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/avg10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:24:27,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:24:27,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:24:28,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:24:28,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:24:28,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:24:28,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:24:28,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:24:28,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:24:28,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:24:28,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:24:28,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:24:28,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:24:28,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:24:28,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:24:28,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:24:28,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:24:28,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:24:28,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:24:28,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:24:28,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:24:28,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:24:28,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:24:28,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:24:28,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:24:28,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:24:28,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:24:28,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:24:28,084 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 03:24:28,112 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:24:28,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:24:28,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:24:28,120 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:24:28,120 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:24:28,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:24:28,120 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:24:28,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:24:28,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:24:28,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:24:28,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:24:28,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:24:28,123 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:24:28,124 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:24:28,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:24:28,124 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:24:28,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:24:28,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:24:28,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:24:28,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:24:28,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:24:28,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:24:28,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:24:28,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:24:28,126 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:24:28,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:24:28,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:24:28,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:24:28,127 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 03:24:28,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:24:28,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:24:28,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:24:28,434 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:24:28,434 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:24:28,435 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/avg10-2.i [2019-10-15 03:24:28,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6c67617c/a176a8ace30d490f81083d2652127b2c/FLAG49cbaa2c1 [2019-10-15 03:24:28,959 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:24:28,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/avg10-2.i [2019-10-15 03:24:28,968 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6c67617c/a176a8ace30d490f81083d2652127b2c/FLAG49cbaa2c1 [2019-10-15 03:24:29,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6c67617c/a176a8ace30d490f81083d2652127b2c [2019-10-15 03:24:29,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:24:29,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:24:29,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:29,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:24:29,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:24:29,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1168eabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29, skipping insertion in model container [2019-10-15 03:24:29,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,366 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:24:29,387 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:24:29,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:29,610 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:24:29,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:29,729 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:24:29,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29 WrapperNode [2019-10-15 03:24:29,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:29,730 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:24:29,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:24:29,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:24:29,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (1/1) ... [2019-10-15 03:24:29,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:24:29,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:24:29,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:24:29,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:24:29,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (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 03:24:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:24:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:24:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2019-10-15 03:24:29,828 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:24:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:24:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:24:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2019-10-15 03:24:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 03:24:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:24:29,829 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 03:24:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 03:24:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 03:24:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:24:29,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:24:30,197 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:24:30,197 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 03:24:30,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:30 BoogieIcfgContainer [2019-10-15 03:24:30,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:24:30,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:24:30,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:24:30,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:24:30,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:24:29" (1/3) ... [2019-10-15 03:24:30,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30849470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:30, skipping insertion in model container [2019-10-15 03:24:30,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:29" (2/3) ... [2019-10-15 03:24:30,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30849470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:30, skipping insertion in model container [2019-10-15 03:24:30,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:30" (3/3) ... [2019-10-15 03:24:30,207 INFO L109 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2019-10-15 03:24:30,217 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:24:30,225 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:24:30,236 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:24:30,262 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:24:30,262 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:24:30,263 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:24:30,263 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:24:30,263 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:24:30,263 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:24:30,263 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:24:30,263 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:24:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:24:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:24:30,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:30,290 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 03:24:30,292 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:30,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:30,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2112018211, now seen corresponding path program 1 times [2019-10-15 03:24:30,308 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:30,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187565416] [2019-10-15 03:24:30,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:30,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:30,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:30,538 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 03:24:30,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187565416] [2019-10-15 03:24:30,543 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:30,544 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:30,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713270541] [2019-10-15 03:24:30,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:30,549 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:30,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:30,562 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-15 03:24:30,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:30,592 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-15 03:24:30,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:30,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:24:30,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:30,603 INFO L225 Difference]: With dead ends: 41 [2019-10-15 03:24:30,603 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:24:30,606 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 03:24:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:24:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:24:30,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:24:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-15 03:24:30,645 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-15 03:24:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:30,645 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-15 03:24:30,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-15 03:24:30,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:24:30,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:30,648 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 03:24:30,649 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:30,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:30,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2049651994, now seen corresponding path program 1 times [2019-10-15 03:24:30,650 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:30,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199405404] [2019-10-15 03:24:30,650 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:30,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:30,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:30,743 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 03:24:30,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199405404] [2019-10-15 03:24:30,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137712416] [2019-10-15 03:24:30,744 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 03:24:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:30,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 03:24:30,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:30,869 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 03:24:30,871 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:30,939 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 03:24:30,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 03:24:30,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 03:24:30,940 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637916800] [2019-10-15 03:24:30,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:30,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:30,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:30,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 03:24:30,945 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-15 03:24:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:30,968 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-15 03:24:30,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:30,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-15 03:24:30,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:30,971 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:24:30,971 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:24:30,972 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 03:24:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:24:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:24:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:24:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-15 03:24:30,978 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-15 03:24:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:30,979 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-15 03:24:30,979 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-15 03:24:30,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-15 03:24:30,980 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:30,980 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 03:24:31,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:24:31,188 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:31,188 INFO L82 PathProgramCache]: Analyzing trace with hash -575014574, now seen corresponding path program 1 times [2019-10-15 03:24:31,189 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:31,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349436791] [2019-10-15 03:24:31,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:31,189 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:31,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:31,316 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 03:24:31,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349436791] [2019-10-15 03:24:31,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:31,317 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:31,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671231279] [2019-10-15 03:24:31,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:31,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:31,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:31,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:31,319 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-15 03:24:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:31,337 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-15 03:24:31,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:31,339 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-15 03:24:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:31,341 INFO L225 Difference]: With dead ends: 31 [2019-10-15 03:24:31,341 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 03:24:31,342 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 03:24:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 03:24:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 03:24:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 03:24:31,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 03:24:31,352 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-15 03:24:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:31,359 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 03:24:31,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 03:24:31,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-15 03:24:31,361 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:31,361 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 03:24:31,362 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:31,362 INFO L82 PathProgramCache]: Analyzing trace with hash -202958309, now seen corresponding path program 1 times [2019-10-15 03:24:31,363 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:31,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569078842] [2019-10-15 03:24:31,363 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:31,364 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:31,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:31,475 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 03:24:31,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569078842] [2019-10-15 03:24:31,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721086357] [2019-10-15 03:24:31,477 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 03:24:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:31,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:24:31,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:31,590 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 03:24:31,591 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:31,623 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 03:24:31,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324508965] [2019-10-15 03:24:31,655 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 03:24:31,655 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:24:31,661 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:24:31,669 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:24:31,670 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:24:31,815 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 03:24:52,863 INFO L199 IcfgInterpreter]: Interpreting procedure avg with input of size 1 for LOIs [2019-10-15 03:24:52,896 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 03:24:52,899 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:24:55,156 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:24:55,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 03:24:55,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239229315] [2019-10-15 03:24:55,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 03:24:55,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:55,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 03:24:55,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2019-10-15 03:24:55,160 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states.