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/reducercommutativity/sep60-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:25:32,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:25:32,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:25:32,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:25:32,904 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:25:32,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:25:32,908 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:25:32,917 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:25:32,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:25:32,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:25:32,926 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:25:32,927 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:25:32,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:25:32,929 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:25:32,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:25:32,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:25:32,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:25:32,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:25:32,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:25:32,936 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:25:32,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:25:32,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:25:32,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:25:32,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:25:32,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:25:32,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:25:32,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:25:32,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:25:32,951 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:25:32,978 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:25:32,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:25:32,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:25:32,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:25:32,980 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:25:32,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:25:32,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:25:32,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:25:32,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:25:32,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:25:32,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:25:32,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:25:32,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:25:32,982 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:25:32,983 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:25:32,983 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:25:32,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:25:32,984 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:25:32,984 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:25:32,984 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:25:32,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:25:32,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:32,985 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:25:32,985 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:25:32,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:25:32,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:25:32,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:25:32,986 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:25:32,986 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:25:33,280 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:25:33,293 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:25:33,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:25:33,297 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:25:33,298 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:25:33,298 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-10-15 03:25:33,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bacd376fb/61b7b202de544df6ac91195c399dc942/FLAGb3f927f50 [2019-10-15 03:25:33,781 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:25:33,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep60-2.i [2019-10-15 03:25:33,788 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bacd376fb/61b7b202de544df6ac91195c399dc942/FLAGb3f927f50 [2019-10-15 03:25:34,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bacd376fb/61b7b202de544df6ac91195c399dc942 [2019-10-15 03:25:34,179 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:25:34,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:25:34,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:34,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:25:34,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:25:34,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0f51fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34, skipping insertion in model container [2019-10-15 03:25:34,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,197 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:25:34,214 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:25:34,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:34,408 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:25:34,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:34,519 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:25:34,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34 WrapperNode [2019-10-15 03:25:34,520 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:34,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:25:34,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:25:34,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:25:34,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,554 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,569 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,570 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... [2019-10-15 03:25:34,573 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:25:34,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:25:34,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:25:34,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:25:34,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:34,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:25:34,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:25:34,633 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-15 03:25:34,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:25:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:25:34,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:25:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-15 03:25:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:25:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:25:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:25:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:25:34,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:25:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:25:34,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:25:35,043 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:25:35,043 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:25:35,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:35 BoogieIcfgContainer [2019-10-15 03:25:35,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:25:35,046 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:25:35,046 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:25:35,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:25:35,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:25:34" (1/3) ... [2019-10-15 03:25:35,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f99e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:35, skipping insertion in model container [2019-10-15 03:25:35,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:34" (2/3) ... [2019-10-15 03:25:35,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f99e64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:35, skipping insertion in model container [2019-10-15 03:25:35,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:35" (3/3) ... [2019-10-15 03:25:35,052 INFO L109 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2019-10-15 03:25:35,061 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:25:35,069 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:25:35,080 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:25:35,103 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:25:35,103 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:25:35,103 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:25:35,103 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:25:35,103 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:25:35,103 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:25:35,104 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:25:35,104 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:25:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:25:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:25:35,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:35,124 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:35,125 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:35,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-10-15 03:25:35,136 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:35,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627555699] [2019-10-15 03:25:35,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:35,137 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:35,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:35,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 03:25:35,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627555699] [2019-10-15 03:25:35,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:35,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:35,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287813401] [2019-10-15 03:25:35,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:35,339 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:35,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:35,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:35,359 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:25:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:35,405 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:25:35,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:35,407 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:25:35,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:35,418 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:25:35,419 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:25:35,424 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 03:25:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:25:35,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:25:35,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:25:35,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:25:35,481 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:25:35,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:35,483 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:25:35,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:35,483 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:25:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:25:35,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:35,488 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:35,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:35,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-10-15 03:25:35,490 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:35,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034581441] [2019-10-15 03:25:35,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:35,491 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:35,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:35,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:25:35,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034581441] [2019-10-15 03:25:35,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636488037] [2019-10-15 03:25:35,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:35,689 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:25:35,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:25:35,727 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 03:25:35,768 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:25:35,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:25:35,769 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328207615] [2019-10-15 03:25:35,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:35,771 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:35,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:35,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:35,772 