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 0.1.24-13a467a-m [2019-10-15 01:32:08,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:32:08,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:32:08,368 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:32:08,369 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:32:08,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:32:08,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:32:08,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:32:08,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:32:08,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:32:08,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:32:08,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:32:08,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:32:08,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:32:08,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:32:08,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:32:08,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:32:08,402 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:32:08,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:32:08,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:32:08,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:32:08,416 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:32:08,417 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:32:08,418 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:32:08,423 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:32:08,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:32:08,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:32:08,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:32:08,437 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:32:08,455 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:32:08,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:32:08,458 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:32:08,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:32:08,458 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:32:08,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:32:08,459 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:32:08,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:32:08,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:32:08,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:32:08,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:32:08,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:32:08,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:32:08,461 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:32:08,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:32:08,462 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:32:08,462 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:32:08,462 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:32:08,462 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:32:08,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:32:08,463 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:32:08,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:08,463 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:32:08,463 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:32:08,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:32:08,464 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:32:08,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:32:08,464 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:32:08,464 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:32:08,772 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:32:08,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:32:08,788 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:32:08,790 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:32:08,790 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:32:08,791 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-10-15 01:32:08,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8732b45db/0aec2eba72cc407fa0750267efc6f4aa/FLAG06e29cc5e [2019-10-15 01:32:09,347 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:32:09,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy1_ground-1.i [2019-10-15 01:32:09,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8732b45db/0aec2eba72cc407fa0750267efc6f4aa/FLAG06e29cc5e [2019-10-15 01:32:09,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8732b45db/0aec2eba72cc407fa0750267efc6f4aa [2019-10-15 01:32:09,724 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:32:09,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:32:09,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:09,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:32:09,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:32:09,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:09,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78605420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09, skipping insertion in model container [2019-10-15 01:32:09,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:09,742 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:32:09,759 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:32:09,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:09,932 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:32:09,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:32:09,974 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:32:09,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09 WrapperNode [2019-10-15 01:32:09,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:32:09,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:32:09,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:32:09,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:32:10,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:10,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:10,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:10,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:10,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:10,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:10,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... [2019-10-15 01:32:10,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:32:10,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:32:10,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:32:10,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:32:10,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:32:10,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:32:10,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:32:10,171 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:32:10,171 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:32:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:32:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:32:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:32:10,171 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:32:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:32:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:32:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:32:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:32:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:32:10,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:32:10,494 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:32:10,495 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:32:10,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:10 BoogieIcfgContainer [2019-10-15 01:32:10,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:32:10,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:32:10,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:32:10,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:32:10,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:32:09" (1/3) ... [2019-10-15 01:32:10,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78500f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:10, skipping insertion in model container [2019-10-15 01:32:10,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:32:09" (2/3) ... [2019-10-15 01:32:10,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78500f31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:32:10, skipping insertion in model container [2019-10-15 01:32:10,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:32:10" (3/3) ... [2019-10-15 01:32:10,504 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy1_ground-1.i [2019-10-15 01:32:10,511 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:32:10,518 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:32:10,530 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:32:10,551 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:32:10,552 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:32:10,552 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:32:10,552 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:32:10,552 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:32:10,552 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:32:10,552 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:32:10,552 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:32:10,567 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:32:10,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:32:10,572 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:10,573 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:10,575 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:10,580 INFO L82 PathProgramCache]: Analyzing trace with hash -973561822, now seen corresponding path program 1 times [2019-10-15 01:32:10,587 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:10,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884795805] [2019-10-15 01:32:10,587 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,588 