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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:03:30,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:03:30,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:03:30,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:03:30,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:03:30,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:03:30,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:03:30,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:03:30,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:03:30,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:03:30,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:03:30,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:03:30,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:03:30,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:03:30,337 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:03:30,338 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:03:30,339 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:03:30,340 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:03:30,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:03:30,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:03:30,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:03:30,346 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:03:30,347 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:03:30,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:03:30,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:03:30,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:03:30,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:03:30,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:03:30,364 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 [2019-10-15 03:03:30,385 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:03:30,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:03:30,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:03:30,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:03:30,388 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:03:30,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:03:30,388 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:03:30,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:03:30,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:03:30,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:03:30,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:03:30,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:03:30,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:03:30,391 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:03:30,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:03:30,391 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:03:30,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:03:30,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:03:30,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:03:30,392 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:03:30,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:03:30,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:30,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:03:30,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:03:30,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:03:30,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:03:30,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:03:30,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:03:30,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:03:30,726 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:03:30,746 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:03:30,750 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:03:30,751 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:03:30,752 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:03:30,752 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-15 03:03:30,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17294ff1e/4d6077744e3c45048991834ccc04ac4a/FLAGda64667e1 [2019-10-15 03:03:31,305 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:03:31,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-10-15 03:03:31,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17294ff1e/4d6077744e3c45048991834ccc04ac4a/FLAGda64667e1 [2019-10-15 03:03:31,663 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17294ff1e/4d6077744e3c45048991834ccc04ac4a [2019-10-15 03:03:31,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:03:31,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:03:31,681 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:31,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:03:31,685 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:03:31,686 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:31,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7efb2e2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31, skipping insertion in model container [2019-10-15 03:03:31,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:31,699 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:03:31,713 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:03:31,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:31,904 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:03:31,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:03:31,934 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:03:31,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31 WrapperNode [2019-10-15 03:03:31,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:03:31,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:03:31,936 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:03:31,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:03:32,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:32,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:32,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:32,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:32,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:32,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:32,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... [2019-10-15 03:03:32,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:03:32,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:03:32,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:03:32,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:03:32,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:03:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:03:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:03:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:03:32,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:03:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:03:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:03:32,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:03:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:03:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:03:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:03:32,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:03:32,318 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:03:32,318 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:03:32,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:32 BoogieIcfgContainer [2019-10-15 03:03:32,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:03:32,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:03:32,328 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:03:32,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:03:32,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:03:31" (1/3) ... [2019-10-15 03:03:32,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a949daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:32, skipping insertion in model container [2019-10-15 03:03:32,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:03:31" (2/3) ... [2019-10-15 03:03:32,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a949daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:03:32, skipping insertion in model container [2019-10-15 03:03:32,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:03:32" (3/3) ... [2019-10-15 03:03:32,350 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-10-15 03:03:32,378 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:03:32,390 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:03:32,413 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:03:32,447 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:03:32,447 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:03:32,447 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:03:32,447 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:03:32,448 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:03:32,448 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:03:32,448 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:03:32,448 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:03:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-15 03:03:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:03:32,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:32,476 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:32,478 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:32,483 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-10-15 03:03:32,491 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:32,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213155613] [2019-10-15 03:03:32,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:32,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:32,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:32,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213155613] [2019-10-15 03:03:32,787 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:32,787 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 03:03:32,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025811320] [2019-10-15 03:03:32,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 03:03:32,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 03:03:32,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-15 03:03:32,806 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-10-15 03:03:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:32,997 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2019-10-15 03:03:32,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:03:33,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-10-15 03:03:33,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:33,017 INFO L225 Difference]: With dead ends: 50 [2019-10-15 03:03:33,017 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 03:03:33,026 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:03:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 03:03:33,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-15 03:03:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 03:03:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-10-15 03:03:33,096 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-10-15 03:03:33,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:33,097 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-10-15 03:03:33,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 03:03:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-10-15 03:03:33,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 03:03:33,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:33,100 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:33,100 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:33,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-10-15 03:03:33,103 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:33,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063977693] [2019-10-15 03:03:33,103 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:33,104 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:33,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:33,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063977693] [2019-10-15 03:03:33,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:03:33,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-15 03:03:33,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051402445] [2019-10-15 03:03:33,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:03:33,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:33,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:03:33,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:03:33,334 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2019-10-15 03:03:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:33,478 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-10-15 03:03:33,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 03:03:33,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-10-15 03:03:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:33,480 INFO L225 Difference]: With dead ends: 32 [2019-10-15 03:03:33,481 INFO L226 Difference]: Without dead ends: 28 [2019-10-15 03:03:33,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:03:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-15 03:03:33,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-10-15 03:03:33,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 03:03:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-15 03:03:33,491 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-10-15 03:03:33,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:33,491 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-15 03:03:33,492 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:03:33,492 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-15 03:03:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 03:03:33,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:33,493 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:33,493 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:33,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:33,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1450784830, now seen corresponding path program 1 times [2019-10-15 03:03:33,494 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:33,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295396780] [2019-10-15 03:03:33,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:33,495 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:33,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:33,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:03:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-15 03:03:33,559 INFO L168 tionRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-10-15 03:03:33,560 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-15 03:03:33,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 03:03:33 BoogieIcfgContainer [2019-10-15 03:03:33,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 03:03:33,591 INFO L168 Benchmark]: Toolchain (without parser) took 1911.02 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 105.5 MB in the beginning and 102.2 MB in the end (delta: 3.3 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:33,591 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-15 03:03:33,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.34 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 95.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:33,594 INFO L168 Benchmark]: Boogie Preprocessor took 109.07 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 95.9 MB in the beginning and 181.3 MB in the end (delta: -85.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:33,595 INFO L168 Benchmark]: RCFGBuilder took 280.71 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 168.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:33,596 INFO L168 Benchmark]: TraceAbstraction took 1259.80 ms. Allocated memory is still 202.9 MB. Free memory was 168.4 MB in the beginning and 102.2 MB in the end (delta: 66.2 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. [2019-10-15 03:03:33,600 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.34 ms. Allocated memory is still 141.0 MB. Free memory was 105.5 MB in the beginning and 95.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.07 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 95.9 MB in the beginning and 181.3 MB in the end (delta: -85.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 280.71 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 168.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1259.80 ms. Allocated memory is still 202.9 MB. Free memory was 168.4 MB in the beginning and 102.2 MB in the end (delta: 66.2 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i