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_copyInit_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:20,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:20,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:20,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:20,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:20,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:20,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:20,154 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:20,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:20,160 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:20,161 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:20,162 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:20,163 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:20,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:20,165 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:20,166 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:20,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:20,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:20,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:20,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:20,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:20,178 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:20,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:20,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:20,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:20,199 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:20,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:20,201 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:20,201 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 01:33:20,215 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:20,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:20,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:20,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:20,217 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:20,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:20,219 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:20,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:20,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:20,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:20,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:20,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:20,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:20,221 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:20,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:20,222 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:20,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:20,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:20,223 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:20,223 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:20,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:20,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:20,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:20,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:20,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:20,225 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:20,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:20,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:20,225 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 01:33:20,524 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:20,540 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:20,543 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:20,544 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:20,545 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:20,546 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-10-15 01:33:20,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6dc0fc0/37ff2aa9765c461c8175c0e4f537ac29/FLAG48513af43 [2019-10-15 01:33:21,122 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:21,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInit_ground.i [2019-10-15 01:33:21,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6dc0fc0/37ff2aa9765c461c8175c0e4f537ac29/FLAG48513af43 [2019-10-15 01:33:21,473 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6dc0fc0/37ff2aa9765c461c8175c0e4f537ac29 [2019-10-15 01:33:21,484 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:21,486 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:21,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:21,487 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:21,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:21,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,495 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c250629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21, skipping insertion in model container [2019-10-15 01:33:21,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,504 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:21,521 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:21,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:21,721 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:21,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:21,761 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:21,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21 WrapperNode [2019-10-15 01:33:21,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:21,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:21,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:21,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:21,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (1/1) ... [2019-10-15 01:33:21,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:21,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:21,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:21,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:21,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (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 01:33:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:21,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:21,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:21,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:21,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:22,259 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:22,259 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:33:22,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:22 BoogieIcfgContainer [2019-10-15 01:33:22,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:22,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:22,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:22,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:22,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:21" (1/3) ... [2019-10-15 01:33:22,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e200b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:22, skipping insertion in model container [2019-10-15 01:33:22,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:21" (2/3) ... [2019-10-15 01:33:22,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e200b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:22, skipping insertion in model container [2019-10-15 01:33:22,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:22" (3/3) ... [2019-10-15 01:33:22,270 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInit_ground.i [2019-10-15 01:33:22,282 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:22,294 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:22,319 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:22,355 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:22,356 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:22,356 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:22,356 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:22,356 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:22,356 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:22,356 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:22,356 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 01:33:22,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:33:22,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:22,377 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:22,379 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:22,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:22,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1632961120, now seen corresponding path program 1 times [2019-10-15 01:33:22,392 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:22,393 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665750560] [2019-10-15 01:33:22,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:22,393 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:22,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:22,556 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 01:33:22,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665750560] [2019-10-15 01:33:22,558 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:22,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:22,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49894624] [2019-10-15 01:33:22,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:22,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:22,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:22,578 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-15 01:33:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:22,640 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-10-15 01:33:22,640 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:22,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 01:33:22,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:22,651 INFO L225 Difference]: With dead ends: 34 [2019-10-15 01:33:22,652 INFO L226 Difference]: Without dead ends: 18 [2019-10-15 01:33:22,655 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 01:33:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-15 01:33:22,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-15 01:33:22,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-15 01:33:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-15 01:33:22,694 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-10-15 01:33:22,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:22,695 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-15 01:33:22,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-15 01:33:22,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:33:22,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:22,697 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:22,697 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:22,698 INFO L82 PathProgramCache]: Analyzing trace with hash -924804708, now seen corresponding path program 1 times [2019-10-15 01:33:22,698 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:22,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880422377] [2019-10-15 01:33:22,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:22,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:22,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:22,777 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 01:33:22,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880422377] [2019-10-15 01:33:22,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79236830] [2019-10-15 01:33:22,778 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 01:33:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:22,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:22,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:22,894 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 01:33:22,894 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:22,938 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 01:33:22,939 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [539371590] [2019-10-15 01:33:22,965 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:22,965 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:22,973 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:22,983 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:22,983 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:23,154 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:23,869 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:23,886 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:23,893 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:24,420 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:24,421 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-10-15 01:33:24,421 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387171594] [2019-10-15 01:33:24,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:24,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:24,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:24,427 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-10-15 01:33:25,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:25,187 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-10-15 01:33:25,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:25,188 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 01:33:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:25,190 INFO L225 Difference]: With dead ends: 44 [2019-10-15 01:33:25,190 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 01:33:25,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:25,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 01:33:25,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2019-10-15 01:33:25,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 01:33:25,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 01:33:25,204 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-15 01:33:25,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:25,208 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 01:33:25,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 01:33:25,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 01:33:25,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:25,210 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:25,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:25,422 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:25,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1819409760, now seen corresponding path program 2 times [2019-10-15 01:33:25,423 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:25,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039627637] [2019-10-15 01:33:25,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:25,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:33:25,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039627637] [2019-10-15 01:33:25,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668223180] [2019-10-15 01:33:25,555 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 01:33:25,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:25,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:25,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:25,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:33:25,654 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-15 01:33:25,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428308581] [2019-10-15 01:33:25,719 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:25,719 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:25,720 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:25,720 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:25,720 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:25,761 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:26,189 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:26,210 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:26,227 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:26,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:26,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-10-15 01:33:26,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133556464] [2019-10-15 01:33:26,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:26,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:26,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:26,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:26,764 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 23 states. [2019-10-15 01:33:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:27,872 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2019-10-15 01:33:27,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:27,873 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-10-15 01:33:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:27,874 INFO L225 Difference]: With dead ends: 59 [2019-10-15 01:33:27,875 INFO L226 Difference]: Without dead ends: 45 [2019-10-15 01:33:27,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:27,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-15 01:33:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2019-10-15 01:33:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 01:33:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-10-15 01:33:27,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2019-10-15 01:33:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:27,886 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-10-15 01:33:27,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-10-15 01:33:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:33:27,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:27,888 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:28,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:28,092 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash 708262432, now seen corresponding path program 3 times [2019-10-15 01:33:28,094 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:28,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640981411] [2019-10-15 01:33:28,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:28,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:28,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:28,245 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:33:28,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640981411] [2019-10-15 01:33:28,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407849371] [2019-10-15 01:33:28,246 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 01:33:28,322 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:28,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:28,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:28,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:28,342 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:33:28,342 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-15 01:33:28,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136485558] [2019-10-15 01:33:28,555 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:28,555 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:28,556 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:28,556 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:28,556 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:28,624 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:28,917 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:28,925 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:28,929 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:29,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:29,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-10-15 01:33:29,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915634007] [2019-10-15 01:33:29,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:29,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:29,620 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 35 states. [2019-10-15 01:33:31,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:31,677 INFO L93 Difference]: Finished difference Result 89 states and 116 transitions. [2019-10-15 01:33:31,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:31,683 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-10-15 01:33:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:31,684 INFO L225 Difference]: With dead ends: 89 [2019-10-15 01:33:31,684 INFO L226 Difference]: Without dead ends: 69 [2019-10-15 01:33:31,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-15 01:33:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-10-15 01:33:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:33:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-10-15 01:33:31,699 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-10-15 01:33:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:31,700 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-10-15 01:33:31,700 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-10-15 01:33:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:33:31,701 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:31,702 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:31,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:31,913 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:31,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1847424736, now seen corresponding path program 4 times [2019-10-15 01:33:31,914 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:31,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39640690] [2019-10-15 01:33:31,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,914 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:33:32,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39640690] [2019-10-15 01:33:32,349 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034166452] [2019-10-15 01:33:32,349 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 01:33:32,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:32,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:33:32,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:33:32,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-10-15 01:33:33,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81905816] [2019-10-15 01:33:33,153 INFO L162 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-10-15 01:33:33,153 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:33,154 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:33,154 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:33,154 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:33,178 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:33,457 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-10-15 01:33:33,466 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:33,470 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:34,697 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:34,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-10-15 01:33:34,697 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336697778] [2019-10-15 01:33:34,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:33:34,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:34,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:33:34,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:33:34,702 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 59 states. [2019-10-15 01:33:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:39,000 INFO L93 Difference]: Finished difference Result 149 states and 200 transitions. [2019-10-15 01:33:39,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:39,000 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-10-15 01:33:39,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:39,002 INFO L225 Difference]: With dead ends: 149 [2019-10-15 01:33:39,003 INFO L226 Difference]: Without dead ends: 117 [2019-10-15 01:33:39,006 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 113 SyntacticMatches, 23 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:39,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-15 01:33:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 108. [2019-10-15 01:33:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-15 01:33:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-10-15 01:33:39,024 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2019-10-15 01:33:39,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:39,025 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-10-15 01:33:39,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-10-15 01:33:39,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 01:33:39,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:39,029 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:39,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:39,233 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1342396640, now seen corresponding path program 5 times [2019-10-15 01:33:39,234 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:39,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198631755] [2019-10-15 01:33:39,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:39,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:39,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-10-15 01:33:40,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198631755] [2019-10-15 01:33:40,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435558623] [2019-10-15 01:33:40,252 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