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/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:25:18,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:25:18,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:25:18,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:25:18,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:25:18,180 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:25:18,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:25:18,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:25:18,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:25:18,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:25:18,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:25:18,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:25:18,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:25:18,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:25:18,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:25:18,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:25:18,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:25:18,207 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:25:18,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:25:18,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:25:18,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:25:18,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:25:18,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:25:18,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:25:18,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:25:18,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:25:18,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:25:18,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:25:18,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:25:18,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:25:18,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:25:18,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:25:18,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:25:18,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:25:18,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:25:18,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:25:18,245 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 03:25:18,266 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:25:18,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:25:18,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:25:18,272 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:25:18,272 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:25:18,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:25:18,272 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:25:18,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:25:18,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:25:18,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:25:18,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:25:18,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:25:18,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:25:18,275 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:25:18,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:25:18,276 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:25:18,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:25:18,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:25:18,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:25:18,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:25:18,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:25:18,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:18,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:25:18,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:25:18,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:25:18,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:25:18,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:25:18,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:25:18,278 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 03:25:18,574 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:25:18,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:25:18,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:25:18,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:25:18,591 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:25:18,592 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-10-15 03:25:18,670 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2e5ff6c/c561a0803c2a48edb84e51b841c99ece/FLAG1d18a4901 [2019-10-15 03:25:19,151 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:25:19,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-10-15 03:25:19,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2e5ff6c/c561a0803c2a48edb84e51b841c99ece/FLAG1d18a4901 [2019-10-15 03:25:19,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f2e5ff6c/c561a0803c2a48edb84e51b841c99ece [2019-10-15 03:25:19,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:25:19,586 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:25:19,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:19,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:25:19,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:25:19,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c76a8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19, skipping insertion in model container [2019-10-15 03:25:19,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,602 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:25:19,618 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:25:19,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:19,818 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:25:19,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:19,949 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:25:19,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19 WrapperNode [2019-10-15 03:25:19,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:19,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:25:19,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:25:19,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:25:19,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (1/1) ... [2019-10-15 03:25:19,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:25:19,995 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:25:19,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:25:19,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:25:19,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (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 03:25:20,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:25:20,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:25:20,062 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-15 03:25:20,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:25:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:25:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:25:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-15 03:25:20,062 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:25:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:25:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:25:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:25:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:25:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:25:20,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:25:20,515 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:25:20,516 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:25:20,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:20 BoogieIcfgContainer [2019-10-15 03:25:20,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:25:20,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:25:20,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:25:20,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:25:20,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:25:19" (1/3) ... [2019-10-15 03:25:20,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1adaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:20, skipping insertion in model container [2019-10-15 03:25:20,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:19" (2/3) ... [2019-10-15 03:25:20,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e1adaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:20, skipping insertion in model container [2019-10-15 03:25:20,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:20" (3/3) ... [2019-10-15 03:25:20,525 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-10-15 03:25:20,535 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:25:20,543 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:25:20,554 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:25:20,577 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:25:20,577 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:25:20,577 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:25:20,578 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:25:20,578 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:25:20,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:25:20,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:25:20,578 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:25:20,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:25:20,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:25:20,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:20,600 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 03:25:20,601 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-10-15 03:25:20,613 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:20,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404213571] [2019-10-15 03:25:20,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:20,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:20,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:20,794 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 03:25:20,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404213571] [2019-10-15 03:25:20,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:20,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:20,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937206812] [2019-10-15 03:25:20,803 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:20,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:20,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:20,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:20,818 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:25:20,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:20,857 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:25:20,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:20,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:25:20,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:20,870 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:25:20,870 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:25:20,873 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 03:25:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:25:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:25:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:25:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:25:20,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:25:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:20,922 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:25:20,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:20,923 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:25:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:25:20,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:20,925 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 03:25:20,926 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:20,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-10-15 03:25:20,926 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:20,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750424981] [2019-10-15 03:25:20,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:20,927 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:20,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,006 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 03:25:21,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750424981] [2019-10-15 03:25:21,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685600585] [2019-10-15 03:25:21,007 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 03:25:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:25:21,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:21,114 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 03:25:21,115 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:21,157 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 03:25:21,158 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:25:21,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:25:21,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904413314] [2019-10-15 