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/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:25:28,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:25:28,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:25:28,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:25:28,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:25:28,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:25:28,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:25:28,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:25:28,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:25:28,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:25:28,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:25:28,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:25:28,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:25:28,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:25:28,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:25:28,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:25:28,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:25:28,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:25:29,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:25:29,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:25:29,004 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:25:29,005 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:25:29,006 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:25:29,007 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:25:29,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:25:29,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:25:29,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:25:29,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:25:29,029 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 03:25:29,054 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:25:29,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:25:29,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:25:29,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:25:29,056 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:25:29,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:25:29,057 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:25:29,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:25:29,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:25:29,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:25:29,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:25:29,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:25:29,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:25:29,060 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:25:29,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:25:29,060 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:25:29,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:25:29,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:25:29,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:25:29,061 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:25:29,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:25:29,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:25:29,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:25:29,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:25:29,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:25:29,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:25:29,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:25:29,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:25:29,063 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 03:25:29,386 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:25:29,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:25:29,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:25:29,406 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:25:29,406 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:25:29,407 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-15 03:25:29,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9140f1c/a131b4a2fb2d4021859c7d6735bc7796/FLAG033366909 [2019-10-15 03:25:29,934 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:25:29,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-15 03:25:29,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9140f1c/a131b4a2fb2d4021859c7d6735bc7796/FLAG033366909 [2019-10-15 03:25:30,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9140f1c/a131b4a2fb2d4021859c7d6735bc7796 [2019-10-15 03:25:30,321 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:25:30,323 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:25:30,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:30,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:25:30,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:25:30,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18da5b9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30, skipping insertion in model container [2019-10-15 03:25:30,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,340 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:25:30,361 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:25:30,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:30,567 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:25:30,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:25:30,701 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:25:30,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30 WrapperNode [2019-10-15 03:25:30,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:25:30,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:25:30,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:25:30,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:25:30,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,737 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (1/1) ... [2019-10-15 03:25:30,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:25:30,747 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:25:30,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:25:30,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:25:30,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (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 03:25:30,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:25:30,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:25:30,803 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-15 03:25:30,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:25:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:25:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:25:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-15 03:25:30,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:25:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:25:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:25:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:25:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:25:30,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:25:30,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:25:31,210 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:25:31,211 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:25:31,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:31 BoogieIcfgContainer [2019-10-15 03:25:31,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:25:31,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:25:31,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:25:31,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:25:31,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:25:30" (1/3) ... [2019-10-15 03:25:31,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec31c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:31, skipping insertion in model container [2019-10-15 03:25:31,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:25:30" (2/3) ... [2019-10-15 03:25:31,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec31c3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:25:31, skipping insertion in model container [2019-10-15 03:25:31,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:25:31" (3/3) ... [2019-10-15 03:25:31,220 INFO L109 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2019-10-15 03:25:31,230 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:25:31,238 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:25:31,247 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:25:31,270 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:25:31,270 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:25:31,270 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:25:31,270 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:25:31,270 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:25:31,270 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:25:31,271 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:25:31,271 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:25:31,287 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:25:31,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:25:31,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:31,294 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 03:25:31,295 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:31,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-10-15 03:25:31,307 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:31,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806088863] [2019-10-15 03:25:31,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:31,308 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:31,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:31,518 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 03:25:31,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806088863] [2019-10-15 03:25:31,520 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:31,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:31,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634631077] [2019-10-15 03:25:31,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:31,526 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:31,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:31,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:31,545 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:25:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:31,586 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:25:31,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:31,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:25:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:31,598 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:25:31,598 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:25:31,602 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 03:25:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:25:31,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:25:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:25:31,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:25:31,649 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:25:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:31,650 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:25:31,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:25:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:25:31,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:31,653 