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/max.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:20:12,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:20:12,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:20:12,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:20:12,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:20:12,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:20:12,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:20:12,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:20:12,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:20:12,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:20:12,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:20:12,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:20:12,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:20:12,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:20:12,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:20:12,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:20:12,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:20:12,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:20:12,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:20:12,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:20:12,350 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:20:12,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:20:12,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:20:12,353 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:20:12,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:20:12,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:20:12,363 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:20:12,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:20:12,364 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 [2019-10-13 23:20:12,388 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:20:12,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:20:12,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:20:12,390 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:20:12,390 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:20:12,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:20:12,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:20:12,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:20:12,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:20:12,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:20:12,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:20:12,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:20:12,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:20:12,395 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:20:12,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:20:12,395 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:20:12,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:20:12,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:20:12,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:20:12,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:20:12,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:20:12,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:20:12,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:20:12,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:20:12,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:20:12,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:20:12,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:20:12,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:20:12,401 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 [2019-10-13 23:20:12,659 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:20:12,672 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:20:12,676 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:20:12,677 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:20:12,677 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:20:12,678 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/max.i [2019-10-13 23:20:12,753 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9955c58/b957773c71724a2a8c0522665f8989c3/FLAGf866c5697 [2019-10-13 23:20:13,197 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:20:13,198 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/max.i [2019-10-13 23:20:13,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9955c58/b957773c71724a2a8c0522665f8989c3/FLAGf866c5697 [2019-10-13 23:20:13,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a9955c58/b957773c71724a2a8c0522665f8989c3 [2019-10-13 23:20:13,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:20:13,595 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:20:13,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:20:13,597 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:20:13,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:20:13,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:13,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ca977a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13, skipping insertion in model container [2019-10-13 23:20:13,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:13,611 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:20:13,630 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:20:13,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:20:13,889 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:20:13,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:20:13,923 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:20:13,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13 WrapperNode [2019-10-13 23:20:13,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:20:13,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:20:13,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:20:13,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:20:14,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:14,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:14,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:14,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:14,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:14,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:14,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (1/1) ... [2019-10-13 23:20:14,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:20:14,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:20:14,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:20:14,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:20:14,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (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 [2019-10-13 23:20:14,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:20:14,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:20:14,106 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2019-10-13 23:20:14,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:20:14,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:20:14,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:20:14,107 INFO L130 BoogieDeclarations]: Found specification of procedure max [2019-10-13 23:20:14,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:20:14,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:20:14,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:20:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:20:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:20:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:20:14,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:20:14,502 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:20:14,503 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 23:20:14,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:14 BoogieIcfgContainer [2019-10-13 23:20:14,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:20:14,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:20:14,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:20:14,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:20:14,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:20:13" (1/3) ... [2019-10-13 23:20:14,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324f382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:14, skipping insertion in model container [2019-10-13 23:20:14,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:13" (2/3) ... [2019-10-13 23:20:14,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@324f382 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:14, skipping insertion in model container [2019-10-13 23:20:14,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:14" (3/3) ... [2019-10-13 23:20:14,512 INFO L109 eAbstractionObserver]: Analyzing ICFG max.i [2019-10-13 23:20:14,522 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:20:14,530 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:20:14,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:20:14,566 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:20:14,566 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:20:14,566 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:20:14,566 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:20:14,566 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:20:14,566 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:20:14,567 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:20:14,567 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:20:14,583 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 23:20:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 23:20:14,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:14,590 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] [2019-10-13 23:20:14,592 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:14,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:14,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1922277371, now seen corresponding path program 1 times [2019-10-13 23:20:14,604 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:14,604 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663412688] [2019-10-13 23:20:14,604 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:14,605 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:14,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:20:14,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663412688] [2019-10-13 23:20:14,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938414889] [2019-10-13 23:20:14,858 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 [2019-10-13 23:20:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:14,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:20:14,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:20:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:20:15,013 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:20:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 23:20:15,106 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:20:15,107 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2019-10-13 23:20:15,107 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260079131] [2019-10-13 23:20:15,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:20:15,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:20:15,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:20:15,137 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2019-10-13 23:20:15,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:15,250 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-10-13 23:20:15,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:20:15,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-13 23:20:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:15,263 INFO L225 Difference]: With dead ends: 46 [2019-10-13 23:20:15,263 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 23:20:15,266 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:20:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 23:20:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 23:20:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 23:20:15,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-10-13 23:20:15,316 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 24 [2019-10-13 23:20:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:15,317 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-10-13 23:20:15,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:20:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-10-13 23:20:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 23:20:15,320 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:15,320 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] [2019-10-13 23:20:15,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:15,525 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1360249756, now seen corresponding path program 1 times [2019-10-13 23:20:15,526 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:15,527 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100471562] [2019-10-13 23:20:15,527 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:15,528 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:15,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:20:15,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100471562] [2019-10-13 23:20:15,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:20:15,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 23:20:15,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509995226] [2019-10-13 23:20:15,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 23:20:15,697 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:15,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 23:20:15,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:20:15,698 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2019-10-13 23:20:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:15,748 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-10-13 23:20:15,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 23:20:15,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-13 23:20:15,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:15,751 INFO L225 Difference]: With dead ends: 30 [2019-10-13 23:20:15,751 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 23:20:15,753 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 23:20:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 23:20:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 23:20:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 23:20:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2019-10-13 23:20:15,764 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 27 [2019-10-13 23:20:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:15,769 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2019-10-13 23:20:15,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 23:20:15,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2019-10-13 23:20:15,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 23:20:15,771 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:15,772 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] [2019-10-13 23:20:15,772 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1127678421, now seen corresponding path program 1 times [2019-10-13 23:20:15,773 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:15,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243423709] [2019-10-13 23:20:15,773 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:15,774 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:15,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:20:15,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243423709] [2019-10-13 23:20:15,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106928890] [2019-10-13 23:20:15,948 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 [2019-10-13 23:20:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:16,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 23:20:16,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:20:16,087 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:20:16,087 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:20:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 23:20:16,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1072609388] [2019-10-13 23:20:16,208 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:20:16,209 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:20:16,215 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:20:16,222 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:20:16,223 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:20:16,420 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-13 23:20:18,398 INFO L199 IcfgInterpreter]: Interpreting procedure max with input of size 1 for LOIs [2019-10-13 23:20:18,464 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-13 23:20:18,473 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:20:18,473 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:20:18,473 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 610#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= ~N~0 |old(~N~0)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:20:18,475 INFO L193 IcfgInterpreter]: Reachable states at location maxEXIT satisfy 606#(and (not (< max_~i~0 ~N~0)) (<= 0 max_~i~0) (= (ite (<= (mod max_~ret~0 4294967296) 2147483647) (mod max_~ret~0 4294967296) (+ (mod max_~ret~0 4294967296) (- 4294967296))) |max_#res|)) [2019-10-13 23:20:18,475 INFO L193 IcfgInterpreter]: Reachable states at location L36-1 satisfy 437#true [2019-10-13 23:20:18,476 INFO L193 IcfgInterpreter]: Reachable states at location L36 satisfy 480#(and (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) [2019-10-13 23:20:18,476 INFO L193 IcfgInterpreter]: Reachable states at location L27-1 satisfy 78#(or (exists ((v_max_~ret~0_BEFORE_RETURN_1 Int) (v_prenex_1 Int)) (or (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (+ (mod v_prenex_1 4294967296) (- 