03:25:21,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:21,160 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:21,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:21,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:21,161 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:25:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:21,193 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:25:21,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:21,195 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:25:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:21,196 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:25:21,196 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:25:21,198 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 03:25:21,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:25:21,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:25:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:25:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:25:21,204 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:25:21,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:21,205 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:25:21,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:21,205 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:25:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:25:21,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:21,206 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 03:25:21,420 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:21,421 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:21,422 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-10-15 03:25:21,422 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:21,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84889461] [2019-10-15 03:25:21,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,423 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,561 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 03:25:21,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84889461] [2019-10-15 03:25:21,562 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:21,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:21,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106409770] [2019-10-15 03:25:21,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:21,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:21,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:21,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:21,564 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:21,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:21,578 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:21,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:21,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:21,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:21,580 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:21,580 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:21,581 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 03:25:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:21,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:21,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:21,587 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:21,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:21,589 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:21,589 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:21,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:21,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:21,591 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 03:25:21,591 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:21,592 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-10-15 03:25:21,592 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:21,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765907642] [2019-10-15 03:25:21,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:21,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,714 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 03:25:21,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765907642] [2019-10-15 03:25:21,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674713086] [2019-10-15 03:25:21,715 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 03:25:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:21,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:21,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:21,833 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 03:25:21,833 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:21,896 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 03:25:21,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054852409] [2019-10-15 03:25:21,949 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:21,949 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:21,957 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:21,966 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:21,967 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:22,194 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:24,207 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:24,297 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:24,302 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:24,711 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:24,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:24,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270385363] [2019-10-15 03:25:24,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:24,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:24,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:24,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:24,716 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:25,404 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:25,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:25,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:25,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:25,405 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:25,406 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:25,407 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 03:25:25,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:25,425 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:25,426 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:25,426 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:25,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:25,427 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 03:25:25,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:25,631 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-10-15 03:25:25,632 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:25,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075187016] [2019-10-15 03:25:25,633 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:25,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:25,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:25,718 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 03:25:25,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075187016] [2019-10-15 03:25:25,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852579365] [2019-10-15 03:25:25,719 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 03:25:25,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:25,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:25,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:25,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:25,829 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 03:25:25,830 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:25,874 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 03:25:25,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567851182] [2019-10-15 03:25:25,880 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:25,880 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:25,881 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:25,881 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:25,881 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:25,913 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:27,522 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:27,569 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:27,575 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:28,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:28,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:28,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480794053] [2019-10-15 03:25:28,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:28,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:28,019 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 18 states. [2019-10-15 03:25:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:28,772 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2019-10-15 03:25:28,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:28,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 32 [2019-10-15 03:25:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:28,774 INFO L225 Difference]: With dead ends: 42 [2019-10-15 03:25:28,774 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 03:25:28,775 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:25:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 03:25:28,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-15 03:25:28,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 03:25:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-15 03:25:28,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 32 [2019-10-15 03:25:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:28,782 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-15 03:25:28,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-15 03:25:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-15 03:25:28,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:28,784 INFO L380 BasicCegarLoop]: trace histogram [12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:28,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:28,989 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:28,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:28,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1430720737, now seen corresponding path program 3 times [2019-10-15 03:25:28,990 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:28,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063922088] [2019-10-15 03:25:28,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:28,991 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:28,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:29,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:29,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063922088] [2019-10-15 03:25:29,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968800960] [2019-10-15 03:25:29,120 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 03:25:29,255 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:29,255 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:29,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:25:29,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 03:25:29,307 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-15 03:25:29,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377787883] [2019-10-15 03:25:29,399 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:29,399 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:29,400 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:29,400 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:29,400 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:29,423 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:30,785 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:30,825 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:30,829 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:31,216 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:31,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 27 [2019-10-15 03:25:31,217 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808951328] [2019-10-15 03:25:31,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-15 03:25:31,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:31,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-15 03:25:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2019-10-15 03:25:31,219 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 28 states. [2019-10-15 03:25:32,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:32,456 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2019-10-15 03:25:32,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 03:25:32,456 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 41 [2019-10-15 03:25:32,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:32,457 INFO L225 Difference]: With dead ends: 