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 03:25:31,653 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:31,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:31,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-10-15 03:25:31,654 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:31,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842474543] [2019-10-15 03:25:31,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:31,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:31,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:31,745 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 03:25:31,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842474543] [2019-10-15 03:25:31,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461525825] [2019-10-15 03:25:31,746 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 03:25:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:31,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:25:31,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:31,893 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 03:25:31,893 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:31,934 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 03:25:31,934 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:25:31,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:25:31,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805082089] [2019-10-15 03:25:31,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:31,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:31,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:31,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:25:31,938 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:25:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:31,949 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:25:31,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:31,949 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:25:31,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:31,951 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:25:31,951 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:25:31,952 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 03:25:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:25:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:25:31,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:25:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:25:31,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:25:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:31,958 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:25:31,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:25:31,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:25:31,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:31,960 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 03:25:32,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:32,173 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:32,174 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-10-15 03:25:32,174 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:32,175 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061529694] [2019-10-15 03:25:32,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:32,175 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:32,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:32,271 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 03:25:32,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061529694] [2019-10-15 03:25:32,272 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:25:32,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:25:32,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006503198] [2019-10-15 03:25:32,273 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:25:32,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:32,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:25:32,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:25:32,274 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:25:32,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:32,286 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:25:32,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:25:32,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:25:32,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:32,289 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:25:32,289 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:25:32,290 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 03:25:32,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:25:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:25:32,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:25:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:25:32,303 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:25:32,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:32,309 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:25:32,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:25:32,309 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:25:32,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:25:32,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:32,312 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 03:25:32,312 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:32,313 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-10-15 03:25:32,313 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:32,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359469058] [2019-10-15 03:25:32,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:32,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:32,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:32,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:32,433 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 03:25:32,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359469058] [2019-10-15 03:25:32,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261026004] [2019-10-15 03:25:32,434 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 03:25:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:32,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:32,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:32,551 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 03:25:32,552 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:32,607 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 03:25:32,608 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1667525978] [2019-10-15 03:25:32,653 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:32,654 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:32,665 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:32,679 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:32,680 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:32,861 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:34,925 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:35,035 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:35,043 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:35,505 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:35,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:25:35,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082719819] [2019-10-15 03:25:35,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-15 03:25:35,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:35,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-15 03:25:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-15 03:25:35,510 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-15 03:25:36,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:36,199 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-15 03:25:36,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:25:36,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-15 03:25:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:36,200 INFO L225 Difference]: With dead ends: 40 [2019-10-15 03:25:36,200 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:25:36,201 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 03:25:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:25:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-15 03:25:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-15 03:25:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-15 03:25:36,208 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-15 03:25:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:36,208 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-15 03:25:36,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-15 03:25:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-15 03:25:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:25:36,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:36,210 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 03:25:36,414 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:36,414 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:36,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:36,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-10-15 03:25:36,415 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:36,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144185990] [2019-10-15 03:25:36,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:36,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:36,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:36,537 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 03:25:36,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144185990] [2019-10-15 03:25:36,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903005] [2019-10-15 03:25:36,538 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 03:25:36,642 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:25:36,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:36,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:36,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:36,669 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 03:25:36,670 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:36,704 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 03:25:36,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684477509] [2019-10-15 03:25:36,707 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:36,710 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:36,710 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:36,711 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:36,711 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:36,744 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:38,272 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:38,317 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:38,321 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:38,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:38,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-15 03:25:38,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950935287] [2019-10-15 03:25:38,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 03:25:38,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 