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/array-crafted/bAnd5.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:30:35,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:30:35,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:30:35,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:30:35,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:30:35,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:30:35,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:30:35,459 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:30:35,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:30:35,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:30:35,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:30:35,464 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:30:35,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:30:35,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:30:35,466 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:30:35,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:30:35,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:30:35,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:30:35,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:30:35,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:30:35,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:30:35,476 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:30:35,477 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:30:35,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:30:35,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:30:35,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:30:35,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:30:35,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:30:35,495 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 21:30:35,526 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:30:35,526 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:30:35,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:30:35,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:30:35,528 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:30:35,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:30:35,529 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:30:35,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:30:35,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:30:35,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:30:35,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:30:35,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:30:35,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:30:35,531 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:30:35,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:30:35,532 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:30:35,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:30:35,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:30:35,532 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:30:35,532 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:30:35,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:30:35,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:30:35,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:30:35,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:30:35,534 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:30:35,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:30:35,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:30:35,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:30:35,535 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 21:30:35,817 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:30:35,833 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:30:35,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:30:35,839 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:30:35,839 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:30:35,840 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd5.i [2019-10-13 21:30:35,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0c9e5359/93a578f91580476e94c738e4e10ddce5/FLAG56b73c001 [2019-10-13 21:30:36,415 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:30:36,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd5.i [2019-10-13 21:30:36,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0c9e5359/93a578f91580476e94c738e4e10ddce5/FLAG56b73c001 [2019-10-13 21:30:36,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0c9e5359/93a578f91580476e94c738e4e10ddce5 [2019-10-13 21:30:36,790 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:30:36,792 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:30:36,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:30:36,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:30:36,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:30:36,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:30:36" (1/1) ... [2019-10-13 21:30:36,801 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 13.10 09:30:36, skipping insertion in model container [2019-10-13 21:30:36,801 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:30:36" (1/1) ... [2019-10-13 21:30:36,808 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:30:36,831 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:30:37,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:30:37,026 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:30:37,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:30:37,159 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:30:37,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37 WrapperNode [2019-10-13 21:30:37,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:30:37,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:30:37,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:30:37,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:30:37,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (1/1) ... [2019-10-13 21:30:37,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:30:37,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:30:37,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:30:37,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:30:37,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (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 21:30:37,264 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:30:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:30:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-10-13 21:30:37,265 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:30:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:30:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:30:37,265 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-10-13 21:30:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:30:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:30:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:30:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:30:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:30:37,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:30:37,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:30:37,663 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:30:37,664 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 