53 [2019-10-15 03:25:32,457 INFO L226 Difference]: Without dead ends: 35 [2019-10-15 03:25:32,458 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=2151, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 03:25:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-15 03:25:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-15 03:25:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-15 03:25:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-15 03:25:32,466 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 41 [2019-10-15 03:25:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:32,467 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-15 03:25:32,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-15 03:25:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-15 03:25:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-15 03:25:32,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:32,469 INFO L380 BasicCegarLoop]: trace histogram [30, 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 03:25:32,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:32,682 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:32,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:32,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1473867866, now seen corresponding path program 4 times [2019-10-15 03:25:32,682 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:32,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555190691] [2019-10-15 03:25:32,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:32,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:32,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:32,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-10-15 03:25:32,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555190691] [2019-10-15 03:25:32,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740609850] [2019-10-15 03:25:32,821 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 03:25:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:32,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:25:32,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-10-15 03:25:32,994 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-10-15 03:25:33,062 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [112131971] [2019-10-15 03:25:33,063 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:33,064 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:33,064 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:33,064 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:33,064 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:33,080 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:34,608 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:34,642 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:34,646 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:34,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:34,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 23 [2019-10-15 03:25:34,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933687211] [2019-10-15 03:25:34,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:25:34,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:34,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:25:34,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:25:34,961 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 24 states. [2019-10-15 03:25:37,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:37,777 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2019-10-15 03:25:37,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 03:25:37,777 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 60 [2019-10-15 03:25:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:37,778 INFO L225 Difference]: With dead ends: 64 [2019-10-15 03:25:37,778 INFO L226 Difference]: Without dead ends: 40 [2019-10-15 03:25:37,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=1430, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 03:25:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-15 03:25:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-15 03:25:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 03:25:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2019-10-15 03:25:37,787 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 60 [2019-10-15 03:25:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:37,787 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2019-10-15 03:25:37,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 03:25:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2019-10-15 03:25:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 03:25:37,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:37,789 INFO L380 BasicCegarLoop]: trace histogram [30, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:37,993 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:37,994 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:37,994 INFO L82 PathProgramCache]: Analyzing trace with hash -303721663, now seen corresponding path program 5 times [2019-10-15 03:25:37,995 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:37,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721777099] [2019-10-15 03:25:37,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:37,996 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:37,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:25:38,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721777099] [2019-10-15 03:25:38,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253339188] [2019-10-15 03:25:38,220 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 03:25:38,381 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:25:38,381 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:38,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:38,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:38,412 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 246 proven. 1 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-10-15 03:25:38,412 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:25:38,438 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1776076336] [2019-10-15 03:25:38,439 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:38,440 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:38,440 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:38,441 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:38,441 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:38,461 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:39,830 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:39,869 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:39,872 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:40,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:40,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:40,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467719494] [2019-10-15 03:25:40,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:40,207 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:40,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:40,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:40,208 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 18 states. [2019-10-15 03:25:40,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:40,907 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2019-10-15 03:25:40,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:40,907 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2019-10-15 03:25:40,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:40,909 INFO L225 Difference]: With dead ends: 61 [2019-10-15 03:25:40,909 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 03:25:40,910 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 183 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 03:25:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 03:25:40,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-15 03:25:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 03:25:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-10-15 03:25:40,918 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 65 [2019-10-15 03:25:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:40,918 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-10-15 03:25:40,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:40,918 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-10-15 03:25:40,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 03:25:40,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:40,920 INFO L380 BasicCegarLoop]: trace histogram [30, 10, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:41,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:41,124 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:41,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1439118160, now seen corresponding path program 6 times [2019-10-15 03:25:41,125 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:41,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497089048] [2019-10-15 03:25:41,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,126 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:41,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:41,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:25:41,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497089048] [2019-10-15 03:25:41,324 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895263432] [2019-10-15 03:25:41,324 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 03:25:41,639 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:41,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:41,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:25:41,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 246 proven. 10 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2019-10-15 03:25:41,661 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2019-10-15 03:25:41,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1335237815] [2019-10-15 03:25:41,718 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:41,719 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:41,719 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:41,719 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:41,719 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:41,746 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:43,061 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:43,091 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:43,094 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:43,438 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:43,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 22 [2019-10-15 03:25:43,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556021132] [2019-10-15 03:25:43,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 03:25:43,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 03:25:43,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2019-10-15 03:25:43,442 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 23 states. [2019-10-15 03:25:44,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:44,237 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2019-10-15 03:25:44,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:25:44,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 68 [2019-10-15 03:25:44,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:44,239 INFO L225 Difference]: With dead ends: 66 [2019-10-15 03:25:44,239 INFO L226 Difference]: Without dead ends: 48 [2019-10-15 03:25:44,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1284, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 03:25:44,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-15 03:25:44,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-15 03:25:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-15 03:25:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-10-15 03:25:44,248 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 68 [2019-10-15 03:25:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:44,249 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-10-15 03:25:44,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 03:25:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-10-15 03:25:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-15 03:25:44,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:44,251 INFO L380 BasicCegarLoop]: trace histogram [30, 10, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:44,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:44,456 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1172269761, now seen corresponding path program 7 times [2019-10-15 03:25:44,457 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:44,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763095203] [2019-10-15 03:25:44,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:44,458 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:44,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY