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/Problem16_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:47,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:47,285 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:47,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:56:47,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:56:47,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:56:47,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:56:47,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:56:47,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:56:47,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:56:47,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:56:47,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:56:47,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:47,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:47,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:47,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:47,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:47,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:47,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:47,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:47,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:47,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:47,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:47,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:47,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:47,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:47,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:47,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:47,361 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 01:56:47,394 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:47,394 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:47,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:47,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:47,396 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:47,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:47,396 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:47,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:47,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:47,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:47,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:47,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:47,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:47,397 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:47,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:47,398 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:47,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:47,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:47,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:47,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:47,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:47,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:47,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:47,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:47,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:47,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:47,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:47,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:47,400 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 01:56:47,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:47,712 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:47,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:47,717 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:47,718 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:47,718 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-15 01:56:47,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bc86908/a7453cd0ffa34770ae6d8843f6ad6348/FLAG909deaa42 [2019-10-15 01:56:48,433 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:48,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-15 01:56:48,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bc86908/a7453cd0ffa34770ae6d8843f6ad6348/FLAG909deaa42 [2019-10-15 01:56:48,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87bc86908/a7453cd0ffa34770ae6d8843f6ad6348 [2019-10-15 01:56:48,593 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:48,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:48,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:48,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:48,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:48,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:48" (1/1) ... [2019-10-15 01:56:48,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5370fc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:48, skipping insertion in model container [2019-10-15 01:56:48,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:48" (1/1) ... [2019-10-15 01:56:48,610 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:48,676 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:49,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:49,697 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:50,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:50,086 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:50,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50 WrapperNode [2019-10-15 01:56:50,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:50,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:50,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:50,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:50,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (1/1) ... [2019-10-15 01:56:50,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (1/1) ... [2019-10-15 01:56:50,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (1/1) ... [2019-10-15 01:56:50,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (1/1) ... [2019-10-15 01:56:50,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (1/1) ... [2019-10-15 01:56:50,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (1/1) ... [2019-10-15 01:56:50,288 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (1/1) ... [2019-10-15 01:56:50,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:50,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:50,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:50,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:50,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (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 01:56:50,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:50,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:50,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:50,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:50,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:50,376 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:50,377 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:50,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:50,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:57:06,199 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:57:06,199 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:57:06,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:06 BoogieIcfgContainer [2019-10-15 01:57:06,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:57:06,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:57:06,205 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:57:06,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:57:06,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:48" (1/3) ... [2019-10-15 01:57:06,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4e57d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:06, skipping insertion in model container [2019-10-15 01:57:06,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:50" (2/3) ... [2019-10-15 01:57:06,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a4e57d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:57:06, skipping insertion in model container [2019-10-15 01:57:06,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:57:06" (3/3) ... [2019-10-15 01:57:06,212 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label59.c [2019-10-15 01:57:06,220 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:57:06,227 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:57:06,238 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:57:06,265 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:57:06,266 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:57:06,266 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:57:06,266 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:57:06,266 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:57:06,266 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:57:06,266 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:57:06,267 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:57:06,290 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:57:06,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:57:06,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:06,297 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:06,298 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:06,304 INFO L82 PathProgramCache]: Analyzing trace with hash 863564095, now seen corresponding path program 1 times [2019-10-15 01:57:06,311 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:06,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801820662] [2019-10-15 01:57:06,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:06,312 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:06,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:06,515 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 01:57:06,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801820662] [2019-10-15 01:57:06,516 