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:25:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:35,783 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:25:35,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:35,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:25:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:35,785 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:25:35,785 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:25:35,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:25:35,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:25:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:25:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:25:35,792 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:25:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:35,792 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:25:35,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:25:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:25:35,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:35,794 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:35,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:36,000 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:36,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-10-15 03:25:36,001 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:36,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774206454] [2019-10-15 03:25:36,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:36,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:36,003 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:36,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774206454] [2019-10-15 03:25:36,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:36,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:36,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409973932] [2019-10-15 03:25:36,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:36,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:36,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:36,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:36,119 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:36,134 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:36,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:36,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:36,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:36,136 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:36,136 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:36,137 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 03:25:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:36,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:36,147 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:36,149 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:36,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:36,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:36,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:36,150 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:36,151 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:36,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:36,151 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-10-15 03:25:36,152 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:36,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738793620] [2019-10-15 03:25:36,152 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:36,152 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:36,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:36,252 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:36,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738793620] [2019-10-15 03:25:36,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033272203] [2019-10-15 03:25:36,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:36,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:36,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:36,344 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:36,344 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:36,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962299466] [2019-10-15 03:25:36,408 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:36,409 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:36,414 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:36,420 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:36,421 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:36,540 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:38,696 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:38,759 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:38,763 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:39,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:39,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:39,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149168227] [2019-10-15 03:25:39,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:39,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:39,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:39,138 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:39,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:39,761 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:39,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:39,762 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:39,763 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:39,763 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:39,764 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:39,770 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:39,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:39,771 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:39,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:39,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:39,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:39,772 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:39,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:39,983 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:39,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:39,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-10-15 03:25:39,984 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:39,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867313617] [2019-10-15 03:25:39,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:39,984 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:39,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:25:40,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867313617] [2019-10-15 03:25:40,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298148189] [2019-10-15 03:25:40,081 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:40,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:40,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:40,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:40,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:40,182 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:40,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2013526773] [2019-10-15 03:25:40,217 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:40,217 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:40,218 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:40,218 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:40,218 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:40,241 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:41,749 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:41,787 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:41,791 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:42,180 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:42,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 03:25:42,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098216862] [2019-10-15 03:25:42,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:42,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:42,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:42,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:42,186 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 03:25:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:43,051 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:25:43,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:25:43,051 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:25:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:43,052 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:25:43,053 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:25:43,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:25:43,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:25:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 03:25:43,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:25:43,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:25:43,060 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 03:25:43,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:43,061 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:25:43,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:25:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:25:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:25:43,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:43,062 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:43,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:43,266 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:43,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:43,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1603069542, now seen corresponding path program 3 times [2019-10-15 03:25:43,267 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:43,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782800127] [2019-10-15 03:25:43,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:43,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:43,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:43,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:43,378 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782800127] [2019-10-15 03:25:43,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983007942] [2019-10-15 03:25:43,379 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:43,498 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:43,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:43,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:25:43,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:43,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:43,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [68812372] [2019-10-15 03:25:43,657 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:43,657 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:43,658 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:43,658 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:43,658 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:43,682 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:44,965 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:45,002 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:45,006 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:45,369 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:45,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 03:25:45,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607773680] [2019-10-15 03:25:45,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 03:25:45,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:45,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 03:25:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:25:45,372 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 03:25:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:46,244 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 03:25:46,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:25:46,244 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 03:25:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:46,246 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:25:46,246 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:25:46,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 03:25:46,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:25:46,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 03:25:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:25:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 03:25:46,255 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 03:25:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:46,256 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 03:25:46,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 03:25:46,256 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 03:25:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 03:25:46,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:46,257 