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_seq_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:35:03,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:35:03,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:35:03,385 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:35:03,386 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:35:03,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:35:03,390 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:35:03,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:35:03,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:35:03,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:35:03,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:35:03,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:35:03,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:35:03,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:35:03,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:35:03,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:35:03,414 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:35:03,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:35:03,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:35:03,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:35:03,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:35:03,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:35:03,427 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:35:03,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:35:03,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:35:03,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:35:03,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:35:03,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:35:03,454 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 01:35:03,475 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:35:03,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:35:03,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:35:03,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:35:03,480 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:35:03,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:35:03,481 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:35:03,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:35:03,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:35:03,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:35:03,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:35:03,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:35:03,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:35:03,484 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:35:03,484 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:35:03,484 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:35:03,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:35:03,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:35:03,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:35:03,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:35:03,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:35:03,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:35:03,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:35:03,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:35:03,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:35:03,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:35:03,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:35:03,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:35:03,487 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 01:35:03,821 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:35:03,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:35:03,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:35:03,839 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:35:03,840 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:35:03,841 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_seq_init_ground.i [2019-10-15 01:35:03,907 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19db96b69/c19f3563bc4146b581ebafaefd5ead43/FLAG62a20af98 [2019-10-15 01:35:04,341 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:35:04,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_seq_init_ground.i [2019-10-15 01:35:04,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19db96b69/c19f3563bc4146b581ebafaefd5ead43/FLAG62a20af98 [2019-10-15 01:35:04,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19db96b69/c19f3563bc4146b581ebafaefd5ead43 [2019-10-15 01:35:04,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:35:04,755 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:35:04,756 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:04,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:35:04,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:35:04,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ac258e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04, skipping insertion in model container [2019-10-15 01:35:04,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:04,771 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:35:04,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:35:04,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:04,957 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:35:04,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:35:04,991 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:35:04,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04 WrapperNode [2019-10-15 01:35:04,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:35:04,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:35:04,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:35:04,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:35:05,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:05,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:05,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:05,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:05,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:05,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:05,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (1/1) ... [2019-10-15 01:35:05,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:35:05,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:35:05,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:35:05,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:35:05,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (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 01:35:05,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:35:05,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:35:05,177 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:35:05,177 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:35:05,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:35:05,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:35:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:35:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:35:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:35:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:35:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:35:05,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:35:05,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:35:05,461 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:35:05,462 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 01:35:05,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:05 BoogieIcfgContainer [2019-10-15 01:35:05,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:35:05,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:35:05,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:35:05,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:35:05,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:35:04" (1/3) ... [2019-10-15 01:35:05,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6833e5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:05, skipping insertion in model container [2019-10-15 01:35:05,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:35:04" (2/3) ... [2019-10-15 01:35:05,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6833e5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:35:05, skipping insertion in model container [2019-10-15 01:35:05,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:35:05" (3/3) ... [2019-10-15 01:35:05,489 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_seq_init_ground.i [2019-10-15 01:35:05,510 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:35:05,518 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:35:05,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:35:05,553 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:35:05,553 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:35:05,553 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:35:05,553 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:35:05,553 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:35:05,553 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:35:05,554 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:35:05,554 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:35:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-10-15 01:35:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:35:05,574 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:05,575 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:05,577 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash -10208272, now seen corresponding path program 1 times [2019-10-15 01:35:05,590 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:05,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481718074] [2019-10-15 01:35:05,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,753 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 01:35:05,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481718074] [2019-10-15 01:35:05,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:35:05,756 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:35:05,756 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067950215] [2019-10-15 01:35:05,760 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:35:05,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:05,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:35:05,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:35:05,773 