [2019-10-15 01:50:53,716 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:50:53,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996987348] [2019-10-15 01:50:53,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:50:53,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:50:53,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:50:53,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:50:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:50:54,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996987348] [2019-10-15 01:50:54,033 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:50:54,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:50:54,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049966816] [2019-10-15 01:50:54,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:50:54,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:50:54,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:50:54,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:50:54,056 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-15 01:50:58,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:50:58,735 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-15 01:50:58,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:50:58,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:50:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:50:58,771 INFO L225 Difference]: With dead ends: 2068 [2019-10-15 01:50:58,771 INFO L226 Difference]: Without dead ends: 1371 [2019-10-15 01:50:58,779 INFO L600 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 [2019-10-15 01:50:58,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-15 01:50:58,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1357. [2019-10-15 01:50:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1357 states. [2019-10-15 01:50:58,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2576 transitions. [2019-10-15 01:50:58,921 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2576 transitions. Word has length 11 [2019-10-15 01:50:58,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:50:58,922 INFO L462 AbstractCegarLoop]: Abstraction has 1357 states and 2576 transitions. [2019-10-15 01:50:58,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:50:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2576 transitions. [2019-10-15 01:50:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:50:58,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:50:58,924 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:50:58,925 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:50:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:50:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash 600043375, now seen corresponding path program 1 times [2019-10-15 01:50:58,925 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:50:58,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268772886] [2019-10-15 01:50:58,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:50:58,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:50:58,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:50:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:50:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:50:59,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268772886] [2019-10-15 01:50:59,081 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:50:59,081 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:50:59,082 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730764802] [2019-10-15 01:50:59,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:50:59,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:50:59,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:50:59,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:50:59,084 INFO L87 Difference]: Start difference. First operand 1357 states and 2576 transitions. Second operand 5 states. [2019-10-15 01:51:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:05,259 INFO L93 Difference]: Finished difference Result 4103 states and 7818 transitions. [2019-10-15 01:51:05,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:51:05,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-10-15 01:51:05,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:05,280 INFO L225 Difference]: With dead ends: 4103 [2019-10-15 01:51:05,280 INFO L226 Difference]: Without dead ends: 2751 [2019-10-15 01:51:05,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:51:05,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2019-10-15 01:51:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2739. [2019-10-15 01:51:05,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-10-15 01:51:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4960 transitions. [2019-10-15 01:51:05,377 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4960 transitions. Word has length 25 [2019-10-15 01:51:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:05,377 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 4960 transitions. [2019-10-15 01:51:05,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:51:05,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4960 transitions. [2019-10-15 01:51:05,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:51:05,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:05,379 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:05,379 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:05,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:05,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1719281653, now seen corresponding path program 1 times [2019-10-15 01:51:05,380 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:05,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638133994] [2019-10-15 01:51:05,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:05,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:05,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:05,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:05,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638133994] [2019-10-15 01:51:05,464 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:05,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:51:05,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867039056] [2019-10-15 01:51:05,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:51:05,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:51:05,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:51:05,465 INFO L87 Difference]: Start difference. First operand 2739 states and 4960 transitions. Second operand 4 states. [2019-10-15 01:51:12,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:12,936 INFO L93 Difference]: Finished difference Result 9592 states and 17478 transitions. [2019-10-15 01:51:12,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:51:12,938 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-15 01:51:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:12,984 INFO L225 Difference]: With dead ends: 9592 [2019-10-15 01:51:12,985 INFO L226 Difference]: Without dead ends: 6858 [2019-10-15 01:51:12,993 INFO L600 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 [2019-10-15 01:51:13,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2019-10-15 01:51:13,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6834. [2019-10-15 01:51:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6834 states. [2019-10-15 01:51:13,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6834 states to 6834 states and 11780 transitions. [2019-10-15 01:51:13,220 INFO L78 Accepts]: Start accepts. Automaton has 6834 states and 11780 transitions. Word has length 27 [2019-10-15 01:51:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:13,221 INFO L462 AbstractCegarLoop]: Abstraction has 6834 states and 11780 transitions. [2019-10-15 01:51:13,221 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:51:13,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6834 states and 11780 transitions. [2019-10-15 01:51:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:51:13,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:13,224 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:51:13,224 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:13,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:13,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2114190881, now seen corresponding path program 1 times [2019-10-15 01:51:13,225 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:13,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025081645] [2019-10-15 01:51:13,225 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:13,226 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:13,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:13,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025081645] [2019-10-15 01:51:13,384 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:13,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:51:13,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074267891] [2019-10-15 01:51:13,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:51:13,385 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:51:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:51:13,387 INFO L87 Difference]: Start difference. First operand 6834 states and 11780 transitions. Second operand 6 states.