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/sep20-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:25:18,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:25:18,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:25:18,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:25:18,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:25:18,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:25:18,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:25:18,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:25:18,959 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:25:18,960 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:25:18,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:25:18,967 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:25:18,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:25:18,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:25:18,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:25:18,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:25:18,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:25:18,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:25:18,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:25:18,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:25:18,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:25:18,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:25:18,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:25:18,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:25:18,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:25:19,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:25:19,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:25:19,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:25:19,017 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 03:25:19,038 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:25:19,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:25:19,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:25:19,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:25:19,044 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:25:19,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:25:19,045 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:25:19,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:25:19,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:25:19,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:25:19,047 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:25:19,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:25:19,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:25:19,048 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:25:19,048 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:25:19,048 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:25:19,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:25:19,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:25:19,049 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:25:19,049 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:25:19,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:25:19,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:19,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:25:19,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:25:19,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:25:19,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:25:19,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:25:19,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:25:19,052 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 03:25:19,390 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:25:19,413 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:25:19,418 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:25:19,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:25:19,420 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:25:19,421 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-10-15 03:25:19,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56cd2bd6/db20620c4ee7453bb2fc281f4270e3df/FLAGec9694b44 [2019-10-15 03:25:19,960 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:25:19,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep20-1.i [2019-10-15 03:25:19,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56cd2bd6/db20620c4ee7453bb2fc281f4270e3df/FLAGec9694b44 [2019-10-15 03:25:20,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e56cd2bd6/db20620c4ee7453bb2fc281f4270e3df [2019-10-15 03:25:20,372 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:25:20,373 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:25:20,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:20,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:25:20,378 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:25:20,379 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,382 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b35c066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20, skipping insertion in model container [2019-10-15 03:25:20,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,390 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:25:20,411 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:25:20,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:20,605 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:25:20,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:20,724 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:25:20,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20 WrapperNode [2019-10-15 03:25:20,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:20,725 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:25:20,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:25:20,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:25:20,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (1/1) ... [2019-10-15 03:25:20,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:25:20,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:25:20,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:25:20,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:25:20,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (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 03:25:20,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:25:20,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:25:20,831 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-15 03:25:20,831 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:25:20,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:25:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:25:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-15 03:25:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:25:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:25:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:25:20,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:25:20,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:25:20,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:25:20,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:25:21,263 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:25:21,263 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:25:21,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:21 BoogieIcfgContainer [2019-10-15 03:25:21,265 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:25:21,266 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:25:21,266 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:25:21,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:25:21,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:25:20" (1/3) ... [2019-10-15 03:25:21,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145407c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:21, skipping insertion in model container [2019-10-15 03:25:21,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:20" (2/3) ... [2019-10-15 03:25:21,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145407c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:21, skipping insertion in model container [2019-10-15 03:25:21,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:21" (3/3) ... [2019-10-15 03:25:21,273 INFO L109 eAbstractionObserver]: Analyzing ICFG sep20-1.i [2019-10-15 03:25:21,281 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:25:21,288 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:25:21,299 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:25:21,325 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:25:21,326 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:25:21,326 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:25:21,326 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:25:21,327 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:25:21,327 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:25:21,327 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:25:21,328 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:25:21,346 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:25:21,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:25:21,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:21,353 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 03:25:21,355 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:21,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-10-15 03:25:21,367 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:21,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42327560] [2019-10-15 03:25:21,368 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,553 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 03:25:21,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42327560] [2019-10-15 03:25:21,555 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:21,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:21,556 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442775099] [2019-10-15 03:25:21,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:21,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:21,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:21,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:21,582 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:25:21,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:21,635 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:25:21,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:21,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:25:21,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:21,652 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:25:21,653 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:25:21,661 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 03:25:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:25:21,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:25:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:25:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:25:21,734 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:25:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:21,735 