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:32:10,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884795805] [2019-10-15 01:32:10,738 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:10,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:10,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693987838] [2019-10-15 01:32:10,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:10,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:10,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:10,756 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:32:10,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:10,791 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2019-10-15 01:32:10,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:10,793 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:32:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:10,801 INFO L225 Difference]: With dead ends: 33 [2019-10-15 01:32:10,801 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:32:10,808 INFO L600 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 [2019-10-15 01:32:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:32:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:32:10,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:32:10,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:32:10,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-15 01:32:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:10,844 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:32:10,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:32:10,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:32:10,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:10,845 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:10,846 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:10,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:10,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1904463274, now seen corresponding path program 1 times [2019-10-15 01:32:10,847 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:10,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137490648] [2019-10-15 01:32:10,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:10,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137490648] [2019-10-15 01:32:10,920 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:32:10,921 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:32:10,921 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571874649] [2019-10-15 01:32:10,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:32:10,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:10,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:32:10,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:32:10,924 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2019-10-15 01:32:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:10,935 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-10-15 01:32:10,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:32:10,936 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 01:32:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:10,937 INFO L225 Difference]: With dead ends: 27 [2019-10-15 01:32:10,937 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:32:10,938 INFO L600 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 [2019-10-15 01:32:10,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:32:10,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:32:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:32:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:32:10,944 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-10-15 01:32:10,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:10,944 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:32:10,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:32:10,945 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:32:10,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:32:10,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:10,946 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:10,946 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:10,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:10,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1479457838, now seen corresponding path program 1 times [2019-10-15 01:32:10,947 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:10,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786684528] [2019-10-15 01:32:10,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,948 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:10,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:11,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786684528] [2019-10-15 01:32:11,017 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218525712] [2019-10-15 01:32:11,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:11,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:32:11,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:11,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:11,126 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:32:11,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1607935263] [2019-10-15 01:32:11,209 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:11,209 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:11,217 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:11,227 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:11,227 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:11,385 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:11,884 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-10-15 01:32:12,010 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:12,024 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:12,031 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:12,387 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:12,387 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 18 [2019-10-15 01:32:12,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147414864] [2019-10-15 01:32:12,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 01:32:12,390 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:12,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 01:32:12,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:32:12,391 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 18 states. [2019-10-15 01:32:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:13,064 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-10-15 01:32:13,065 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-15 01:32:13,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2019-10-15 01:32:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:13,066 INFO L225 Difference]: With dead ends: 42 [2019-10-15 01:32:13,066 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:32:13,068 INFO L600 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 [2019-10-15 01:32:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:32:13,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2019-10-15 01:32:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:32:13,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-15 01:32:13,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-10-15 01:32:13,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:13,076 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-15 01:32:13,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 01:32:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-15 01:32:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:32:13,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:13,077 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:13,282 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:13,282 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:13,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:13,283 INFO L82 PathProgramCache]: Analyzing trace with hash 689715618, now seen corresponding path program 2 times [2019-10-15 01:32:13,283 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:13,284 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693204448] [2019-10-15 01:32:13,284 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:13,285 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:13,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:32:13,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693204448] [2019-10-15 01:32:13,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412733673] [2019-10-15 01:32:13,382 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 01:32:13,428 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:32:13,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:13,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:32:13,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:13,458 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:32:13,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400789812] [2019-10-15 01:32:13,501 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:13,501 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:13,502 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:13,502 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:13,502 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:13,533 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:13,854 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:13,873 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:13,879 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:14,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:14,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5, 11] total 23 [2019-10-15 01:32:14,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946330979] [2019-10-15 01:32:14,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:32:14,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:14,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:32:14,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:32:14,229 