21:30:37,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:30:37 BoogieIcfgContainer [2019-10-13 21:30:37,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:30:37,666 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:30:37,667 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:30:37,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:30:37,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:30:36" (1/3) ... [2019-10-13 21:30:37,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f16230e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:30:37, skipping insertion in model container [2019-10-13 21:30:37,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:30:37" (2/3) ... [2019-10-13 21:30:37,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f16230e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:30:37, skipping insertion in model container [2019-10-13 21:30:37,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:30:37" (3/3) ... [2019-10-13 21:30:37,674 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2019-10-13 21:30:37,686 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:30:37,698 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:30:37,709 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:30:37,731 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:30:37,731 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:30:37,731 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:30:37,731 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:30:37,731 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:30:37,732 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:30:37,732 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:30:37,732 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:30:37,747 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-13 21:30:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 21:30:37,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:37,754 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] [2019-10-13 21:30:37,756 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:37,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:37,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1426255065, now seen corresponding path program 1 times [2019-10-13 21:30:37,772 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:37,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030948660] [2019-10-13 21:30:37,772 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:37,773 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:37,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:30:38,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030948660] [2019-10-13 21:30:38,001 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:30:38,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:30:38,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225281203] [2019-10-13 21:30:38,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:30:38,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:30:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:30:38,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:30:38,025 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-10-13 21:30:38,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:30:38,101 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2019-10-13 21:30:38,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:30:38,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-13 21:30:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:30:38,113 INFO L225 Difference]: With dead ends: 44 [2019-10-13 21:30:38,113 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 21:30:38,117 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 [2019-10-13 21:30:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 21:30:38,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 21:30:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 21:30:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-13 21:30:38,159 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-13 21:30:38,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:30:38,160 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-13 21:30:38,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:30:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-13 21:30:38,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 21:30:38,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:38,163 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, 1] [2019-10-13 21:30:38,163 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:38,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1318016053, now seen corresponding path program 1 times [2019-10-13 21:30:38,164 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:38,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431829990] [2019-10-13 21:30:38,165 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,165 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:38,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:30:38,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431829990] [2019-10-13 21:30:38,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183683523] [2019-10-13 21:30:38,281 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 21:30:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:38,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:30:38,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:30:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:30:38,430 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:30:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 21:30:38,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987653178] [2019-10-13 21:30:38,508 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-13 21:30:38,508 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:30:38,515 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:30:38,524 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:30:38,525 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:30:38,753 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-13 21:30:40,628 INFO L199 IcfgInterpreter]: Interpreting procedure bAnd with input of size 1 for LOIs [2019-10-13 21:30:40,635 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-13 21:30:40,642 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:30:40,643 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:30:40,643 INFO L193 IcfgInterpreter]: Reachable states at location bAndENTRY satisfy 523#true [2019-10-13 21:30:40,643 INFO L193 IcfgInterpreter]: Reachable states at location L43 satisfy 449#(and (<= ~N~0 1) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~i~2 0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (<= 0 main_~i~2) (not (< (+ main_~i~2 1) ~N~0)) (= main_~i~2 0)) [2019-10-13 21:30:40,644 INFO L193 IcfgInterpreter]: Reachable states at location L22 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 21:30:40,644 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 537#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= ~N~0 |old(~N~0)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:30:40,644 INFO L193 IcfgInterpreter]: Reachable states at location L34 satisfy 96#(and (or (and (not (<= (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) 2147483647)) (= |main_#t~ret6| (+ (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) (- 4294967296))) (not (< main_~i~1 ~N~0))) (and (not (< main_~i~1 ~N~0)) (<= (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) 2147483647) (= |main_#t~ret6| (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296)))) (<= ~N~0 1)) [2019-10-13 21:30:40,644 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 214#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= ~N~0 1) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (<= main_~i~2 0) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (<= 0 main_~i~2) (= main_~i~2 0)) [2019-10-13 21:30:40,645 INFO L193 IcfgInterpreter]: Reachable states at location L45 satisfy 367#(and (or (and (<= ~N~0 1) (<= 0 (+ main_~ret2~0 2147483648)) (not (<= (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (= main_~ret5~0 (+ (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) (- 4294967296))) (not (< (+ main_~i~2 1) ~N~0)) (= main_~i~2 0)) (and (<= ~N~0 1) (<= 0 (+ main_~ret2~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (= main_~ret5~0 (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296)) (<= (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) 2147483647) (not (< (+ main_~i~2 1) ~N~0)) (= main_~i~2 0))) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (<= main_~i~2 0) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (<= 0 main_~i~2)) [2019-10-13 21:30:40,645 INFO L193 IcfgInterpreter]: Reachable states at location L46 satisfy 275#(and (<= 0 (+ main_~ret2~0 2147483648)) (<= ~N~0 1) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret5~0 2147483647) (<= main_~i~2 0) (<= 0 (+ main_~ret5~0 2147483648)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (<= 0 main_~i~2) (= main_~i~2 0)) [2019-10-13 21:30:40,645 INFO L193 IcfgInterpreter]: Reachable states at location L29-4 satisfy 78#(not (< main_~i~1 ~N~0)) [2019-10-13 21:30:40,646 INFO L193 IcfgInterpreter]: Reachable states at location L37-1 satisfy 509#(and (<= ~N~0 1) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret~0 2147483647)) [2019-10-13 21:30:40,646 INFO L193 IcfgInterpreter]: Reachable states at location L39-3 satisfy 492#(and (<= ~N~0 1) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~i~2 0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|)) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (<= 0 main_~i~2) (= main_~i~2 0)) [2019-10-13 21:30:40,647 INFO L193 IcfgInterpreter]: Reachable states at location L29-3 satisfy 73#true [2019-10-13 21:30:40,651 INFO L193 IcfgInterpreter]: Reachable states at location L13-3 satisfy 528#(and (= bAnd_~i~0 1) (= bAnd_~x.base |bAnd_#in~x.base|) (= |bAnd_#in~x.offset| bAnd_~x.offset) (<= bAnd_~i~0 1) (<= 1 bAnd_~i~0) (= bAnd_~res~0 (select (select |#memory_int| bAnd_~x.base) bAnd_~x.offset))) [2019-10-13 21:30:40,652 INFO L193 IcfgInterpreter]: Reachable states at location L37 satisfy 514#(and (or (and (not (< main_~i~1 ~N~0)) (= (mod main_~temp~0 4294967296) main_~ret~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod main_~temp~0 4294967296) 2147483647)) (and (not (< main_~i~1 ~N~0)) (= (mod main_~temp~0 4294967296) (+ main_~ret~0 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (< 2147483647 (mod main_~temp~0 4294967296)))) (<= ~N~0 1) (<= 0 (+ main_~ret~0 2147483648)) (<= main_~ret~0 2147483647)) [2019-10-13 21:30:40,653 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 21:30:40,653 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 21:30:40,653 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 542#(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 21:30:40,654 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:30:40,654 INFO L193 IcfgInterpreter]: Reachable states at location bAndEXIT satisfy 533#(and (<= ~N~0 1) (not (< bAnd_~i~0 ~N~0)) (= |bAnd_#res| (ite (<= (mod bAnd_~res~0 4294967296) 2147483647) (mod bAnd_~res~0 4294967296) (+ (mod bAnd_~res~0 4294967296) (- 4294967296)))) (= bAnd_~i~0 1) (= bAnd_~x.base |bAnd_#in~x.base|) (= |bAnd_#in~x.offset| bAnd_~x.offset) (<= bAnd_~i~0 1) (<= 1 bAnd_~i~0) (= bAnd_~res~0 (select (select |#memory_int| bAnd_~x.base) bAnd_~x.offset))) [2019-10-13 21:30:40,655 INFO L193 IcfgInterpreter]: Reachable states at location L43-1 satisfy 414#(and (<= main_~i~2 0) (or (and (<= ~N~0 1) (<= 0 (+ main_~ret2~0 2147483648)) (<= 0 (+ main_~ret~0 2147483648)) (= |main_#t~ret13| (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|)) (<= (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) 2147483647) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~2 1) ~N~0)) (= main_~i~2 0)) (and (<= ~N~0 1) (<= 0 (+ main_~ret2~0 2147483648)) (not (<= (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) 2147483647)) (<= 0 (+ main_~ret~0 2147483648)) (= |main_#t~ret13| (+ (mod (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|) 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) |main_~#x~0.offset|)) (= (select (select |#memory_int| |main_~#x~0.base|) (+ (* ~N~0 4) |main_~#x~0.offset| (- 4))) main_~temp~0) (not (< (+ main_~i~2 1) ~N~0)) (= main_~i~2 0))) (<= main_~ret~0 2147483647) (<= main_~ret2~0 2147483647) (<= 0 main_~i~2)) [2019-10-13 21:30:41,693 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2019-10-13 21:30:41,866 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2019-10-13 21:30:41,883 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:30:41,884 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4, 17] total 25 [2019-10-13 21:30:41,884 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833829522] [2019-10-13 21:30:41,889 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 21:30:41,890 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:30:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 21:30:41,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2019-10-13 21:30:41,894 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 25 states. [2019-10-13 21:30:42,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:30:42,182 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2019-10-13 21:30:42,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 21:30:42,182 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2019-10-13 21:30:42,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:30:42,183 INFO L225 Difference]: With dead ends: 36 [2019-10-13 21:30:42,184 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 21:30:42,185 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2019-10-13 21:30:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 21:30:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 21:30:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 21:30:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-10-13 21:30:42,192 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2019-10-13 21:30:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:30:42,192 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-10-13 21:30:42,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 21:30:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-10-13 21:30:42,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 21:30:42,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:42,194 