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:25:21,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:25:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:25:21,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:21,741 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 03:25:21,741 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:21,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:21,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-10-15 03:25:21,744 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:21,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447559372] [2019-10-15 03:25:21,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,908 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 03:25:21,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447559372] [2019-10-15 03:25:21,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658371518] [2019-10-15 03:25:21,911 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 03:25:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:22,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:25:22,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:22,066 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 03:25:22,067 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:22,112 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 03:25:22,113 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:25:22,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:25:22,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412991374] [2019-10-15 03:25:22,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:22,116 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:22,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:22,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:22,117 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:25:22,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:22,135 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:25:22,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:22,136 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:25:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:22,137 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:25:22,138 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:25:22,139 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 03:25:22,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:25:22,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:25:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:25:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:25:22,145 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:25:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:22,146 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:25:22,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:25:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:25:22,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:22,148 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 03:25:22,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:22,354 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:22,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:22,355 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-10-15 03:25:22,355 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:22,356 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077425193] [2019-10-15 03:25:22,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:22,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:22,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:22,516 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 03:25:22,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077425193] [2019-10-15 03:25:22,517 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:22,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:22,518 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269660394] [2019-10-15 03:25:22,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:22,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:22,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:22,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:22,520 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:22,538 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:22,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:22,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:22,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:22,539 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:22,539 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:22,540 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 03:25:22,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:22,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:22,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:22,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:22,546 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:22,548 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:22,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:22,549 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:22,550 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 03:25:22,550 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:22,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:22,550 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-10-15 03:25:22,551 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:22,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656116776] [2019-10-15 03:25:22,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:22,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:22,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:22,647 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 03:25:22,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656116776] [2019-10-15 03:25:22,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131491194] [2019-10-15 03:25:22,649 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 03:25:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:22,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:22,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:22,788 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 03:25:22,789 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:22,832 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 03:25:22,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337124403] [2019-10-15 03:25:22,880 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:22,881 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:22,886 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:22,894 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:22,895 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:23,046 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:25,144 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:25,225 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:25,229 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:25,641 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:25,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:25,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105111595] [2019-10-15 03:25:25,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:25,645 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:25,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:25,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:25,648 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:26,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:26,420 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:26,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:26,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:26,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:26,421 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:26,421 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:26,422 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:26,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:26,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:26,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:26,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:26,430 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:26,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:26,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:26,432 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 03:25:26,635 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:26,636 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-10-15 03:25:26,637 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:26,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898678704] [2019-10-15 03:25:26,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:26,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:26,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:26,739 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 03:25:26,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898678704] [2019-10-15 03:25:26,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306558347] [2019-10-15 03:25:26,739 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 03:25:26,831 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:26,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:26,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:26,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:26,858 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 03:25:26,858 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:26,903 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 03:25:26,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1449139708] [2019-10-15 03:25:26,906 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:26,906 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:26,907 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:26,907 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:26,907 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:26,933 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:28,559 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:28,606 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:28,611 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:29,043 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:29,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 03:25:29,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636232709] [2019-10-15 03:25:29,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:29,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:29,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:29,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:29,047 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 03:25:30,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:30,153 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:25:30,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:25:30,154 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:25:30,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:30,155 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:25:30,156 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:25:30,157 