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/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:02:48,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:02:48,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:02:48,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:02:48,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:02:48,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:02:48,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:02:48,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:02:48,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:02:48,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:02:48,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:02:48,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:02:48,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:02:48,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:02:48,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:02:48,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:02:48,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:02:48,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:02:48,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:02:48,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:02:48,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:02:48,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:02:48,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:02:48,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:02:48,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:02:48,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:02:48,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:02:48,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:02:48,427 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 03:02:48,452 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:02:48,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:02:48,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:02:48,455 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:02:48,455 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:02:48,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:02:48,455 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:02:48,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:02:48,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:02:48,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:02:48,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:02:48,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:02:48,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:02:48,458 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:02:48,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:02:48,458 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:02:48,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:02:48,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:02:48,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:02:48,459 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:02:48,460 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:02:48,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:02:48,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:02:48,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:02:48,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:02:48,461 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:02:48,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:02:48,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:02:48,461 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 03:02:48,794 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:02:48,804 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:02:48,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:02:48,809 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:02:48,810 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:02:48,811 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2019-10-15 03:02:48,885 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084351fe6/f03cc81c085a4fd191f06ed837932639/FLAGca6d1a7bf [2019-10-15 03:02:49,380 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:02:49,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2019-10-15 03:02:49,388 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084351fe6/f03cc81c085a4fd191f06ed837932639/FLAGca6d1a7bf [2019-10-15 03:02:49,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/084351fe6/f03cc81c085a4fd191f06ed837932639 [2019-10-15 03:02:49,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:02:49,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:02:49,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:49,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:02:49,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:02:49,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:49,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3686b925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49, skipping insertion in model container [2019-10-15 03:02:49,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:49,746 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:02:49,762 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:02:49,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:49,949 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:02:49,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:49,987 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:02:49,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49 WrapperNode [2019-10-15 03:02:49,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:49,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:02:49,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:02:49,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:02:50,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:50,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:50,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:50,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:50,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:50,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:50,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (1/1) ... [2019-10-15 03:02:50,124 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:02:50,124 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:02:50,125 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:02:50,125 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:02:50,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (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 03:02:50,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:02:50,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:02:50,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:02:50,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:02:50,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:02:50,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:02:50,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:02:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:02:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:02:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:02:50,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:02:50,415 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:02:50,415 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:02:50,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:50 BoogieIcfgContainer [2019-10-15 03:02:50,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:02:50,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:02:50,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:02:50,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:02:50,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:02:49" (1/3) ... [2019-10-15 03:02:50,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72270f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:50, skipping insertion in model container [2019-10-15 03:02:50,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:49" (2/3) ... [2019-10-15 03:02:50,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72270f30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:50, skipping insertion in model container [2019-10-15 03:02:50,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:50" (3/3) ... [2019-10-15 03:02:50,426 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2019-10-15 03:02:50,436 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:02:50,443 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:02:50,454 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:02:50,481 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:02:50,481 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:02:50,482 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:02:50,482 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:02:50,482 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:02:50,482 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:02:50,483 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:02:50,483 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:02:50,506 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 03:02:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:02:50,515 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:50,516 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:50,517 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:50,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:50,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1022443096, now seen corresponding path program 1 times [2019-10-15 03:02:50,531 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:50,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39830850] [2019-10-15 03:02:50,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,531 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:50,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:50,634 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 03:02:50,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39830850] [2019-10-15 03:02:50,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:02:50,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:02:50,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89415059] [2019-10-15 03:02:50,643 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:02:50,644 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:50,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:02:50,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:02:50,664 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2019-10-15 03:02:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:50,686 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-15 03:02:50,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:02:50,687 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 03:02:50,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:50,694 INFO L225 Difference]: With dead ends: 29 [2019-10-15 03:02:50,695 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 03:02:50,698 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:02:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 03:02:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 03:02:50,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 03:02:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 03:02:50,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 03:02:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:50,739 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 03:02:50,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:02:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 03:02:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:02:50,741 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:50,741 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:50,741 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1666502658, now seen corresponding path program 1 times [2019-10-15 03:02:50,742 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:50,742 