/usr/bin/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/array-examples/standard_copy1_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:21:02,063 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:21:02,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:21:02,088 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:21:02,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:21:02,090 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:21:02,091 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:21:02,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:21:02,093 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:21:02,096 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:21:02,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:21:02,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:21:02,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:21:02,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:21:02,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:21:02,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:21:02,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:21:02,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:21:02,112 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 [2019-11-07 01:21:02,131 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:21:02,131 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:21:02,132 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:21:02,132 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:21:02,133 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:21:02,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:21:02,133 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:21:02,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:21:02,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:21:02,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:21:02,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:21:02,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:21:02,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:21:02,135 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:21:02,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:21:02,135 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:21:02,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:21:02,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:21:02,137 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:21:02,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:21:02,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:21:02,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:21:02,138 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:21:02,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:21:02,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:21:02,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:21:02,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:21:02,139 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:21:02,139 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 [2019-11-07 01:21:02,442 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:21:02,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:21:02,470 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:21:02,471 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:21:02,471 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:21:02,472 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-11-07 01:21:02,544 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7db5d5633/0ffb7e5363814a6e8b8404d6155770d2/FLAG6ce2f7ff7 [2019-11-07 01:21:02,966 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:21:02,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-11-07 01:21:02,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7db5d5633/0ffb7e5363814a6e8b8404d6155770d2/FLAG6ce2f7ff7 [2019-11-07 01:21:03,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7db5d5633/0ffb7e5363814a6e8b8404d6155770d2 [2019-11-07 01:21:03,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:21:03,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:21:03,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:03,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:21:03,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:21:03,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f087c8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03, skipping insertion in model container [2019-11-07 01:21:03,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,451 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:21:03,474 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:21:03,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:03,658 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:21:03,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:21:03,697 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:21:03,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03 WrapperNode [2019-11-07 01:21:03,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:21:03,698 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:21:03,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:21:03,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:21:03,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (1/1) ... [2019-11-07 01:21:03,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:21:03,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:21:03,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:21:03,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:21:03,827 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (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 [2019-11-07 01:21:03,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:21:03,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:21:03,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:21:03,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:21:03,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:21:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:21:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:21:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:21:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:21:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:21:03,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:21:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:21:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:21:03,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:21:04,236 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:21:04,236 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:21:04,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:04 BoogieIcfgContainer [2019-11-07 01:21:04,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:21:04,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:21:04,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:21:04,242 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:21:04,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:21:03" (1/3) ... [2019-11-07 01:21:04,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de9dcfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:04, skipping insertion in model container [2019-11-07 01:21:04,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:21:03" (2/3) ... [2019-11-07 01:21:04,243 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de9dcfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:21:04, skipping insertion in model container [2019-11-07 01:21:04,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:21:04" (3/3) ... [2019-11-07 01:21:04,245 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2019-11-07 01:21:04,253 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:21:04,261 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:21:04,274 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:21:04,294 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:21:04,295 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:21:04,295 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:21:04,295 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:21:04,295 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:21:04,296 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:21:04,296 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:21:04,296 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:21:04,310 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 01:21:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:21:04,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:04,317 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:04,319 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:04,324 INFO L82 PathProgramCache]: Analyzing trace with hash -973561822, now seen corresponding path program 1 times [2019-11-07 01:21:04,331 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:04,332 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117369039] [2019-11-07 01:21:04,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:21:04,506 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117369039] [2019-11-07 01:21:04,507 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:04,507 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:04,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400009986] [2019-11-07 01:21:04,513 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:04,513 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:04,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:04,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:04,531 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 01:21:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:04,573 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-11-07 01:21:04,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:04,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:21:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:04,585 INFO L225 Difference]: With dead ends: 33 [2019-11-07 01:21:04,585 INFO L226 Difference]: Without dead ends: 17 [2019-11-07 01:21:04,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-07 01:21:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-07 01:21:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-07 01:21:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-07 01:21:04,629 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-11-07 01:21:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:04,630 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-07 01:21:04,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:04,630 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-07 01:21:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 01:21:04,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:04,631 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:04,632 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1904463274, now seen corresponding path program 1 times [2019-11-07 01:21:04,633 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:04,633 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841641673] [2019-11-07 01:21:04,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:04,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,714 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841641673] [2019-11-07 01:21:04,714 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:21:04,714 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:21:04,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042197499] [2019-11-07 01:21:04,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:21:04,716 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:04,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:21:04,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:04,717 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-11-07 01:21:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:04,728 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-11-07 01:21:04,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:21:04,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-07 01:21:04,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:04,730 INFO L225 Difference]: With dead ends: 27 [2019-11-07 01:21:04,730 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:21:04,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:21:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:21:04,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:21:04,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:21:04,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:21:04,737 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-11-07 01:21:04,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:04,738 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:21:04,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:21:04,738 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:21:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:21:04,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:04,739 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:04,739 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1479457838, now seen corresponding path program 1 times [2019-11-07 01:21:04,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:04,740 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166257671] [2019-11-07 01:21:04,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,825 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166257671] [2019-11-07 01:21:04,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442537537] [2019-11-07 01:21:04,826 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 [2019-11-07 01:21:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:04,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:21:04,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,929 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 01:21:04,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796679729] [2019-11-07 01:21:04,987 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:04,987 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:04,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:05,000 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:05,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:05,135 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:05,582 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:21:05,700 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:05,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:05,715 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:06,040 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:06,040 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-11-07 01:21:06,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045779028] [2019-11-07 01:21:06,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 01:21:06,046 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 01:21:06,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-11-07 01:21:06,048 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-11-07 01:21:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:06,768 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-11-07 01:21:06,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-07 01:21:06,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-11-07 01:21:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:06,769 INFO L225 Difference]: With dead ends: 42 [2019-11-07 01:21:06,769 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:21:06,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:21:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:21:06,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2019-11-07 01:21:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-07 01:21:06,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-07 01:21:06,786 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-11-07 01:21:06,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:06,787 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-07 01:21:06,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 01:21:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-07 01:21:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 01:21:06,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:06,789 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:06,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:06,990 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:06,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:06,991 INFO L82 PathProgramCache]: Analyzing trace with hash 689715618, now seen corresponding path program 2 times [2019-11-07 01:21:06,992 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:06,992 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078755286] [2019-11-07 01:21:06,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:07,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 01:21:07,091 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078755286] [2019-11-07 01:21:07,091 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781211662] [2019-11-07 01:21:07,091 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-07 01:21:07,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-07 01:21:07,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:07,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:21:07,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:07,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:07,171 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:21:07,217 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073104691] [2019-11-07 01:21:07,218 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:07,218 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:07,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:07,219 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:07,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:07,256 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:07,609 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:07,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:07,621 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:07,887 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:07,887 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-11-07 01:21:07,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832062231] [2019-11-07 01:21:07,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:21:07,889 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:07,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:21:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:21:07,890 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 23 states. [2019-11-07 01:21:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:08,718 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-11-07 01:21:08,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-07 01:21:08,718 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2019-11-07 01:21:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:08,720 INFO L225 Difference]: With dead ends: 48 [2019-11-07 01:21:08,720 INFO L226 Difference]: Without dead ends: 36 [2019-11-07 01:21:08,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-11-07 01:21:08,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-07 01:21:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-11-07 01:21:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:21:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-07 01:21:08,731 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2019-11-07 01:21:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:08,732 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-07 01:21:08,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:21:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-07 01:21:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 01:21:08,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:08,733 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:08,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:08,937 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1653576662, now seen corresponding path program 3 times [2019-11-07 01:21:08,938 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:08,939 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751285161] [2019-11-07 01:21:08,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:21:09,073 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751285161] [2019-11-07 01:21:09,073 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132619927] [2019-11-07 01:21:09,074 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:09,130 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:09,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:09,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:21:09,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:21:09,189 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-07 01:21:09,274 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [279972998] [2019-11-07 01:21:09,275 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:09,276 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:09,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:09,276 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:09,277 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:09,301 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:09,558 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:09,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:09,565 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:09,858 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:09,859 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 11] total 31 [2019-11-07 01:21:09,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603599572] [2019-11-07 01:21:09,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-07 01:21:09,861 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:09,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-07 01:21:09,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:21:09,862 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 31 states. [2019-11-07 01:21:11,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:11,093 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2019-11-07 01:21:11,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-07 01:21:11,093 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 23 [2019-11-07 01:21:11,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:11,094 INFO L225 Difference]: With dead ends: 60 [2019-11-07 01:21:11,095 INFO L226 Difference]: Without dead ends: 44 [2019-11-07 01:21:11,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=473, Invalid=2719, Unknown=0, NotChecked=0, Total=3192 [2019-11-07 01:21:11,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-07 01:21:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-11-07 01:21:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-07 01:21:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-07 01:21:11,106 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 23 [2019-11-07 01:21:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:11,107 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-07 01:21:11,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-07 01:21:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-07 01:21:11,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-07 01:21:11,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:11,108 INFO L410 BasicCegarLoop]: trace histogram [12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:11,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:11,312 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:11,312 INFO L82 PathProgramCache]: Analyzing trace with hash 584037126, now seen corresponding path program 4 times [2019-11-07 01:21:11,313 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:11,313 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114005154] [2019-11-07 01:21:11,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-11-07 01:21:11,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114005154] [2019-11-07 01:21:11,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628244728] [2019-11-07 01:21:11,409 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:11,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-07 01:21:11,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:21:11,651 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-07 01:21:11,992 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619571199] [2019-11-07 01:21:11,994 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:11,994 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:11,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:11,995 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:11,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:12,019 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:12,254 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:12,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:12,268 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:12,963 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:12,963 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15, 11] total 46 [2019-11-07 01:21:12,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814139933] [2019-11-07 01:21:12,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-07 01:21:12,964 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-07 01:21:12,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2019-11-07 01:21:12,966 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 46 states. [2019-11-07 01:21:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:14,870 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-11-07 01:21:14,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-07 01:21:14,870 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 31 [2019-11-07 01:21:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:14,871 INFO L225 Difference]: With dead ends: 76 [2019-11-07 01:21:14,871 INFO L226 Difference]: Without dead ends: 59 [2019-11-07 01:21:14,874 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1363, Invalid=6119, Unknown=0, NotChecked=0, Total=7482 [2019-11-07 01:21:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-07 01:21:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2019-11-07 01:21:14,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-07 01:21:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-11-07 01:21:14,885 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 31 [2019-11-07 01:21:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:14,885 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-11-07 01:21:14,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-07 01:21:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-11-07 01:21:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-07 01:21:14,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:14,887 INFO L410 BasicCegarLoop]: trace histogram [26, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:15,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:15,091 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1963452066, now seen corresponding path program 5 times [2019-11-07 01:21:15,092 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:15,092 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580258484] [2019-11-07 01:21:15,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-07 01:21:15,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580258484] [2019-11-07 01:21:15,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886583192] [2019-11-07 01:21:15,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:15,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-07 01:21:15,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:15,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 01:21:15,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:15,407 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-07 01:21:15,407 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-07 01:21:15,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [62077667] [2019-11-07 01:21:15,548 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:15,548 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:15,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:15,548 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:15,548 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:15,568 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:15,801 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:15,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:15,812 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:16,126 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:16,127 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 31 [2019-11-07 01:21:16,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699931540] [2019-11-07 01:21:16,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-07 01:21:16,130 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:16,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-07 01:21:16,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2019-11-07 01:21:16,135 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 31 states. [2019-11-07 01:21:17,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:17,297 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-11-07 01:21:17,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-07 01:21:17,298 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 46 [2019-11-07 01:21:17,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:17,299 