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:25:30,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:25:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 03:25:30,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:25:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:25:30,165 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 03:25:30,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:30,165 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:25:30,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:25:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:25:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:25:30,167 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:30,167 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 03:25:30,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:30,373 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1603069542, now seen corresponding path program 3 times [2019-10-15 03:25:30,373 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:30,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495930466] [2019-10-15 03:25:30,374 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:30,374 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:30,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:30,509 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 03:25:30,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495930466] [2019-10-15 03:25:30,510 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033293648] [2019-10-15 03:25:30,510 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 03:25:30,651 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:30,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:30,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:25:30,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:30,670 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 03:25:30,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:30,768 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 03:25:30,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [180517712] [2019-10-15 03:25:30,771 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:30,771 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:30,773 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:30,773 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:30,773 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:30,795 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:32,412 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:32,463 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:32,466 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:32,949 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:32,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 03:25:32,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247581589] [2019-10-15 03:25:32,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 03:25:32,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:32,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 03:25:32,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:25:32,955 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 03:25:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:33,913 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 03:25:33,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:25:33,913 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 03:25:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:33,915 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:25:33,915 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:25:33,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 03:25:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:25:33,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 03:25:33,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:25:33,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 03:25:33,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 03:25:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:33,928 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 03:25:33,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 03:25:33,929 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 03:25:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 03:25:33,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:33,930 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 03:25:34,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:34,136 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:34,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:34,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1700782945, now seen corresponding path program 4 times [2019-10-15 03:25:34,137 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:34,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160817465] [2019-10-15 03:25:34,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:34,138 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:34,138 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:34,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:34,358 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 03:25:34,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160817465] [2019-10-15 03:25:34,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015279583] [2019-10-15 03:25:34,359 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 03:25:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:34,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:25:34,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:34,569 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 03:25:34,569 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:34,797 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 03:25:34,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [690016730] [2019-10-15 03:25:34,799 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:34,799 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:34,800 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:34,800 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:34,800 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:34,831 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:36,440 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:36,477 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:36,480 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:36,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:36,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 33 [2019-10-15 03:25:36,926 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742872264] [2019-10-15 03:25:36,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 03:25:36,928 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:36,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 03:25:36,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=840, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:25:36,929 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 34 states. [2019-10-15 03:25:38,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:38,340 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2019-10-15 03:25:38,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 03:25:38,341 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 49 [2019-10-15 03:25:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:38,343 INFO L225 Difference]: With dead ends: 62 [2019-10-15 03:25:38,343 INFO L226 Difference]: Without dead ends: 44 [2019-10-15 03:25:38,345 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 126 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=797, Invalid=2985, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 03:25:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-15 03:25:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-15 03:25:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-15 03:25:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-10-15 03:25:38,354 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 49 [2019-10-15 03:25:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:38,354 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-10-15 03:25:38,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 03:25:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-10-15 03:25:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 03:25:38,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:38,357 INFO L380 BasicCegarLoop]: trace histogram [20, 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 03:25:38,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:38,562 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:38,562 INFO L82 PathProgramCache]: Analyzing trace with hash 582890977, now seen corresponding path program 5 times [2019-10-15 03:25:38,562 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:38,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855936218] [2019-10-15 03:25:38,563 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:38,563 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:38,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-15 03:25:38,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855936218] [2019-10-15 03:25:38,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538728265] [2019-10-15 03:25:38,779 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 03:25:38,961 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:25:38,962 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:38,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:25:38,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:38,983 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-15 03:25:38,983 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:39,052 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-15 03:25:39,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1569313738] [2019-10-15 03:25:39,054 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:39,055 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:39,056 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:39,056 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:39,056 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:39,078 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:40,556 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:40,596 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:40,599 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:40,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:40,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 03:25:40,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193107680] [2019-10-15 03:25:40,944 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:25:40,944 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:40,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:25:40,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:25:40,945 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 24 states. [2019-10-15 03:25:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:42,077 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2019-10-15 03:25:42,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 