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 23 states. [2019-10-15 01:32:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:15,018 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2019-10-15 01:32:15,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 01:32:15,019 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2019-10-15 01:32:15,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:15,020 INFO L225 Difference]: With dead ends: 48 [2019-10-15 01:32:15,020 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 01:32:15,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1403, Unknown=0, NotChecked=0, Total=1640 [2019-10-15 01:32:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 01:32:15,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2019-10-15 01:32:15,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:32:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-15 01:32:15,034 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2019-10-15 01:32:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:15,034 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-15 01:32:15,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:32:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-15 01:32:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:32:15,036 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:15,036 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:15,240 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:15,240 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:15,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:15,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1653576662, now seen corresponding path program 3 times [2019-10-15 01:32:15,241 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:15,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665431554] [2019-10-15 01:32:15,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:15,242 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:15,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:32:15,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665431554] [2019-10-15 01:32:15,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328776082] [2019-10-15 01:32:15,340 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 01:32:15,408 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:15,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:15,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:32:15,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:15,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:32:15,482 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:32:15,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170150374] [2019-10-15 01:32:15,580 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:15,580 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:15,580 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:15,581 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:15,581 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:15,624 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:15,917 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:15,927 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:15,936 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:16,350 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:16,350 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 11] total 31 [2019-10-15 01:32:16,350 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514807100] [2019-10-15 01:32:16,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 01:32:16,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:16,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 01:32:16,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:16,353 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 31 states. [2019-10-15 01:32:17,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:17,592 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2019-10-15 01:32:17,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-15 01:32:17,594 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 23 [2019-10-15 01:32:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:17,595 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:32:17,595 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 01:32:17,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=473, Invalid=2719, Unknown=0, NotChecked=0, Total=3192 [2019-10-15 01:32:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 01:32:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2019-10-15 01:32:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 01:32:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-10-15 01:32:17,606 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 23 [2019-10-15 01:32:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:17,607 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-10-15 01:32:17,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 01:32:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-10-15 01:32:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 01:32:17,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:17,608 INFO L380 BasicCegarLoop]: trace histogram [12, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:17,811 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:17,812 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash 584037126, now seen corresponding path program 4 times [2019-10-15 01:32:17,813 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:17,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074283263] [2019-10-15 01:32:17,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:17,814 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:17,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2019-10-15 01:32:17,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074283263] [2019-10-15 01:32:17,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194662603] [2019-10-15 01:32:17,908 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 01:32:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:17,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 01:32:17,985 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:18,124 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:18,124 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-10-15 01:32:18,388 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1616429059] [2019-10-15 01:32:18,389 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:18,389 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:18,390 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:18,390 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:18,390 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:18,417 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:18,685 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:18,694 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:18,700 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:19,088 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:19,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15, 11] total 46 [2019-10-15 01:32:19,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356890200] [2019-10-15 01:32:19,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-15 01:32:19,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:19,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-15 01:32:19,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1619, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 01:32:19,093 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 46 states. [2019-10-15 01:32:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:21,021 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-15 01:32:21,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-15 01:32:21,021 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 31 [2019-10-15 01:32:21,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:21,023 INFO L225 Difference]: With dead ends: 76 [2019-10-15 01:32:21,023 INFO L226 Difference]: Without dead ends: 59 [2019-10-15 01:32:21,027 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1363, Invalid=6119, Unknown=0, NotChecked=0, Total=7482 [2019-10-15 01:32:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-15 01:32:21,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2019-10-15 01:32:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 01:32:21,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2019-10-15 01:32:21,045 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 31 [2019-10-15 01:32:21,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:21,045 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2019-10-15 01:32:21,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-15 01:32:21,045 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2019-10-15 01:32:21,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 01:32:21,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:21,049 INFO L380 BasicCegarLoop]: trace histogram [26, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:21,252 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:21,253 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:21,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1963452066, now seen corresponding path program 5 times [2019-10-15 01:32:21,254 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:21,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354141402] [2019-10-15 01:32:21,254 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:21,255 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:21,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:32:21,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354141402] [2019-10-15 01:32:21,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029575743] [2019-10-15 01:32:21,443 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 