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_init5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:34:05,331 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:34:05,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:34:05,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:34:05,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:34:05,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:34:05,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:34:05,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:34:05,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:34:05,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:34:05,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:34:05,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:34:05,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:34:05,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:34:05,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:34:05,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:34:05,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:34:05,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:34:05,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:34:05,392 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:34:05,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:34:05,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:34:05,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:34:05,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:34:05,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:34:05,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:34:05,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:34:05,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:34:05,419 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 01:34:05,446 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:34:05,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:34:05,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:34:05,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:34:05,449 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:34:05,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:34:05,449 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:34:05,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:34:05,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:34:05,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:34:05,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:34:05,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:34:05,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:34:05,452 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:34:05,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:34:05,452 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:34:05,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:34:05,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:34:05,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:34:05,453 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:34:05,453 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:34:05,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:34:05,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:34:05,454 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:34:05,454 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:34:05,454 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:34:05,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:34:05,454 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:34:05,455 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 01:34:05,718 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:34:05,731 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:34:05,735 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:34:05,736 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:34:05,737 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:34:05,737 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2019-10-15 01:34:05,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6348611e/009088fb855b4f0aba86c87f8fa5a902/FLAGb0cfdc194 [2019-10-15 01:34:06,268 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:34:06,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init5_ground-2.i [2019-10-15 01:34:06,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6348611e/009088fb855b4f0aba86c87f8fa5a902/FLAGb0cfdc194 [2019-10-15 01:34:06,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6348611e/009088fb855b4f0aba86c87f8fa5a902 [2019-10-15 01:34:06,664 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:34:06,666 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:34:06,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:06,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:34:06,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:34:06,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,675 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc525ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06, skipping insertion in model container [2019-10-15 01:34:06,675 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:06,683 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:34:06,701 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:34:06,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:06,891 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:34:06,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:34:06,931 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:34:06,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06 WrapperNode [2019-10-15 01:34:06,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:34:06,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:34:06,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:34:06,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:34:07,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (1/1) ... [2019-10-15 01:34:07,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:34:07,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:34:07,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:34:07,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:34:07,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (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 01:34:07,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:34:07,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:34:07,107 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:34:07,107 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:34:07,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:34:07,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:34:07,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:34:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:34:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:34:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:34:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:34:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:34:07,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:34:07,497 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:34:07,498 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:34:07,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:07 BoogieIcfgContainer [2019-10-15 01:34:07,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:34:07,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:34:07,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:34:07,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:34:07,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:34:06" (1/3) ... [2019-10-15 01:34:07,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194e54be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:07, skipping insertion in model container [2019-10-15 01:34:07,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:34:06" (2/3) ... [2019-10-15 01:34:07,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194e54be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:34:07, skipping insertion in model container [2019-10-15 01:34:07,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:34:07" (3/3) ... [2019-10-15 01:34:07,508 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-2.i [2019-10-15 01:34:07,517 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:34:07,524 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:34:07,535 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:34:07,558 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:34:07,558 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:34:07,558 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:34:07,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:34:07,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:34:07,559 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:34:07,559 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:34:07,559 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:34:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:34:07,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:34:07,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:07,584 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:07,587 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:07,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:07,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2033634507, now seen corresponding path program 1 times [2019-10-15 01:34:07,602 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:07,602 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613874649] [2019-10-15 01:34:07,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,603 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:07,761 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 01:34:07,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613874649] [2019-10-15 01:34:07,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:34:07,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:34:07,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126901574] [2019-10-15 01:34:07,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:34:07,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:34:07,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:34:07,791 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-10-15 01:34:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:07,880 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2019-10-15 01:34:07,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:34:07,883 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-15 01:34:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:07,893 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:34:07,894 INFO L226 Difference]: Without dead ends: 24 [2019-10-15 01:34:07,897 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 01:34:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-15 01:34:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-15 01:34:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:34:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2019-10-15 01:34:07,944 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2019-10-15 01:34:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:07,944 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2019-10-15 01:34:07,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:34:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2019-10-15 01:34:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:34:07,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:07,946 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:07,947 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:07,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:07,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2054156691, now seen corresponding path program 1 times [2019-10-15 01:34:07,948 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:07,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847077599] [2019-10-15 01:34:07,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,949 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:07,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:07,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:34:08,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847077599] [2019-10-15 01:34:08,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381337921] [2019-10-15 01:34:08,084 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 01:34:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:08,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:34:08,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:34:08,195 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:34:08,239 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1170254243] [2019-10-15 01:34:08,271 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:08,272 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:08,299 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:08,311 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:08,312 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:08,470 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:09,474 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:09,489 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:09,505 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:10,131 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:10,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:34:10,131 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775065164] [2019-10-15 01:34:10,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:34:10,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:10,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:34:10,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:34:10,136 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 17 states. [2019-10-15 01:34:11,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:11,137 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2019-10-15 01:34:11,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:34:11,138 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2019-10-15 01:34:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:11,140 INFO L225 Difference]: With dead ends: 65 [2019-10-15 01:34:11,140 INFO L226 Difference]: Without dead ends: 48 [2019-10-15 01:34:11,145 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:34:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-15 01:34:11,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2019-10-15 01:34:11,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 01:34:11,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-10-15 01:34:11,167 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2019-10-15 01:34:11,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:11,170 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-10-15 01:34:11,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:34:11,171 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-10-15 01:34:11,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-15 01:34:11,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:11,174 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:11,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:11,376 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:11,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:11,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1023410357, now seen corresponding path program 2 times [2019-10-15 01:34:11,377 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:11,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658601566] [2019-10-15 01:34:11,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:11,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:34:11,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658601566] [2019-10-15 01:34:11,527 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200801046] [2019-10-15 01:34:11,527 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 01:34:11,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:34:11,603 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:11,604 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:34:11,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:34:11,630 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:11,692 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-15 01:34:11,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305431996] [2019-10-15 01:34:11,694 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:11,695 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:11,695 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:11,695 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:11,696 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:11,735 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:12,490 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:12,500 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:12,504 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:13,165 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:13,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:34:13,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12627006] [2019-10-15 01:34:13,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:34:13,168 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:13,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:34:13,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:34:13,169 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 23 states. [2019-10-15 01:34:14,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:14,227 INFO L93 Difference]: Finished difference Result 107 states and 146 transitions. [2019-10-15 01:34:14,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:34:14,228 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2019-10-15 01:34:14,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:14,230 INFO L225 Difference]: With dead ends: 107 [2019-10-15 01:34:14,230 INFO L226 Difference]: Without dead ends: 78 [2019-10-15 01:34:14,232 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 82 SyntacticMatches, 20 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:34:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-15 01:34:14,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-10-15 01:34:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-15 01:34:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2019-10-15 01:34:14,247 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 35 [2019-10-15 01:34:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:14,248 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2019-10-15 01:34:14,248 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:34:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2019-10-15 01:34:14,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 01:34:14,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:14,250 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:14,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:14,459 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1871527157, now seen corresponding path program 3 times [2019-10-15 01:34:14,460 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:14,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848830846] [2019-10-15 01:34:14,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:14,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:14,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 01:34:14,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848830846] [2019-10-15 01:34:14,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467519776] [2019-10-15 01:34:14,649 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 01:34:14,751 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:34:14,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:34:14,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:34:14,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 01:34:14,782 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2019-10-15 01:34:14,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335184632] [2019-10-15 01:34:14,996 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:14,997 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:14,997 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:14,997 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:14,998 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:15,031 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:15,531 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:15,543 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:15,546 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:16,663 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:16,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:34:16,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674096517] [2019-10-15 01:34:16,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:34:16,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:34:16,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:34:16,667 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand 35 states. [2019-10-15 01:34:18,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:18,560 INFO L93 Difference]: Finished difference Result 191 states and 260 transitions. [2019-10-15 01:34:18,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:34:18,560 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 65 [2019-10-15 01:34:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:18,563 INFO L225 Difference]: With dead ends: 191 [2019-10-15 01:34:18,563 INFO L226 Difference]: Without dead ends: 138 [2019-10-15 01:34:18,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 131 SyntacticMatches, 44 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:34:18,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-10-15 01:34:18,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2019-10-15 01:34:18,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-15 01:34:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2019-10-15 01:34:18,610 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 65 [2019-10-15 01:34:18,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:18,610 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2019-10-15 01:34:18,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:34:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2019-10-15 01:34:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 01:34:18,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:18,618 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:18,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:18,820 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:18,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1693517173, now seen corresponding path program 4 times [2019-10-15 01:34:18,821 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:18,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185198542] [2019-10-15 01:34:18,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:18,822 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:18,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-15 01:34:19,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185198542] [2019-10-15 01:34:19,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987567811] [2019-10-15 01:34:19,280 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 01:34:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:19,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:34:19,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:34:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-15 01:34:19,460 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:34:20,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2019-10-15 01:34:20,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1009429716] [2019-10-15 01:34:20,314 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:34:20,314 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:34:20,315 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:34:20,315 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:34:20,317 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:34:20,346 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:34:20,801 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:34:20,807 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:34:20,809 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:34:23,180 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:34:23,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:34:23,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751408558] [2019-10-15 01:34:23,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:34:23,183 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:34:23,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:34:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:34:23,185 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand 59 states. [2019-10-15 01:34:27,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:34:27,303 INFO L93 Difference]: Finished difference Result 359 states and 488 transitions. [2019-10-15 01:34:27,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:34:27,304 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 125 [2019-10-15 01:34:27,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:34:27,307 INFO L225 Difference]: With dead ends: 359 [2019-10-15 01:34:27,307 INFO L226 Difference]: Without dead ends: 258 [2019-10-15 01:34:27,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 251 SyntacticMatches, 92 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9285 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:34:27,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-10-15 01:34:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 249. [2019-10-15 01:34:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-10-15 01:34:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 254 transitions. [2019-10-15 01:34:27,342 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 254 transitions. Word has length 125 [2019-10-15 01:34:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:34:27,342 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 254 transitions. [2019-10-15 01:34:27,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:34:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 254 transitions. [2019-10-15 01:34:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2019-10-15 01:34:27,347 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:34:27,347 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:34:27,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:34:27,570 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:34:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:34:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash 717367691, now seen corresponding path program 5 times [2019-10-15 01:34:27,571 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:34:27,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556136470] [2019-10-15 01:34:27,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:27,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:34:27,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:34:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:34:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5405 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2019-10-15 01:34:28,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556136470] [2019-10-15 01:34:28,809 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140732777] [2019-10-15 01:34:28,809 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