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:06,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:57:06,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9864787] [2019-10-15 01:57:06,521 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:57:06,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:06,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:57:06,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:57:06,538 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:57:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:08,996 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:57:08,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:57:08,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:57:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:09,034 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:57:09,035 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:57:09,047 INFO L600 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 [2019-10-15 01:57:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:57:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 463. [2019-10-15 01:57:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463 states. [2019-10-15 01:57:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 876 transitions. [2019-10-15 01:57:09,184 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 876 transitions. Word has length 11 [2019-10-15 01:57:09,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:09,185 INFO L462 AbstractCegarLoop]: Abstraction has 463 states and 876 transitions. [2019-10-15 01:57:09,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:57:09,185 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 876 transitions. [2019-10-15 01:57:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:57:09,187 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:09,187 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:09,188 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:09,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1033014299, now seen corresponding path program 1 times [2019-10-15 01:57:09,189 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:09,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554877443] [2019-10-15 01:57:09,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:09,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:09,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:09,300 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 01:57:09,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554877443] [2019-10-15 01:57:09,304 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:09,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:57:09,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806394193] [2019-10-15 01:57:09,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:09,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:57:09,311 INFO L87 Difference]: Start difference. First operand 463 states and 876 transitions. Second operand 5 states. [2019-10-15 01:57:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:11,391 INFO L93 Difference]: Finished difference Result 1395 states and 2674 transitions. [2019-10-15 01:57:11,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:11,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-15 01:57:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:11,401 INFO L225 Difference]: With dead ends: 1395 [2019-10-15 01:57:11,401 INFO L226 Difference]: Without dead ends: 937 [2019-10-15 01:57:11,407 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 01:57:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-10-15 01:57:11,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 918. [2019-10-15 01:57:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-10-15 01:57:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1637 transitions. [2019-10-15 01:57:11,481 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1637 transitions. Word has length 21 [2019-10-15 01:57:11,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:11,482 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1637 transitions. [2019-10-15 01:57:11,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1637 transitions. [2019-10-15 01:57:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:57:11,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:11,484 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] [2019-10-15 01:57:11,484 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:11,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1941309818, now seen corresponding path program 1 times [2019-10-15 01:57:11,485 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:11,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130533526] [2019-10-15 01:57:11,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:11,487 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:11,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:11,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:11,703 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 01:57:11,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130533526] [2019-10-15 01:57:11,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:11,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:11,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197999483] [2019-10-15 01:57:11,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:11,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:11,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:11,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:11,706 INFO L87 Difference]: Start difference. First operand 918 states and 1637 transitions. Second operand 6 states. [2019-10-15 01:57:13,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:13,757 INFO L93 Difference]: Finished difference Result 2531 states and 4571 transitions. [2019-10-15 01:57:13,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:13,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-10-15 01:57:13,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:13,768 INFO L225 Difference]: With dead ends: 2531 [2019-10-15 01:57:13,769 INFO L226 Difference]: Without dead ends: 1618 [2019-10-15 01:57:13,772 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2019-10-15 01:57:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1594. [2019-10-15 01:57:13,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1594 states. [2019-10-15 01:57:13,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2779 transitions. [2019-10-15 01:57:13,883 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2779 transitions. Word has length 24 [2019-10-15 01:57:13,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:13,884 INFO L462 AbstractCegarLoop]: Abstraction has 1594 states and 2779 transitions. [2019-10-15 01:57:13,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:13,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2779 transitions. [2019-10-15 01:57:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:57:13,885 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:13,885 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 01:57:13,885 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:13,886 INFO L82 PathProgramCache]: Analyzing trace with hash 968103453, now seen corresponding path program 1 times [2019-10-15 01:57:13,886 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:13,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89952769] [2019-10-15 01:57:13,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:13,886 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:13,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:13,977 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 01:57:13,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89952769] [2019-10-15 01:57:13,978 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:13,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:13,979 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835604772] [2019-10-15 01:57:13,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:13,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:13,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:13,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:13,980 INFO L87 Difference]: Start difference. First operand 1594 states and 2779 transitions. Second operand 6 states. [2019-10-15 01:57:15,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:15,982 INFO L93 Difference]: Finished difference Result 3661 states and 6383 transitions. [2019-10-15 01:57:15,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:15,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-15 01:57:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:16,001 INFO L225 Difference]: With dead ends: 3661 [2019-10-15 01:57:16,001 INFO L226 Difference]: Without dead ends: 2072 [2019-10-15 01:57:16,006 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:16,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2019-10-15 01:57:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1974. [2019-10-15 01:57:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1974 states. [2019-10-15 01:57:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 3150 transitions. [2019-10-15 01:57:16,093 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 3150 transitions. Word has length 25 [2019-10-15 01:57:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:16,093 INFO L462 AbstractCegarLoop]: Abstraction has 1974 states and 3150 transitions. [2019-10-15 01:57:16,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:16,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 3150 transitions. [2019-10-15 01:57:16,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 01:57:16,095 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:16,095 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] [2019-10-15 01:57:16,096 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash -553771714, now seen corresponding path program 1 times [2019-10-15 01:57:16,096 