INFO L225 Difference]: With dead ends: 78 [2019-11-07 01:21:17,299 INFO L226 Difference]: Without dead ends: 69 [2019-11-07 01:21:17,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=708, Invalid=2372, Unknown=0, NotChecked=0, Total=3080 [2019-11-07 01:21:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-07 01:21:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-11-07 01:21:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-07 01:21:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-07 01:21:17,324 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2019-11-07 01:21:17,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:17,326 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-07 01:21:17,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-07 01:21:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-07 01:21:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 01:21:17,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:17,331 INFO L410 BasicCegarLoop]: trace histogram [26, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:17,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:17,535 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:17,536 INFO L82 PathProgramCache]: Analyzing trace with hash -575920862, now seen corresponding path program 6 times [2019-11-07 01:21:17,536 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:17,536 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676706790] [2019-11-07 01:21:17,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-11-07 01:21:17,921 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676706790] [2019-11-07 01:21:17,921 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371571857] [2019-11-07 01:21:17,922 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:18,020 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:21:18,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:21:18,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-07 01:21:18,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-07 01:21:18,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-07 01:21:19,673 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [859619698] [2019-11-07 01:21:19,673 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:19,674 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:19,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:19,674 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:19,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:19,693 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:19,941 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:19,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:19,947 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:20,400 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:20,401 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 29, 11] total 85 [2019-11-07 01:21:20,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259512283] [2019-11-07 01:21:20,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-11-07 01:21:20,403 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:20,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-11-07 01:21:20,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=5362, Unknown=0, NotChecked=0, Total=7140 [2019-11-07 01:21:20,406 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 85 states. [2019-11-07 01:21:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:25,503 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2019-11-07 01:21:25,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-11-07 01:21:25,503 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 56 [2019-11-07 01:21:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:25,505 INFO L225 Difference]: With dead ends: 126 [2019-11-07 01:21:25,505 INFO L226 Difference]: Without dead ends: 98 [2019-11-07 01:21:25,512 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6399 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=5366, Invalid=21694, Unknown=0, NotChecked=0, Total=27060 [2019-11-07 01:21:25,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-07 01:21:25,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2019-11-07 01:21:25,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-07 01:21:25,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2019-11-07 01:21:25,524 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 56 [2019-11-07 01:21:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:25,524 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2019-11-07 01:21:25,525 INFO L463 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-11-07 01:21:25,525 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2019-11-07 01:21:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-07 01:21:25,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:25,527 INFO L410 BasicCegarLoop]: trace histogram [54, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:25,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:25,731 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash -2105438330, now seen corresponding path program 7 times [2019-11-07 01:21:25,731 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:25,732 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100549087] [2019-11-07 01:21:25,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2019-11-07 01:21:26,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100549087] [2019-11-07 01:21:26,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246456915] [2019-11-07 01:21:26,180 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:26,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 56 conjunts are in the unsatisfiable core [2019-11-07 01:21:26,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:21:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-07 01:21:28,071 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:21:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-07 01:21:32,890 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044321238] [2019-11-07 01:21:32,892 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:21:32,892 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:21:32,893 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:21:32,893 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:21:32,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:21:32,911 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:21:33,129 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-07 01:21:33,165 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-11-07 01:21:33,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:21:33,171 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:21:33,773 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:21:33,773 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 57, 57, 11] total 142 [2019-11-07 01:21:33,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989846541] [2019-11-07 01:21:33,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-11-07 01:21:33,775 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:21:33,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-11-07 01:21:33,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6475, Invalid=13547, Unknown=0, NotChecked=0, Total=20022 [2019-11-07 01:21:33,783 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 142 states. [2019-11-07 01:21:46,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:21:46,227 INFO L93 Difference]: Finished difference Result 184 states and 244 transitions. [2019-11-07 01:21:46,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2019-11-07 01:21:46,230 INFO L78 Accepts]: Start accepts. Automaton has 142 states. Word has length 85 [2019-11-07 01:21:46,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:21:46,231 INFO L225 Difference]: With dead ends: 184 [2019-11-07 01:21:46,232 INFO L226 Difference]: Without dead ends: 155 [2019-11-07 01:21:46,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16638 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=19459, Invalid=58103, Unknown=0, NotChecked=0, Total=77562 [2019-11-07 01:21:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-11-07 01:21:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2019-11-07 01:21:46,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-11-07 01:21:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2019-11-07 01:21:46,254 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 85 [2019-11-07 01:21:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:21:46,254 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2019-11-07 01:21:46,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 142 states. [2019-11-07 01:21:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2019-11-07 01:21:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-07 01:21:46,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:21:46,257 INFO L410 BasicCegarLoop]: trace histogram [110, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:21:46,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:21:46,461 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:21:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:21:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1565949278, now seen corresponding path program 8 times [2019-11-07 01:21:46,462 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:21:46,462 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673206441] [2019-11-07 01:21:46,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:21:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:21:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2019-11-07 01:21:46,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673206441] [2019-11-07 01:21:46,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224110227] [2019-11-07 01:21:46,883 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true