03:25:42,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 57 [2019-10-15 03:25:42,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:42,078 INFO L225 Difference]: With dead ends: 67 [2019-10-15 03:25:42,079 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 03:25:42,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 03:25:42,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 03:25:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 03:25:42,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 03:25:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 03:25:42,088 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 57 [2019-10-15 03:25:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:42,089 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 03:25:42,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 03:25:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 03:25:42,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-15 03:25:42,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:42,090 INFO L380 BasicCegarLoop]: trace histogram [30, 20, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:42,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:42,295 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:42,296 INFO L82 PathProgramCache]: Analyzing trace with hash -971041183, now seen corresponding path program 6 times [2019-10-15 03:25:42,296 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:42,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531422455] [2019-10-15 03:25:42,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:42,297 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:42,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2019-10-15 03:25:42,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531422455] [2019-10-15 03:25:42,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112635980] [2019-10-15 03:25:42,526 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 03:25:42,816 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:42,816 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:42,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:25:42,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 244 proven. 55 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2019-10-15 03:25:42,855 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2019-10-15 03:25:43,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946699497] [2019-10-15 03:25:43,081 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:43,082 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:43,082 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:43,082 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:43,083 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:43,097 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:44,541 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:44,574 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:44,577 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:45,105 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:45,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 33 [2019-10-15 03:25:45,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327146362] [2019-10-15 03:25:45,108 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 03:25:45,108 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:45,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 03:25:45,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 03:25:45,115 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 34 states. [2019-10-15 03:25:46,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:46,851 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2019-10-15 03:25:46,851 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-15 03:25:46,851 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 75 [2019-10-15 03:25:46,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:46,853 INFO L225 Difference]: With dead ends: 83 [2019-10-15 03:25:46,853 INFO L226 Difference]: Without dead ends: 60 [2019-10-15 03:25:46,854 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 203 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=918, Invalid=2864, Unknown=0, NotChecked=0, Total=3782 [2019-10-15 03:25:46,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-15 03:25:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2019-10-15 03:25:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 03:25:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2019-10-15 03:25:46,864 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 75 [2019-10-15 03:25:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:46,864 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2019-10-15 03:25:46,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 03:25:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2019-10-15 03:25:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-15 03:25:46,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:46,866 INFO L380 BasicCegarLoop]: trace histogram [60, 20, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:47,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:47,073 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1274945055, now seen corresponding path program 7 times [2019-10-15 03:25:47,074 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:47,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970297570] [2019-10-15 03:25:47,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2019-10-15 03:25:47,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970297570] [2019-10-15 03:25:47,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623352652] [2019-10-15 03:25:47,326 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 03:25:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:47,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:47,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 886 proven. 1 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2019-10-15 03:25:47,692 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2170 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2019-10-15 03:25:47,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137586339] [2019-10-15 03:25:47,725 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:47,725 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:47,725 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:47,726 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:47,726 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:47,743 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:49,158 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:49,186 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:49,189 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:49,489 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:49,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:49,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363714499] [2019-10-15 03:25:49,491 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:49,491 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:49,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:49,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:49,492 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 18 states. [2019-10-15 03:25:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:50,163 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2019-10-15 03:25:50,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:50,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 105 [2019-10-15 03:25:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:50,165 INFO L225 Difference]: With dead ends: 91 [2019-10-15 03:25:50,165 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 03:25:50,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:50,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 03:25:50,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-10-15 03:25:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-15 03:25:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-10-15 03:25:50,176 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 105 [2019-10-15 03:25:50,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:50,177 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-10-15 03:25:50,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:50,177 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-10-15 03:25:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 03:25:50,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:50,179 INFO L380 BasicCegarLoop]: trace histogram [60, 20, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:50,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:50,386 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:50,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:50,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1410112048, now seen corresponding path program 8 times [2019-10-15 03:25:50,387 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:50,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541075489] [2019-10-15 03:25:50,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:50,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2019-10-15 03:25:50,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541075489] [2019-10-15 03:25:50,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585218537] [2019-10-15 03:25:50,964 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:51,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 03:25:51,291 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:51,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:25:51,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 886 proven. 10 refuted. 0 times theorem prover too weak. 1283 trivial. 0 not checked. [2019-10-15 03:25:51,311 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2179 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2169 trivial. 0 not checked. [2019-10-15 03:25:51,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1923142091] [2019-10-15 03:25:51,387 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:51,388 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:51,388 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:51,388 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:51,389 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:51,405 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:52,643 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:52,685 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:52,688 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:53,038 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:53,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 03:25:53,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207277650] [2019-10-15 03:25:53,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:25:53,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:53,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:25:53,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:25:53,042 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 24 states.