01:32:21,592 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-15 01:32:21,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:21,593 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-15 01:32:21,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:32:21,614 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 387 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:32:21,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1136381025] [2019-10-15 01:32:21,784 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:21,784 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:21,785 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:21,785 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:21,785 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:21,812 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:22,034 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:22,040 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:22,043 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:22,320 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:22,320 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11] total 31 [2019-10-15 01:32:22,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945939150] [2019-10-15 01:32:22,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-15 01:32:22,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:22,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-15 01:32:22,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=691, Unknown=0, NotChecked=0, Total=930 [2019-10-15 01:32:22,324 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 31 states. [2019-10-15 01:32:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:23,427 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-10-15 01:32:23,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-15 01:32:23,428 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 46 [2019-10-15 01:32:23,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:23,430 INFO L225 Difference]: With dead ends: 78 [2019-10-15 01:32:23,430 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 01:32:23,432 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=708, Invalid=2372, Unknown=0, NotChecked=0, Total=3080 [2019-10-15 01:32:23,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 01:32:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-10-15 01:32:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:32:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-15 01:32:23,441 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 46 [2019-10-15 01:32:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:23,441 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-15 01:32:23,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-15 01:32:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-15 01:32:23,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:32:23,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:23,443 INFO L380 BasicCegarLoop]: trace histogram [26, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:23,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:23,647 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:23,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:23,648 INFO L82 PathProgramCache]: Analyzing trace with hash -575920862, now seen corresponding path program 6 times [2019-10-15 01:32:23,648 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:23,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961779482] [2019-10-15 01:32:23,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:23,649 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:23,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-15 01:32:23,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961779482] [2019-10-15 01:32:23,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409344728] [2019-10-15 01:32:23,959 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 01:32:24,066 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:32:24,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:32:24,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-15 01:32:24,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:24,829 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-15 01:32:24,830 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-15 01:32:26,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102308957] [2019-10-15 01:32:26,403 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:26,404 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:26,404 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:26,404 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:26,405 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:26,427 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:26,663 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:26,669 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:26,676 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:27,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:27,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 29, 29, 11] total 85 [2019-10-15 01:32:27,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014156273] [2019-10-15 01:32:27,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2019-10-15 01:32:27,155 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2019-10-15 01:32:27,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1778, Invalid=5362, Unknown=0, NotChecked=0, Total=7140 [2019-10-15 01:32:27,158 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 85 states. [2019-10-15 01:32:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:32:31,975 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2019-10-15 01:32:31,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-10-15 01:32:31,975 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 56 [2019-10-15 01:32:31,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:32:31,977 INFO L225 Difference]: With dead ends: 126 [2019-10-15 01:32:31,978 INFO L226 Difference]: Without dead ends: 98 [2019-10-15 01:32:31,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6399 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=5366, Invalid=21694, Unknown=0, NotChecked=0, Total=27060 [2019-10-15 01:32:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-15 01:32:31,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2019-10-15 01:32:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-15 01:32:31,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2019-10-15 01:32:31,997 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 56 [2019-10-15 01:32:31,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:32:31,997 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2019-10-15 01:32:31,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 85 states. [2019-10-15 01:32:31,997 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2019-10-15 01:32:31,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-15 01:32:31,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:32:31,999 INFO L380 BasicCegarLoop]: trace histogram [54, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:32:32,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:32:32,203 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:32:32,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:32:32,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2105438330, now seen corresponding path program 7 times [2019-10-15 01:32:32,204 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:32:32,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673046108] [2019-10-15 01:32:32,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:32,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:32:32,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:32:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2019-10-15 01:32:32,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673046108] [2019-10-15 01:32:32,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871275720] [2019-10-15 01:32:32,617 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 [2019-10-15 01:32:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:32:32,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 56 conjunts are in the unsatisfiable core [2019-10-15 01:32:32,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:32:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-15 01:32:34,678 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:32:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1675 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-10-15 01:32:38,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1018146601] [2019-10-15 01:32:38,499 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:32:38,499 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:32:38,500 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:32:38,500 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:32:38,500 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:32:38,520 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:32:38,760 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:32:38,766 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:32:38,769 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:32:39,423 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:32:39,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 57, 57, 11] total 142 [2019-10-15 01:32:39,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082955190] [2019-10-15 01:32:39,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 142 states [2019-10-15 01:32:39,425 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:32:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2019-10-15 01:32:39,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6475, Invalid=13547, Unknown=0, NotChecked=0, Total=20022 [2019-10-15 01:32:39,433 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand 142 states.