03:25:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-15 03:25:38,795 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-15 03:25:39,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:39,784 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-15 03:25:39,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 03:25:39,785 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-15 03:25:39,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:39,785 INFO L225 Difference]: With dead ends: 44 [2019-10-15 03:25:39,786 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 03:25:39,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-15 03:25:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 03:25:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 03:25:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 03:25:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-15 03:25:39,794 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-15 03:25:39,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:39,794 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-15 03:25:39,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 03:25:39,794 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-15 03:25:39,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 03:25:39,795 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:39,796 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 03:25:39,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:39,997 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:39,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1603069542, now seen corresponding path program 3 times [2019-10-15 03:25:39,998 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:39,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879731462] [2019-10-15 03:25:39,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:39,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:39,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:40,105 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 03:25:40,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879731462] [2019-10-15 03:25:40,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077006158] [2019-10-15 03:25:40,105 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 03:25:40,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:40,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:40,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 03:25:40,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:40,251 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 03:25:40,251 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:40,341 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 03:25:40,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1286943871] [2019-10-15 03:25:40,343 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:40,344 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:40,345 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:40,345 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:40,346 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:40,368 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:42,128 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:42,160 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:42,163 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:42,551 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:42,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-15 03:25:42,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016081759] [2019-10-15 03:25:42,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 03:25:42,553 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:42,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 03:25:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-15 03:25:42,554 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-15 03:25:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:43,486 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-15 03:25:43,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-15 03:25:43,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-15 03:25:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:43,488 INFO L225 Difference]: With dead ends: 54 [2019-10-15 03:25:43,488 INFO L226 Difference]: Without dead ends: 36 [2019-10-15 03:25:43,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-15 03:25:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-15 03:25:43,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-15 03:25:43,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:25:43,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-15 03:25:43,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-15 03:25:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:43,498 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-15 03:25:43,498 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 03:25:43,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-15 03:25:43,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-15 03:25:43,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:43,500 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 03:25:43,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:43,711 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1700782945, now seen corresponding path program 4 times [2019-10-15 03:25:43,712 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:43,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743357237] [2019-10-15 03:25:43,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:43,713 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:43,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:43,921 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 03:25:43,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743357237] [2019-10-15 03:25:43,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915490818] [2019-10-15 03:25:43,922 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 03:25:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:44,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:25:44,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:44,079 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 03:25:44,079 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:44,374 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 03:25:44,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [360441791] [2019-10-15 03:25:44,376 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:44,377 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:44,377 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:44,378 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:44,378 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:44,406 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:45,652 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:45,682 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:45,686 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:46,118 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:46,118 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-15 03:25:46,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628007827] [2019-10-15 03:25:46,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-15 03:25:46,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-15 03:25:46,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 03:25:46,122 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-15 03:25:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:47,650 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-15 03:25:47,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-15 03:25:47,650 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-15 03:25:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:47,652 INFO L225 Difference]: With dead ends: 68 [2019-10-15 03:25:47,652 INFO L226 Difference]: Without dead ends: 50 [2019-10-15 03:25:47,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-15 03:25:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-15 03:25:47,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-15 03:25:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-15 03:25:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-15 03:25:47,665 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-15 03:25:47,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:47,665 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-15 03:25:47,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-15 03:25:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-15 03:25:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 03:25:47,667 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:47,667 INFO L380 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:47,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:47,875 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:47,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1773432895, now seen corresponding path program 5 times [2019-10-15 03:25:47,876 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:47,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859241721] [2019-10-15 03:25:47,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,877 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:47,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-15 03:25:48,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859241721] [2019-10-15 03:25:48,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643878311] [2019-10-15 03:25:48,328 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 03:25:48,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:25:48,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:48,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:25:48,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-15 03:25:48,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-15 03:25:48,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303568454] [2019-10-15 03:25:48,643 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:48,644 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:48,644 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:48,644 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:48,644 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:48,667 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:49,912 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:49,946 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:49,949 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:50,664 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:50,665 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-15 03:25:50,665 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324424613] [2019-10-15 03:25:50,666 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-15 03:25:50,666 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-15 03:25:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-15 03:25:50,667 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-15 03:25:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:52,796 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-15 03:25:52,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-15 03:25:52,797 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-15 03:25:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:52,798 INFO L225 Difference]: With dead ends: 72 [2019-10-15 03:25:52,799 INFO L226 Difference]: Without dead ends: 54 [2019-10-15 03:25:52,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-15 03:25:52,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-15 03:25:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-15 03:25:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-15 03:25:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-15 03:25:52,810 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-15 03:25:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:52,810 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-15 03:25:52,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-15 03:25:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-15 03:25:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 03:25:52,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:52,812 INFO L380 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:53,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:53,028 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash -806625269, now seen corresponding path program 6 times [2019-10-15 03:25:53,029 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:53,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765060200] [2019-10-15 03:25:53,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:53,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:53,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:25:53,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765060200] [2019-10-15 03:25:53,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898864239] [2019-10-15 03:25:53,515 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 03:25:53,743 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:25:53,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:25:53,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-15 03:25:53,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:25:53,774 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-15 03:25:54,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1360125833] [2019-10-15 03:25:54,722 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:54,722 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:54,723 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:54,723 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:54,723 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:54,740 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:25:55,911 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:25:55,942 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:25:55,945 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:25:56,441 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:25:56,441 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 53 [2019-10-15 03:25:56,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346688660] [2019-10-15 03:25:56,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-15 03:25:56,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:25:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-15 03:25:56,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1930, Unknown=0, NotChecked=0, Total=2862 [2019-10-15 03:25:56,445 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 54 states. [2019-10-15 03:25:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:25:58,724 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2019-10-15 03:25:58,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 03:25:58,725 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 67 [2019-10-15 03:25:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:25:58,726 INFO L225 Difference]: With dead ends: 88 [2019-10-15 03:25:58,726 INFO L226 Difference]: Without dead ends: 67 [2019-10-15 03:25:58,729 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 165 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2707, Invalid=7595, Unknown=0, NotChecked=0, Total=10302 [2019-10-15 03:25:58,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-15 03:25:58,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-15 03:25:58,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-15 03:25:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-10-15 03:25:58,738 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 67 [2019-10-15 03:25:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:25:58,738 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-10-15 03:25:58,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-15 03:25:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-10-15 03:25:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-15 03:25:58,740 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:25:58,740 INFO L380 BasicCegarLoop]: trace histogram [40, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:25:58,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:25:58,954 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:25:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:25:58,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2020178544, now seen corresponding path program 7 times [2019-10-15 03:25:58,955 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:25:58,955 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122190329] [2019-10-15 03:25:58,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:58,956 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:25:58,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:25:59,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-15 03:25:59,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122190329] [2019-10-15 03:25:59,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232542426] [2019-10-15 03:25:59,077 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 03:25:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:25:59,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:25:59,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:25:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-15 03:25:59,355 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:25:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-15 03:25:59,414 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536430418] [2019-10-15 03:25:59,418 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:25:59,419 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:25:59,419 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:25:59,419 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:25:59,420 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:25:59,436 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:00,663 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:26:00,703 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:00,705 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:26:01,051 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:26:01,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 03:26:01,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637990836] [2019-10-15 03:26:01,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 03:26:01,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:26:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 03:26:01,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2019-10-15 03:26:01,054 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 24 states. [2019-10-15 03:26:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:26:01,985 INFO L93 Difference]: Finished difference Result 93 states and 108 transitions. [2019-10-15 03:26:01,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-15 03:26:01,985 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 80 [2019-10-15 03:26:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:26:01,987 INFO L225 Difference]: With dead ends: 93 [2019-10-15 03:26:01,987 INFO L226 Difference]: Without dead ends: 73 [2019-10-15 03:26:01,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=1369, Unknown=0, NotChecked=0, Total=1722 [2019-10-15 03:26:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-15 03:26:01,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-10-15 03:26:01,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-15 03:26:01,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-15 03:26:01,998 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 80 [2019-10-15 03:26:01,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:26:01,999 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-15 03:26:01,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 03:26:01,999 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-15 03:26:02,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-15 03:26:02,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:26:02,001 INFO L380 BasicCegarLoop]: trace histogram [40, 30, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:26:02,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:26:02,206 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:26:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:26:02,206 INFO L82 PathProgramCache]: Analyzing trace with hash 20741968, now seen corresponding path program 8 times [2019-10-15 03:26:02,207 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:26:02,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732091181] [2019-10-15 03:26:02,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:02,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:26:02,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:26:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:26:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 122 proven. 177 refuted. 0 times theorem prover too weak. 1065 trivial. 0 not checked. [2019-10-15 03:26:02,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732091181] [2019-10-15 03:26:02,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007083493] [2019-10-15 03:26:02,499 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 03:26:02,778 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-15 03:26:02,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:26:02,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:26:02,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:26:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 246 proven. 10 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2019-10-15 03:26:02,870 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:26:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1364 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1354 trivial. 0 not checked. [2019-10-15 03:26:02,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949897237] [2019-10-15 03:26:02,956 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:26:02,956 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:26:02,956 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:26:02,957 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:26:02,957 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:26:02,971 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:26:04,094 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-15 03:26:04,119 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:26:04,121 INFO L183 IcfgInterpreter]: Interpretation finished