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/avg20-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:24:29,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:24:29,275 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:24:29,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:24:29,293 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:24:29,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:24:29,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:24:29,308 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:24:29,310 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:24:29,311 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:24:29,311 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:24:29,312 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:24:29,313 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:24:29,314 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:24:29,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:24:29,316 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:24:29,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:24:29,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:24:29,320 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:24:29,322 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:24:29,324 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:24:29,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:24:29,329 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:24:29,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:24:29,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:24:29,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:24:29,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:24:29,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:24:29,356 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 03:24:29,380 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:24:29,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:24:29,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:24:29,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:24:29,384 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:24:29,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:24:29,384 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:24:29,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:24:29,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:24:29,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:24:29,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:24:29,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:24:29,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:24:29,387 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:24:29,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:24:29,387 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:24:29,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:24:29,387 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:24:29,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:24:29,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:24:29,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:24:29,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:24:29,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:24:29,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:24:29,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:24:29,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:24:29,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:24:29,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:24:29,390 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 03:24:29,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:24:29,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:24:29,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:24:29,720 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:24:29,721 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:24:29,721 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg20-2.i [2019-10-15 03:24:29,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e208f29/6016c6bb2ed7496aaf622915d7c87cb6/FLAGd09b8be60 [2019-10-15 03:24:30,279 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:24:30,280 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg20-2.i [2019-10-15 03:24:30,286 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e208f29/6016c6bb2ed7496aaf622915d7c87cb6/FLAGd09b8be60 [2019-10-15 03:24:30,656 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45e208f29/6016c6bb2ed7496aaf622915d7c87cb6 [2019-10-15 03:24:30,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:24:30,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:24:30,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:30,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:24:30,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:24:30,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:30" (1/1) ... [2019-10-15 03:24:30,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f2c9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:30, skipping insertion in model container [2019-10-15 03:24:30,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:30" (1/1) ... [2019-10-15 03:24:30,685 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:24:30,704 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:24:30,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:30,898 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:24:30,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:31,022 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:24:31,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31 WrapperNode [2019-10-15 03:24:31,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:31,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:24:31,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:24:31,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:24:31,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (1/1) ... [2019-10-15 03:24:31,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (1/1) ... [2019-10-15 03:24:31,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (1/1) ... [2019-10-15 03:24:31,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (1/1) ... [2019-10-15 03:24:31,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (1/1) ... [2019-10-15 03:24:31,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (1/1) ... [2019-10-15 03:24:31,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (1/1) ... [2019-10-15 03:24:31,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:24:31,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:24:31,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:24:31,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:24:31,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (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 03:24:31,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:24:31,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:24:31,125 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-10-15 03:24:31,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:24:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:24:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:24:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-10-15 03:24:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:24:31,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:24:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:24:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:24:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:24:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:24:31,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:24:31,509 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:24:31,510 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:24:31,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:31 BoogieIcfgContainer [2019-10-15 03:24:31,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:24:31,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:24:31,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:24:31,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:24:31,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:24:30" (1/3) ... [2019-10-15 03:24:31,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77486f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:31, skipping insertion in model container [2019-10-15 03:24:31,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:31" (2/3) ... [2019-10-15 03:24:31,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77486f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:31, skipping insertion in model container [2019-10-15 03:24:31,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:31" (3/3) ... [2019-10-15 03:24:31,520 INFO L109 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2019-10-15 03:24:31,530 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:24:31,539 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:24:31,550 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:24:31,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:24:31,576 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:24:31,576 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:24:31,576 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:24:31,576 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:24:31,577 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:24:31,577 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:24:31,577 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:24:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:24:31,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:24:31,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:31,600 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 03:24:31,602 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:31,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2112018211, now seen corresponding path program 1 times [2019-10-15 03:24:31,614 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:31,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723280149] [2019-10-15 03:24:31,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:31,615 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:31,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:31,846 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 03:24:31,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723280149] [2019-10-15 03:24:31,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:31,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:31,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141046154] [2019-10-15 03:24:31,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:31,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:31,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:31,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:31,888 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:24:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:31,936 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:24:31,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:31,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:24:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:31,949 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:24:31,949 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:24:31,953 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 03:24:31,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:24:31,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:24:31,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:24:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:24:32,001 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:24:32,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:32,001 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:24:32,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:32,002 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:24:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:24:32,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:32,005 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 03:24:32,005 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:32,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2049651994, now seen corresponding path program 1 times [2019-10-15 03:24:32,006 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:32,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671019023] [2019-10-15 03:24:32,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:32,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:32,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:32,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:32,086 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 03:24:32,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671019023] [2019-10-15 03:24:32,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570889637] [2019-10-15 03:24:32,087 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 03:24:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:32,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:24:32,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:32,216 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 03:24:32,216 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:32,277 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 03:24:32,277 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:24:32,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:24:32,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758677041] [2019-10-15 03:24:32,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:32,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:32,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:24:32,282 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:24:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:32,301 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:24:32,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:32,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:24:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:32,303 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:24:32,303 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:24:32,304 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 03:24:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:24:32,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:24:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:24:32,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:24:32,310 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:24:32,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:32,310 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:24:32,310 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:32,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:24:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:24:32,312 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:32,312 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] [2019-10-15 03:24:32,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:24:32,513 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:32,514 INFO L82 PathProgramCache]: Analyzing trace with hash -575014574, now seen corresponding path program 1 times [2019-10-15 03:24:32,515 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:32,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36152500] [2019-10-15 03:24:32,515 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:32,516 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:32,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:32,638 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 03:24:32,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36152500] [2019-10-15 03:24:32,639 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:32,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:32,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112154865] [2019-10-15 03:24:32,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:32,640 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:32,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:32,641 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:24:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:32,655 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:24:32,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:32,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:24:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:32,658 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:24:32,659 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:24:32,659 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 03:24:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:24:32,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:24:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:24:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:24:32,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:24:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:32,672 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:24:32,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:24:32,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:24:32,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:32,674 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 03:24:32,674 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:32,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:32,675 INFO L82 PathProgramCache]: Analyzing trace with hash -202958309, now seen corresponding path program 1 times [2019-10-15 03:24:32,675 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:32,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626847452] [2019-10-15 03:24:32,676 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:32,676 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:32,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:32,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:32,762 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 03:24:32,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626847452] [2019-10-15 03:24:32,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840967577] [2019-10-15 03:24:32,764 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 03:24:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:32,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:24:32,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:32,896 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 03:24:32,897 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:32,931 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 03:24:32,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [589352823] [2019-10-15 03:24:32,962 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:24:32,963 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:24:32,970 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:24:32,978 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:24:32,979 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:24:33,194 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:24:50,194 INFO L199 IcfgInterpreter]: Interpreting procedure avg with input of size 1 for LOIs [2019-10-15 03:24:50,237 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:24:50,240 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:24:52,526 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:24:52,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:24:52,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074386946] [2019-10-15 03:24:52,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 03:24:52,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:52,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 03:24:52,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2019-10-15 03:24:52,529 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states.