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:46,461 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:46,461 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1700782945, now seen corresponding path program 4 times [2019-10-15 03:25:46,462 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:46,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372227260] [2019-10-15 03:25:46,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:46,463 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:46,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:46,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372227260] [2019-10-15 03:25:46,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842334052] [2019-10-15 03:25:46,654 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:46,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:25:46,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:46,847 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:47,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [530544296] [2019-10-15 03:25:47,116 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:47,116 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:47,116 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:47,116 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:47,117 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:47,133 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:48,751 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:48,779 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:48,782 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:49,186 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:49,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 03:25:49,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985362044] [2019-10-15 03:25:49,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 03:25:49,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:49,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 03:25:49,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 03:25:49,190 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 03:25:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:50,679 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 03:25:50,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 03:25:50,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 03:25:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:50,681 INFO L225 Difference]: With dead ends: 68 [2019-10-15 03:25:50,681 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 03:25:50,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 03:25:50,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 03:25:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 03:25:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 03:25:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 03:25:50,693 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 03:25:50,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:50,693 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 03:25:50,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 03:25:50,693 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 03:25:50,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 03:25:50,695 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:50,695 INFO L380 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:50,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:50,899 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1773432895, now seen corresponding path program 5 times [2019-10-15 03:25:50,900 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:50,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167848908] [2019-10-15 03:25:50,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,900 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:51,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167848908] [2019-10-15 03:25:51,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737126889] [2019-10-15 03:25:51,299 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:51,480 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:25:51,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:51,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:51,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-15 03:25:51,519 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:51,558 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-15 03:25:51,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773281136] [2019-10-15 03:25:51,560 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:51,560 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:51,561 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:51,561 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:51,561 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:51,576 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:52,767 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:52,813 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:52,817 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:53,467 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:53,468 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 03:25:53,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484039028] [2019-10-15 03:25:53,469 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 03:25:53,469 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:53,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 03:25:53,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 03:25:53,470 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 03:25:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:56,066 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 03:25:56,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 03:25:56,066 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 03:25:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:56,067 INFO L225 Difference]: With dead ends: 72 [2019-10-15 03:25:56,068 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 03:25:56,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 03:25:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 03:25:56,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 03:25:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 03:25:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 03:25:56,080 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 03:25:56,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:56,080 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 03:25:56,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 03:25:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 03:25:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 03:25:56,082 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:56,082 INFO L380 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:56,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:56,284 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash -806625269, now seen corresponding path program 6 times [2019-10-15 03:25:56,285 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:56,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210763107] [2019-10-15 03:25:56,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:56,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:56,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:25:56,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210763107] [2019-10-15 03:25:56,823 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422286409] [2019-10-15 03:25:56,823 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:57,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:57,049 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:57,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 03:25:57,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:25:57,079 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:25:58,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048706628] [2019-10-15 03:25:58,103 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:58,103 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:58,104 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:58,104 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:58,104 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:58,119 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:59,504 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:59,543 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:59,546 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:00,148 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:00,149 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 69 [2019-10-15 03:26:00,149 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253946774] [2019-10-15 03:26:00,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-10-15 03:26:00,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-10-15 03:26:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1740, Invalid=3090, Unknown=0, NotChecked=0, Total=4830 [2019-10-15 03:26:00,153 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 70 states. [2019-10-15 03:26:03,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:03,959 INFO L93 Difference]: Finished difference Result 104 states and 140 transitions. [2019-10-15 03:26:03,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-10-15 03:26:03,959 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 67 [2019-10-15 03:26:03,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:03,961 INFO L225 Difference]: With dead ends: 104 [2019-10-15 03:26:03,961 INFO L226 Difference]: Without dead ends: 83 [2019-10-15 03:26:03,966 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3929 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5099, Invalid=12723, Unknown=0, NotChecked=0, Total=17822 [2019-10-15 03:26:03,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-15 03:26:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-10-15 03:26:03,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-15 03:26:03,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-15 03:26:03,978 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 67 [2019-10-15 03:26:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:03,978 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-15 03:26:03,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-10-15 03:26:03,978 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-15 03:26:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-15 03:26:03,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:03,980 INFO L380 BasicCegarLoop]: trace histogram [56, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:04,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:04,195 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1712308368, now seen corresponding path program 7 times [2019-10-15 03:26:04,197 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:04,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563286740] [2019-10-15 03:26:04,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:04,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:04,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:04,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:26:05,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563286740] [2019-10-15 03:26:05,606 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62747276] [2019-10-15 03:26:05,606 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:05,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 58 conjunts are in the unsatisfiable core [2019-10-15 03:26:05,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:26:05,927 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:26:07,459 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [91934758] [2019-10-15 03:26:07,460 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:07,461 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:07,461 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:07,461 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:07,461 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:07,491 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:08,798 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:26:08,832 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:08,834 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:09,525 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:09,525 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59, 11] total 73 [2019-10-15 03:26:09,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760383316] [2019-10-15 03:26:09,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2019-10-15 03:26:09,527 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2019-10-15 03:26:09,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1982, Invalid=3420, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 03:26:09,530 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 74 states.