4294967296)) |main_#t~ret5|) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (not (<= (mod v_prenex_1 4294967296) 2147483647))) (and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= |main_#t~ret5| (mod v_max_~ret~0_BEFORE_RETURN_1 4294967296)) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= (mod v_max_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)))) (exists ((v_prenex_2 Int) (v_max_~ret~0_BEFORE_RETURN_2 Int)) (or (and (not (<= (mod v_prenex_2 4294967296) 2147483647)) (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= (+ (mod v_prenex_2 4294967296) (- 4294967296)) |main_#t~ret5|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= (mod v_max_~ret~0_BEFORE_RETURN_2 4294967296) |main_#t~ret5|) (= 0 |#NULL.base|) (<= ~N~0 2147483647) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= (mod v_max_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0))))) [2019-10-13 23:20:18,476 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 ~N~0) (= 0 |#NULL.base|) (<= 0 ~N~0) (<= |#NULL.base| 0) (<= ~N~0 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:20:18,476 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= ~N~0 0) (<= 0 |#NULL.base|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 ~N~0) (= |#valid| |old(#valid)|) (= ~N~0 |old(~N~0)|) (= |#memory_int| |old(#memory_int)|) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|)) [2019-10-13 23:20:18,477 INFO L193 IcfgInterpreter]: Reachable states at location L27 satisfy 43#(and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (select |old(#valid)| |main_~#x~0.base|) 0) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |main_~#x~0.offset|) (<= |main_~#x~0.offset| 0) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (<= 1 ~N~0) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) [2019-10-13 23:20:18,477 INFO L193 IcfgInterpreter]: Reachable states at location L38 satisfy 338#true [2019-10-13 23:20:18,488 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 615#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 ~N~0) (= 0 |#NULL.base|) (<= 0 ~N~0) (<= |#NULL.base| 0) (<= ~N~0 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:20:18,489 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 192#(or (and (not (= main_~ret~1 main_~ret2~0)) (exists ((v_prenex_29 Int) (v_prenex_30 Int) (v_max_~ret~0_BEFORE_RETURN_5 Int) (v_max_~ret~0_BEFORE_RETURN_6 Int)) (or (and (not (<= (mod v_prenex_29 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_prenex_29 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0)) (= main_~ret5~0 (+ (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) (- 4294967296)))) (and (= main_~ret5~0 (mod v_prenex_30 4294967296)) (<= (mod v_prenex_30 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (<= (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) main_~ret5~0) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0)))))) (and (exists ((v_prenex_29 Int) (v_prenex_30 Int) (v_max_~ret~0_BEFORE_RETURN_5 Int) (v_max_~ret~0_BEFORE_RETURN_6 Int)) (or (and (not (<= (mod v_prenex_29 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_prenex_29 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (not (<= (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0)) (= main_~ret5~0 (+ (mod v_max_~ret~0_BEFORE_RETURN_6 4294967296) (- 4294967296)))) (and (= main_~ret5~0 (mod v_prenex_30 4294967296)) (<= (mod v_prenex_30 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))) (and (<= (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_max_~ret~0_BEFORE_RETURN_5 4294967296) main_~ret5~0) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~1 1) ~N~0))))) (not (= main_~ret~1 main_~ret5~0)))) [2019-10-13 23:20:18,489 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:20:18,489 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 271#true [2019-10-13 23:20:18,489 INFO L193 IcfgInterpreter]: Reachable states at location maxENTRY satisfy 559#true [2019-10-13 23:20:18,489 INFO L193 IcfgInterpreter]: Reachable states at location L30-1 satisfy 545#true [2019-10-13 23:20:18,489 INFO L193 IcfgInterpreter]: Reachable states at location L32-3 satisfy 518#true [2019-10-13 23:20:18,490 INFO L193 IcfgInterpreter]: Reachable states at location L11-3 satisfy 601#(<= 0 max_~i~0) [2019-10-13 23:20:18,490 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 550#(exists ((v_max_~ret~0_BEFORE_RETURN_1 Int) (v_prenex_2 Int) (v_max_~ret~0_BEFORE_RETURN_2 Int) (v_prenex_1 Int)) (or (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (= main_~ret~1 (mod v_max_~ret~0_BEFORE_RETURN_1 4294967296)) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (<= (mod v_max_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= main_~ret~1 (+ (mod v_prenex_1 4294967296) (- 4294967296))) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (not (<= (mod v_prenex_1 4294967296) 2147483647))) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (not (<= (mod v_prenex_2 4294967296) 2147483647)) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= (+ (mod v_prenex_2 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0)) (and (= 0 |#NULL.base|) (= |#valid| (store |old(#valid)| |main_~#x~0.base| 1)) (= (store |old(#memory_int)| |main_~#x~0.base| (store (store (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset| (select (select |old(#memory_int)| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (+ |main_~#x~0.offset| 4) main_~temp~0)) |#memory_int|) (<= 0 |#NULL.base|) (< 1 ~N~0) (<= 0 |#NULL.offset|) (= |#length| (store |old(#length)| |main_~#x~0.base| (* ~N~0 4))) (<= 0 (+ ~N~0 2147483648)) (not (= |main_~#x~0.base| 0)) (< |main_~#x~0.base| |#StackHeapBarrier|) (= |main_~#x~0.offset| 0) (<= |old(~N~0)| 0) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (= (select |old(#valid)| |main_~#x~0.base|) 0) (= main_~temp~0 (select (select |old(#memory_int)| |main_~#x~0.base|) |main_~#x~0.offset|)) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (<= 0 (+ main_~ret~1 2147483648)) (<= (mod v_max_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647) (= 0 |old(~N~0)|) (<= main_~ret~1 2147483647) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= (mod v_max_~ret~0_BEFORE_RETURN_2 4294967296) main_~ret~1)))) [2019-10-13 23:20:18,490 INFO L193 IcfgInterpreter]: Reachable states at location L20 satisfy 38#(and (= 0 |#NULL.base|) (<= ~N~0 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 |old(~N~0)|) (<= 0 (+ ~N~0 2147483648)) (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (<= |old(~N~0)| 0) (<= 0 |old(~N~0)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|)) [2019-10-13 23:20:19,236 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:20:19,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 12] total 21 [2019-10-13 23:20:19,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607680216] [2019-10-13 23:20:19,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 23:20:19,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:19,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 23:20:19,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2019-10-13 23:20:19,242 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 22 states. [2019-10-13 23:20:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:19,895 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2019-10-13 23:20:19,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 23:20:19,895 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-10-13 23:20:19,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:19,896 INFO L225 Difference]: With dead ends: 36 [2019-10-13 23:20:19,896 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 23:20:19,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2019-10-13 23:20:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 23:20:19,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 23:20:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 23:20:19,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-10-13 23:20:19,905 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 28 [2019-10-13 23:20:19,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:19,905 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-10-13 23:20:19,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 23:20:19,906 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-10-13 23:20:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 23:20:19,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:19,907 INFO L380 BasicCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:20,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:20,111 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash 257299344, now seen corresponding path program 2 times [2019-10-13 23:20:20,113 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:20,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526592951] [2019-10-13 23:20:20,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:20,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:20,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat