/usr/bin/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/loop-lit/gsv2008.c.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:01:55,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:01:55,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:01:55,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:01:55,251 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:01:55,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:01:55,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:01:55,255 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:01:55,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:01:55,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:01:55,259 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:01:55,260 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:01:55,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:01:55,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:01:55,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:01:55,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:01:55,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:01:55,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:01:55,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:01:55,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:01:55,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:01:55,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:01:55,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:01:55,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:01:55,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-07 04:01:55,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-07 04:01:55,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-07 04:01:55,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-07 04:01:55,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-07 04:01:55,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-07 04:01:55,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-07 04:01:55,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-07 04:01:55,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-07 04:01:55,280 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-07 04:01:55,281 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-07 04:01:55,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-07 04:01:55,282 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-07 04:01:55,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-07 04:01:55,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:01:55,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:01:55,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:01:55,285 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 [2019-11-07 04:01:55,310 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:01:55,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:01:55,313 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:01:55,313 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:01:55,314 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:01:55,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:01:55,314 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:01:55,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:01:55,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:01:55,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:01:55,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:01:55,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:01:55,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:01:55,317 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:01:55,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:01:55,317 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:01:55,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:01:55,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:01:55,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:01:55,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:01:55,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:01:55,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:01:55,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:01:55,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:01:55,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:01:55,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:01:55,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:01:55,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:01:55,320 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 [2019-11-07 04:01:55,648 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:01:55,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:01:55,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:01:55,674 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:01:55,675 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:01:55,676 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2019-11-07 04:01:55,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016593fae/ee273d42bc1442eba492d965e1997d00/FLAGf6e0e7442 [2019-11-07 04:01:56,180 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:01:56,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2019-11-07 04:01:56,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016593fae/ee273d42bc1442eba492d965e1997d00/FLAGf6e0e7442 [2019-11-07 04:01:56,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016593fae/ee273d42bc1442eba492d965e1997d00 [2019-11-07 04:01:56,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:01:56,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:01:56,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:01:56,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:01:56,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:01:56,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:56,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373e4cca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56, skipping insertion in model container [2019-11-07 04:01:56,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:56,667 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:01:56,691 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:01:56,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:01:56,910 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:01:56,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:01:56,939 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:01:56,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56 WrapperNode [2019-11-07 04:01:56,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:01:56,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:01:56,940 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:01:56,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:01:56,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:56,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:56,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:56,956 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:57,043 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:57,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:57,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (1/1) ... [2019-11-07 04:01:57,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:01:57,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:01:57,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:01:57,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:01:57,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (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 [2019-11-07 04:01:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:01:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:01:57,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:01:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:01:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:01:57,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:01:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:01:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:01:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:01:57,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:01:57,315 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:01:57,315 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-07 04:01:57,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:01:57 BoogieIcfgContainer [2019-11-07 04:01:57,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:01:57,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:01:57,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:01:57,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:01:57,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:01:56" (1/3) ... [2019-11-07 04:01:57,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473b3274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:01:57, skipping insertion in model container [2019-11-07 04:01:57,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:01:56" (2/3) ... [2019-11-07 04:01:57,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473b3274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:01:57, skipping insertion in model container [2019-11-07 04:01:57,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:01:57" (3/3) ... [2019-11-07 04:01:57,341 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+lhb-reducer.c [2019-11-07 04:01:57,372 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:01:57,384 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:01:57,412 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:01:57,444 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:01:57,444 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:01:57,444 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:01:57,444 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:01:57,444 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:01:57,445 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:01:57,445 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:01:57,445 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:01:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-07 04:01:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 04:01:57,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:57,473 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:57,475 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:57,481 INFO L82 PathProgramCache]: Analyzing trace with hash -33153357, now seen corresponding path program 1 times [2019-11-07 04:01:57,488 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:57,488 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090594106] [2019-11-07 04:01:57,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:57,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:57,695 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090594106] [2019-11-07 04:01:57,696 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:01:57,696 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 04:01:57,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367046414] [2019-11-07 04:01:57,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:01:57,702 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:01:57,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:01:57,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 04:01:57,714 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2019-11-07 04:01:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:01:57,824 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-11-07 04:01:57,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:01:57,826 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-07 04:01:57,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:01:57,834 INFO L225 Difference]: With dead ends: 32 [2019-11-07 04:01:57,835 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 04:01:57,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-07 04:01:57,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 04:01:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 04:01:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 04:01:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-07 04:01:57,873 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-11-07 04:01:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:01:57,874 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-07 04:01:57,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:01:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-07 04:01:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 04:01:57,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:01:57,875 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:01:57,876 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:01:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:01:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1797693386, now seen corresponding path program 1 times [2019-11-07 04:01:57,876 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:01:57,877 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146051043] [2019-11-07 04:01:57,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:01:57,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:57,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:57,976 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146051043] [2019-11-07 04:01:57,979 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436620590] [2019-11-07 04:01:57,979 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 [2019-11-07 04:01:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:01:58,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 04:01:58,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:01:58,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:01:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:58,122 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:01:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:01:58,198 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 04:01:58,198 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-07 04:01:58,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342268672] [2019-11-07 04:01:58,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 04:01:58,200 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:01:58,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 04:01:58,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-07 04:01:58,201 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2019-11-07 04:01:58,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:01:58,235 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-07 04:01:58,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 04:01:58,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-07 04:01:58,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:01:58,236 INFO L225 Difference]: With dead ends: 15 [2019-11-07 04:01:58,237 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:01:58,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-07 04:01:58,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:01:58,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:01:58,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:01:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:01:58,239 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-11-07 04:01:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:01:58,240 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:01:58,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 04:01:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:01:58,240 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:01:58,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:01:58,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 04:01:58,476 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:01:58,477 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:01:58,477 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:01:58,477 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 04:01:58,477 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:01:58,477 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 04:01:58,478 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 9 69) the Hoare annotation is: true [2019-11-07 04:01:58,478 INFO L443 ceAbstractionStarter]: For program point L27(lines 27 66) no Hoare annotation was computed. [2019-11-07 04:01:58,478 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 52) no Hoare annotation was computed. [2019-11-07 04:01:58,478 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 9 69) no Hoare annotation was computed. [2019-11-07 04:01:58,478 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 67) no Hoare annotation was computed. [2019-11-07 04:01:58,478 INFO L443 ceAbstractionStarter]: For program point L52(line 52) no Hoare annotation was computed. [2019-11-07 04:01:58,479 INFO L443 ceAbstractionStarter]: For program point L50(lines 50 59) no Hoare annotation was computed. [2019-11-07 04:01:58,479 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 68) no Hoare annotation was computed. [2019-11-07 04:01:58,479 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 9 69) no Hoare annotation was computed. [2019-11-07 04:01:58,479 INFO L439 ceAbstractionStarter]: At program point L41(lines 28 62) the Hoare annotation is: (or (< main_~main__x~0 0) (< 0 main_~main__y~0)) [2019-11-07 04:01:58,480 INFO L443 ceAbstractionStarter]: For program point L35(lines 35 61) no Hoare annotation was computed. [2019-11-07 04:01:58,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:01:58 BoogieIcfgContainer [2019-11-07 04:01:58,495 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 04:01:58,498 INFO L168 Benchmark]: Toolchain (without parser) took 1856.59 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 102.4 MB in the beginning and 107.7 MB in the end (delta: -5.3 MB). Peak memory consumption was 58.2 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:58,499 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-07 04:01:58,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.41 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:58,501 INFO L168 Benchmark]: Boogie Preprocessor took 107.31 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:58,502 INFO L168 Benchmark]: RCFGBuilder took 269.14 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 167.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:58,503 INFO L168 Benchmark]: TraceAbstraction took 1173.73 ms. Allocated memory is still 201.3 MB. Free memory was 166.9 MB in the beginning and 107.7 MB in the end (delta: 59.2 MB). Peak memory consumption was 59.2 MB. Max. memory is 7.1 GB. [2019-11-07 04:01:58,508 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.41 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 92.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.31 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 92.5 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 269.14 ms. Allocated memory is still 201.3 MB. Free memory was 180.5 MB in the beginning and 167.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1173.73 ms. Allocated memory is still 201.3 MB. Free memory was 166.9 MB in the beginning and 107.7 MB in the end (delta: 59.2 MB). Peak memory consumption was 59.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 52]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: main__x < 0 || 0 < main__y - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. Result: SAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 13 SDslu, 57 SDs, 0 SdLazy, 27 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 6 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 13 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 2155 SizeOfPredicates, 6 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...