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:16,097 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315289707] [2019-10-15 01:57:16,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:16,097 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:16,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:16,186 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 01:57:16,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315289707] [2019-10-15 01:57:16,187 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:16,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:16,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052734095] [2019-10-15 01:57:16,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:16,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:16,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:16,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:16,189 INFO L87 Difference]: Start difference. First operand 1974 states and 3150 transitions. Second operand 6 states. [2019-10-15 01:57:18,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:18,135 INFO L93 Difference]: Finished difference Result 5108 states and 8377 transitions. [2019-10-15 01:57:18,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:57:18,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-15 01:57:18,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:18,157 INFO L225 Difference]: With dead ends: 5108 [2019-10-15 01:57:18,157 INFO L226 Difference]: Without dead ends: 3139 [2019-10-15 01:57:18,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:57:18,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2019-10-15 01:57:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3067. [2019-10-15 01:57:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3067 states. [2019-10-15 01:57:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3067 states to 3067 states and 4847 transitions. [2019-10-15 01:57:18,255 INFO L78 Accepts]: Start accepts. Automaton has 3067 states and 4847 transitions. Word has length 28 [2019-10-15 01:57:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:18,256 INFO L462 AbstractCegarLoop]: Abstraction has 3067 states and 4847 transitions. [2019-10-15 01:57:18,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:18,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3067 states and 4847 transitions. [2019-10-15 01:57:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 01:57:18,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:18,258 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, 1, 1, 1] [2019-10-15 01:57:18,258 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:18,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:18,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1118369106, now seen corresponding path program 1 times [2019-10-15 01:57:18,259 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:18,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320310824] [2019-10-15 01:57:18,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:18,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:18,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:18,322 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 01:57:18,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320310824] [2019-10-15 01:57:18,322 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:18,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:18,323 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147964160] [2019-10-15 01:57:18,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:18,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:18,324 INFO L87 Difference]: Start difference. First operand 3067 states and 4847 transitions. Second operand 6 states. [2019-10-15 01:57:20,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:20,192 INFO L93 Difference]: Finished difference Result 8110 states and 13134 transitions. [2019-10-15 01:57:20,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:57:20,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2019-10-15 01:57:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:20,216 INFO L225 Difference]: With dead ends: 8110 [2019-10-15 01:57:20,217 INFO L226 Difference]: Without dead ends: 5048 [2019-10-15 01:57:20,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:20,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5048 states. [2019-10-15 01:57:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5048 to 4116. [2019-10-15 01:57:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4116 states. [2019-10-15 01:57:20,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4116 states to 4116 states and 6098 transitions. [2019-10-15 01:57:20,347 INFO L78 Accepts]: Start accepts. Automaton has 4116 states and 6098 transitions. Word has length 36 [2019-10-15 01:57:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:20,347 INFO L462 AbstractCegarLoop]: Abstraction has 4116 states and 6098 transitions. [2019-10-15 01:57:20,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 4116 states and 6098 transitions. [2019-10-15 01:57:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:57:20,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:20,349 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:20,349 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:20,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1261642727, now seen corresponding path program 1 times [2019-10-15 01:57:20,350 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:20,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615980841] [2019-10-15 01:57:20,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:20,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:20,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:20,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:20,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615980841] [2019-10-15 01:57:20,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081332242] [2019-10-15 01:57:20,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:20,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:20,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:20,571 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 01:57:20,571 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:20,614 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 01:57:20,614 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:57:20,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 01:57:20,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821834093] [2019-10-15 01:57:20,615 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:57:20,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:20,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:57:20,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:20,616 INFO L87 Difference]: Start difference. First operand 4116 states and 6098 transitions. Second operand 4 states. [2019-10-15 01:57:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:22,615 INFO L93 Difference]: Finished difference Result 9300 states and 13489 transitions. [2019-10-15 01:57:22,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:57:22,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2019-10-15 01:57:22,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:22,653 INFO L225 Difference]: With dead ends: 9300 [2019-10-15 01:57:22,655 INFO L226 Difference]: Without dead ends: 5189 [2019-10-15 01:57:22,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:22,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5189 states. [2019-10-15 01:57:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5189 to 3555. [2019-10-15 01:57:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3555 states. [2019-10-15 01:57:22,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 4725 transitions. [2019-10-15 01:57:22,824 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 4725 transitions. Word has length 43 [2019-10-15 01:57:22,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:22,826 INFO L462 AbstractCegarLoop]: Abstraction has 3555 states and 4725 transitions. [2019-10-15 01:57:22,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:57:22,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 4725 transitions. [2019-10-15 01:57:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-15 01:57:22,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:22,843 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:57:23,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:23,057 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:23,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -440793517, now seen corresponding path program 1 times [2019-10-15 01:57:23,058 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:23,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145297876] [2019-10-15 01:57:23,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:23,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:23,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:57:23,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145297876] [2019-10-15 01:57:23,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56504054] [2019-10-15 01:57:23,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:23,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:23,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:57:23,363 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-15 01:57:23,397 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:57:23,397 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 01:57:23,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90779716] [2019-10-15 01:57:23,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:57:23,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:57:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:23,402 INFO L87 Difference]: Start difference. First operand 3555 states and 4725 transitions. Second operand 4 states.