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998629348] [2019-10-15 03:02:50,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,743 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:50,834 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 03:02:50,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998629348] [2019-10-15 03:02:50,835 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:02:50,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:02:50,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427199904] [2019-10-15 03:02:50,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:02:50,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:02:50,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:02:50,839 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 4 states. [2019-10-15 03:02:50,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:50,969 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-15 03:02:50,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 03:02:50,970 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 03:02:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:50,971 INFO L225 Difference]: With dead ends: 20 [2019-10-15 03:02:50,971 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:02:50,972 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:02:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:02:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-10-15 03:02:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-15 03:02:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-15 03:02:50,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-10-15 03:02:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:50,978 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-15 03:02:50,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:02:50,978 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-15 03:02:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 03:02:50,979 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:50,979 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:50,980 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:50,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1396448135, now seen corresponding path program 1 times [2019-10-15 03:02:50,980 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:50,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013860759] [2019-10-15 03:02:50,981 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,981 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,981 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:51,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013860759] [2019-10-15 03:02:51,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751270146] [2019-10-15 03:02:51,084 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 03:02:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:51,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:02:51,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:51,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:51,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:51,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:51,343 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:51,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:51,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:51,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:51,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:51,462 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:51,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219251456] [2019-10-15 03:02:51,609 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:51,614 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:51,634 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:51,646 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:51,648 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:51,717 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:51,990 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:52,022 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:52,026 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:52,372 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:52,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6, 7] total 19 [2019-10-15 03:02:52,373 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397551805] [2019-10-15 03:02:52,374 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 03:02:52,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 03:02:52,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:02:52,376 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 19 states. [2019-10-15 03:02:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:52,742 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2019-10-15 03:02:52,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 03:02:52,743 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 13 [2019-10-15 03:02:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:52,745 INFO L225 Difference]: With dead ends: 25 [2019-10-15 03:02:52,746 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:02:52,748 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2019-10-15 03:02:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:02:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:02:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:02:52,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-15 03:02:52,759 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2019-10-15 03:02:52,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:52,760 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-15 03:02:52,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 03:02:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-15 03:02:52,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 03:02:52,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:52,762 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:52,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:52,970 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:52,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:52,970 INFO L82 PathProgramCache]: Analyzing trace with hash -927306090, now seen corresponding path program 2 times [2019-10-15 03:02:52,971 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:52,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813655108] [2019-10-15 03:02:52,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:52,972 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:52,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:53,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:53,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813655108] [2019-10-15 03:02:53,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604104427] [2019-10-15 03:02:53,138 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 [2019-10-15 03:02:53,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 03:02:53,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:53,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 03:02:53,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:53,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:53,192 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:53,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1983151946] [2019-10-15 03:02:53,460 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:53,466 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:53,467 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:53,468 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:53,468 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:53,488 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:53,619 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:53,658 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:53,664 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:53,879 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:53,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 7] total 20 [2019-10-15 03:02:53,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043665289] [2019-10-15 03:02:53,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 03:02:53,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:53,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 03:02:53,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-10-15 03:02:53,885 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 20 states. [2019-10-15 03:02:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:54,529 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2019-10-15 03:02:54,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-15 03:02:54,532 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 19 [2019-10-15 03:02:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:54,533 INFO L225 Difference]: With dead ends: 37 [2019-10-15 03:02:54,533 INFO L226 Difference]: Without dead ends: 32 [2019-10-15 03:02:54,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=244, Invalid=686, Unknown=0, NotChecked=0, Total=930 [2019-10-15 03:02:54,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-15 03:02:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-15 03:02:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 03:02:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-15 03:02:54,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2019-10-15 03:02:54,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:54,543 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-15 03:02:54,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-15 03:02:54,543 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-15 03:02:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 03:02:54,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:54,545 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:54,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:54,750 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash 62074612, now seen corresponding path program 3 times [2019-10-15 03:02:54,751 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:54,755 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500880325] [2019-10-15 03:02:54,755 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:54,755 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:54,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:54,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:55,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500880325] [2019-10-15 03:02:55,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301164616] [2019-10-15 03:02:55,051 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 [2019-10-15 03:02:55,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:02:55,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:55,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:02:55,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:55,170 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:55,170 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:55,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575561249] [2019-10-15 03:02:55,500 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:55,500 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:55,500 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:55,501 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:55,501 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:55,523 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:55,623 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:55,665 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:55,672 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:56,029 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:56,030 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 7] total 32 [2019-10-15 03:02:56,030 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419390431] [2019-10-15 03:02:56,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-15 03:02:56,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:56,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-15 03:02:56,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=721, Unknown=0, NotChecked=0, Total=992 [2019-10-15 03:02:56,039 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 32 states. [2019-10-15 03:02:57,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:57,249 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2019-10-15 03:02:57,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 03:02:57,250 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 31 [2019-10-15 03:02:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:57,252 INFO L225 Difference]: With dead ends: 61 [2019-10-15 03:02:57,252 INFO L226 Difference]: Without dead ends: 56 [2019-10-15 03:02:57,254 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=892, Invalid=2078, Unknown=0, NotChecked=0, Total=2970 [2019-10-15 03:02:57,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-15 03:02:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-10-15 03:02:57,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-15 03:02:57,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2019-10-15 03:02:57,264 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 31 [2019-10-15 03:02:57,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:57,265 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2019-10-15 03:02:57,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-15 03:02:57,265 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2019-10-15 03:02:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 03:02:57,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:57,267 INFO L380 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:57,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:57,475 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash -98740048, now seen corresponding path program 4 times [2019-10-15 03:02:57,476 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:57,477 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220697634] [2019-10-15 03:02:57,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:57,477 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:57,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:58,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220697634] [2019-10-15 03:02:58,025 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614023521] [2019-10-15 03:02:58,026 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 [2019-10-15 03:02:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:58,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 03:02:58,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:58,107 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:58,108 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:59,048 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1034867345] [2019-10-15 03:02:59,050 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:02:59,050 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:59,050 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:59,050 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:59,051 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:59,065 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:59,120 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:59,135 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:59,137 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:59,457 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:59,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 7] total 56 [2019-10-15 03:02:59,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927944426] [2019-10-15 03:02:59,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-10-15 03:02:59,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:59,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-10-15 03:02:59,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1087, Invalid=1993, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 03:02:59,463 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 56 states. [2019-10-15 03:03:03,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:03,221 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2019-10-15 03:03:03,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-15 03:03:03,221 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 55 [2019-10-15 03:03:03,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:03,223 INFO L225 Difference]: With dead ends: 109 [2019-10-15 03:03:03,223 INFO L226 Difference]: Without dead ends: 104 [2019-10-15 03:03:03,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3484, Invalid=7022, Unknown=0, NotChecked=0, Total=10506 [2019-10-15 03:03:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-15 03:03:03,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-10-15 03:03:03,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-15 03:03:03,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2019-10-15 03:03:03,251 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 55 [2019-10-15 03:03:03,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:03,251 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2019-10-15 03:03:03,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-10-15 03:03:03,252 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2019-10-15 03:03:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-15 03:03:03,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:03,255 INFO L380 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:03,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:03,459 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:03,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:03,459 INFO L82 PathProgramCache]: Analyzing trace with hash 259412008, now seen corresponding path program 5 times [2019-10-15 03:03:03,460 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:03,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555199820] [2019-10-15 03:03:03,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:03,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:03,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:04,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555199820] [2019-10-15 03:03:04,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093051076] [2019-10-15 03:03:04,916 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 [2019-10-15 03:03:05,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2019-10-15 03:03:05,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:05,073 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 50 conjunts are in the unsatisfiable core [2019-10-15 03:03:05,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:05,110 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:06,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2050152326] [2019-10-15 03:03:06,793 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 03:03:06,794 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:06,794 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:06,794 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:06,795 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:06,813 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:06,883 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:06,898 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:06,901 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:07,246 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:07,246 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50, 7] total 61 [2019-10-15 03:03:07,246 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441477681] [2019-10-15 03:03:07,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-10-15 03:03:07,248 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:07,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-10-15 03:03:07,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=2352, Unknown=0, NotChecked=0, Total=3660 [2019-10-15 03:03:07,250 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand 61 states. [2019-10-15 03:03:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:10,739 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2019-10-15 03:03:10,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-15 03:03:10,739 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 103 [2019-10-15 03:03:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:10,742 INFO L225 Difference]: With dead ends: 117 [2019-10-15 03:03:10,742 INFO L226 Difference]: Without dead ends: 112 [2019-10-15 03:03:10,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 256 SyntacticMatches, 43 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2868 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4161, Invalid=8271, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 03:03:10,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-15 03:03:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2019-10-15 03:03:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-15 03:03:10,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2019-10-15 03:03:10,760 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 103 [2019-10-15 03:03:10,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:10,762 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2019-10-15 03:03:10,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-10-15 03:03:10,763 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2019-10-15 03:03:10,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-15 03:03:10,764 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:10,765 INFO L380 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:10,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:10,968 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:10,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:10,969 INFO L82 PathProgramCache]: Analyzing trace with hash -41654084, now seen corresponding path program 6 times [2019-10-15 03:03:10,969 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:10,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746014289] [2019-10-15 03:03:10,970 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:10,970 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:10,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:14,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:14,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746014289] [2019-10-15 03:03:14,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228079018] [2019-10-15 03:03:14,862 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 [2019-10-15 03:03:14,962 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:03:14,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:14,968 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 154 conjunts are in the unsatisfiable core [2019-10-15 03:03:14,976 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 0 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:25,893 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:27,934 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-10-15 03:03:28,420 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2019-10-15 03:03:28,955 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2019-10-15 03:03:29,476 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2019-10-15 03:03:30,035 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 65 [2019-10-15 03:03:30,648 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2019-10-15 03:03:31,333 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2019-10-15 03:03:32,106 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2019-10-15 03:03:33,016 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2019-10-15 03:03:33,895 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 92 [2019-10-15 03:03:34,879 WARN L191 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 96 [2019-10-15 03:03:35,864 WARN L191 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 102 [2019-10-15 03:03:36,910 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 106