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:30:42,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:30:42,400 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:42,400 INFO L82 PathProgramCache]: Analyzing trace with hash 108787747, now seen corresponding path program 1 times [2019-10-13 21:30:42,401 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:42,401 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077165001] [2019-10-13 21:30:42,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:42,401 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:42,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:30:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 21:30:42,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077165001] [2019-10-13 21:30:42,520 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:30:42,520 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:30:42,521 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472075149] [2019-10-13 21:30:42,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:30:42,522 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:30:42,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:30:42,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:30:42,523 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2019-10-13 21:30:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:30:42,557 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2019-10-13 21:30:42,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:30:42,558 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-13 21:30:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:30:42,559 INFO L225 Difference]: With dead ends: 33 [2019-10-13 21:30:42,559 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 21:30:42,559 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 21:30:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 21:30:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 21:30:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 21:30:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-10-13 21:30:42,567 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2019-10-13 21:30:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:30:42,569 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-10-13 21:30:42,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:30:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-10-13 21:30:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 21:30:42,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:30:42,571 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:30:42,571 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:30:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:30:42,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1067802980, now seen corresponding path program 1 times [2019-10-13 21:30:42,572 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:30:42,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043694759] [2019-10-13 21:30:42,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:42,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:30:42,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:30:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 21:30:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-13 21:30:42,746 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-13 21:30:42,746 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-13 21:30:42,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:30:42 BoogieIcfgContainer [2019-10-13 21:30:42,826 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:30:42,830 INFO L168 Benchmark]: Toolchain (without parser) took 6035.92 ms. Allocated memory was 138.9 MB in the beginning and 280.5 MB in the end (delta: 141.6 MB). Free memory was 102.3 MB in the beginning and 186.2 MB in the end (delta: -83.9 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:30:42,830 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:30:42,833 INFO L168 Benchmark]: CACSL2BoogieTranslator took 366.74 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 182.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:30:42,833 INFO L168 Benchmark]: Boogie Preprocessor took 40.86 ms. Allocated memory is still 202.9 MB. Free memory was 182.2 MB in the beginning and 179.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:30:42,836 INFO L168 Benchmark]: RCFGBuilder took 464.25 ms. Allocated memory is still 202.9 MB. Free memory was 179.8 MB in the beginning and 159.4 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:30:42,836 INFO L168 Benchmark]: TraceAbstraction took 5159.36 ms. Allocated memory was 202.9 MB in the beginning and 280.5 MB in the end (delta: 77.6 MB). Free memory was 158.8 MB in the beginning and 186.2 MB in the end (delta: -27.4 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:30:42,843 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 366.74 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 102.1 MB in the beginning and 182.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.86 ms. Allocated memory is still 202.9 MB. Free memory was 182.2 MB in the beginning and 179.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 464.25 ms. Allocated memory is still 202.9 MB. Free memory was 179.8 MB in the beginning and 159.4 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5159.36 ms. Allocated memory was 202.9 MB in the beginning and 280.5 MB in the end (delta: 77.6 MB). Free memory was 158.8 MB in the beginning and 186.2 MB in the end (delta: -27.4 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 46]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of bitwiseAnd at line 14. Possible FailurePath: [L6] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND TRUE N > 1 [L23] int x[N]; [L24] int temp; [L25] int ret; [L26] int ret2; [L27] int ret5; [L29] int i = 0; VAL [\old(N)=0, i=0, N=2, x={1:0}] [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ VAL [\old(N)=0, i=1, N=2, x={1:0}] [L29] COND TRUE i < N [L31] x[i] = __VERIFIER_nondet_int() [L29] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}] [L29] COND FALSE !(i < N) VAL [\old(N)=0, i=2, N=2, x={1:0}] [L34] CALL, EXPR bAnd(x) VAL [\old(N)=0, N=2, x={1:0}] [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 VAL [\old(N)=0, i=1, N=2, res=0, x={1:0}, x={1:0}] [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res & x[i] [L13] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L13] COND FALSE !(i < N) [L16] return res; [L34] RET, EXPR bAnd(x) VAL [\old(N)=0, bAnd(x)=0, i=2, N=2, x={1:0}] [L34] ret = bAnd(x) [L36] EXPR x[0] [L36] temp=x[0] [L36] EXPR x[1] [L36] x[0] = x[1] [L36] x[1] = temp VAL [\old(N)=0, i=2, N=2, ret=0, temp=0, x={1:0}] [L37] CALL, EXPR bAnd(x) VAL [\old(N)=0, N=2, x={1:0}] [L10] int i; [L11] long long res; [L12] EXPR x[0] [L12] res = x[0] [L13] i = 1 VAL [\old(N)=0, i=1, N=2, res=1, x={1:0}, x={1:0}] [L13] COND TRUE i < N [L14] EXPR x[i] [L14] res = res & x[i] [L13] i++ VAL [\old(N)=0, i=2, N=2, x={1:0}, x={1:0}] [L13] COND FALSE !(i < N) [L16] return res; [L37] RET, EXPR bAnd(x) VAL [\old(N)=0, bAnd(x)=-1, i=2, N=2, ret=0, temp=0, x={1:0}] [L37] ret2 = bAnd(x) [L38] EXPR x[0] [L38] temp=x[0] [L39] int i =0 ; VAL [\old(N)=0, i=2, i=0, N=2, ret=0, ret2=-1, temp=1, x={1:0}] [L39] COND TRUE i