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2019-10-15 01:35:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:05,812 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 01:35:05,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:35:05,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:35:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:05,821 INFO L225 Difference]: With dead ends: 31 [2019-10-15 01:35:05,821 INFO L226 Difference]: Without dead ends: 16 [2019-10-15 01:35:05,825 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 01:35:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-15 01:35:05,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-15 01:35:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-15 01:35:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-10-15 01:35:05,865 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2019-10-15 01:35:05,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:05,866 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-10-15 01:35:05,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:35:05,866 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-10-15 01:35:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:35:05,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:05,867 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:05,868 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1040450566, now seen corresponding path program 1 times [2019-10-15 01:35:05,869 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:05,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384930803] [2019-10-15 01:35:05,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,870 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:05,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:05,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384930803] [2019-10-15 01:35:05,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291996388] [2019-10-15 01:35:05,948 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 01:35:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:06,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:35:06,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:06,052 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:06,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [941329234] [2019-10-15 01:35:06,129 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:06,129 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:06,145 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:06,155 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:06,156 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:06,389 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:06,772 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 01:35:06,787 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:06,794 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:07,295 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:07,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 16 [2019-10-15 01:35:07,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218543357] [2019-10-15 01:35:07,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 01:35:07,300 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:07,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 01:35:07,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:35:07,304 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 16 states. [2019-10-15 01:35:08,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:08,010 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-10-15 01:35:08,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:35:08,011 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2019-10-15 01:35:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:08,012 INFO L225 Difference]: With dead ends: 37 [2019-10-15 01:35:08,013 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 01:35:08,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:35:08,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 01:35:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2019-10-15 01:35:08,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-15 01:35:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-10-15 01:35:08,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 12 [2019-10-15 01:35:08,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:08,028 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-10-15 01:35:08,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 01:35:08,029 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-10-15 01:35:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:35:08,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:08,031 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:08,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:08,243 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:08,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:08,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1927245456, now seen corresponding path program 2 times [2019-10-15 01:35:08,244 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:08,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407699441] [2019-10-15 01:35:08,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,244 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:08,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:08,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407699441] [2019-10-15 01:35:08,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383126139] [2019-10-15 01:35:08,358 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 01:35:08,410 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:35:08,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:08,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:35:08,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:08,422 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:08,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885417349] [2019-10-15 01:35:08,488 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:08,489 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:08,489 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:08,489 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:08,490 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:08,525 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:08,698 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 01:35:08,710 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:08,730 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:09,134 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:09,135 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 22 [2019-10-15 01:35:09,135 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880003013] [2019-10-15 01:35:09,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:35:09,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:35:09,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2019-10-15 01:35:09,139 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 22 states. [2019-10-15 01:35:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:09,958 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2019-10-15 01:35:09,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:35:09,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 15 [2019-10-15 01:35:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:09,959 INFO L225 Difference]: With dead ends: 43 [2019-10-15 01:35:09,959 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:35:09,961 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 01:35:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:35:09,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-10-15 01:35:09,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 01:35:09,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-10-15 01:35:09,968 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 15 [2019-10-15 01:35:09,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:09,968 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-10-15 01:35:09,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:35:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-10-15 01:35:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:35:09,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:09,969 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:10,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:10,174 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:10,174 INFO L82 PathProgramCache]: Analyzing trace with hash 417360304, now seen corresponding path program 3 times [2019-10-15 01:35:10,175 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:10,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903086750] [2019-10-15 01:35:10,176 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:10,176 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:10,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:10,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903086750] [2019-10-15 01:35:10,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281340506] [2019-10-15 01:35:10,322 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 01:35:10,389 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:35:10,390 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:10,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:35:10,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:10,399 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:10,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1499396664] [2019-10-15 01:35:10,611 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:10,612 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:10,612 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:10,612 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:10,613 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:10,667 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:10,838 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 01:35:10,866 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:10,873 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:11,351 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:11,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 34 [2019-10-15 01:35:11,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171598275] [2019-10-15 01:35:11,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 01:35:11,353 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:11,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 01:35:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:35:11,354 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 34 states. [2019-10-15 01:35:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:12,866 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2019-10-15 01:35:12,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:35:12,866 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 21 [2019-10-15 01:35:12,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:12,867 INFO L225 Difference]: With dead ends: 55 [2019-10-15 01:35:12,868 INFO L226 Difference]: Without dead ends: 46 [2019-10-15 01:35:12,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=953, Invalid=2953, Unknown=0, NotChecked=0, Total=3906 [2019-10-15 01:35:12,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-15 01:35:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2019-10-15 01:35:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-15 01:35:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-15 01:35:12,879 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 21 [2019-10-15 01:35:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:12,879 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-15 01:35:12,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 01:35:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-15 01:35:12,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:35:12,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:12,881 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:13,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:13,093 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:13,093 INFO L82 PathProgramCache]: Analyzing trace with hash 678070832, now seen corresponding path program 4 times [2019-10-15 01:35:13,093 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:13,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995544845] [2019-10-15 01:35:13,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:13,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:13,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995544845] [2019-10-15 01:35:13,436 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835207293] [2019-10-15 01:35:13,436 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 01:35:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:13,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:35:13,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:13,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:14,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032852740] [2019-10-15 01:35:14,147 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:14,148 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:14,148 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:14,149 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:14,149 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:14,172 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:14,283 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 01:35:14,291 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:14,295 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:14,776 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:14,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 58 [2019-10-15 01:35:14,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529892284] [2019-10-15 01:35:14,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-10-15 01:35:14,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:14,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-10-15 01:35:14,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=2149, Unknown=0, NotChecked=0, Total=3306 [2019-10-15 01:35:14,781 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 58 states. [2019-10-15 01:35:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:18,131 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2019-10-15 01:35:18,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:35:18,131 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 33 [2019-10-15 01:35:18,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:18,133 INFO L225 Difference]: With dead ends: 79 [2019-10-15 01:35:18,133 INFO L226 Difference]: Without dead ends: 70 [2019-10-15 01:35:18,137 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3557, Invalid=8653, Unknown=0, NotChecked=0, Total=12210 [2019-10-15 01:35:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-15 01:35:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2019-10-15 01:35:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:35:18,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2019-10-15 01:35:18,149 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 33 [2019-10-15 01:35:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:18,149 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2019-10-15 01:35:18,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-10-15 01:35:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2019-10-15 01:35:18,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:35:18,151 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:18,151 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:18,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:18,355 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:18,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:18,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1902605520, now seen corresponding path program 5 times [2019-10-15 01:35:18,357 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:18,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719276727] [2019-10-15 01:35:18,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:18,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:18,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:35:19,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:19,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719276727] [2019-10-15 01:35:19,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086959871] [2019-10-15 01:35:19,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:34,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-15 01:35:34,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:35:34,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 01:35:34,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:35:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:34,270 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:35:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:35:36,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2051956004] [2019-10-15 01:35:36,805 INFO L162 IcfgInterpreter]: Started Sifa with 12 locations of interest [2019-10-15 01:35:36,806 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:35:36,806 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:35:36,806 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:35:36,807 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:35:36,825 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:35:36,919 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 30 for LOIs [2019-10-15 01:35:36,925 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:35:36,928 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:35:37,622 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:35:37,622 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 10] total 106 [2019-10-15 01:35:37,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433544030] [2019-10-15 01:35:37,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 106 states [2019-10-15 01:35:37,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:35:37,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2019-10-15 01:35:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4589, Invalid=6541, Unknown=0, NotChecked=0, Total=11130 [2019-10-15 01:35:37,629 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 106 states. [2019-10-15 01:35:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:35:46,223 INFO L93 Difference]: Finished difference Result 127 states and 176 transitions. [2019-10-15 01:35:46,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2019-10-15 01:35:46,224 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 57 [2019-10-15 01:35:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:35:46,227 INFO L225 Difference]: With dead ends: 127 [2019-10-15 01:35:46,227 INFO L226 Difference]: Without dead ends: 118 [2019-10-15 01:35:46,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8102 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=13949, Invalid=28693, Unknown=0, NotChecked=0, Total=42642 [2019-10-15 01:35:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-10-15 01:35:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2019-10-15 01:35:46,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-15 01:35:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2019-10-15 01:35:46,251 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 57 [2019-10-15 01:35:46,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:35:46,252 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2019-10-15 01:35:46,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 106 states. [2019-10-15 01:35:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2019-10-15 01:35:46,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 01:35:46,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:35:46,255 INFO L380 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:35:46,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:35:46,457 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:35:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:35:46,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1763996368, now seen corresponding path program 6 times [2019-10-15 01:35:46,459 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:35:46,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001959219] [2019-10-15 01:35:46,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,460 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:35:46,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:35:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat