java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:20:51,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:20:51,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:20:51,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:20:51,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:20:51,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:20:51,247 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:20:51,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:20:51,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:20:51,263 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:20:51,264 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:20:51,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:20:51,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:20:51,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:20:51,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:20:51,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:20:51,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:20:51,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:20:51,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:20:51,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:20:51,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:20:51,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:20:51,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:20:51,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:20:51,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:20:51,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:20:51,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:20:51,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:20:51,311 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:20:51,344 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:20:51,344 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:20:51,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:20:51,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:20:51,351 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:20:51,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:20:51,352 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:20:51,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:20:51,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:20:51,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:20:51,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:20:51,353 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:20:51,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:20:51,353 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:20:51,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:20:51,353 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:20:51,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:20:51,354 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:20:51,354 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:20:51,354 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:20:51,354 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:20:51,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:20:51,355 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:20:51,355 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:20:51,355 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:20:51,355 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:20:51,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:20:51,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:20:51,356 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:20:51,634 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:20:51,646 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:20:51,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:20:51,651 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:20:51,652 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:20:51,652 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-13 23:20:51,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4784f2380/3b07d9161b5c452993fb54b9e4b765df/FLAG47d5b0a0b [2019-10-13 23:20:52,170 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:20:52,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep40-1.i [2019-10-13 23:20:52,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4784f2380/3b07d9161b5c452993fb54b9e4b765df/FLAG47d5b0a0b [2019-10-13 23:20:52,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4784f2380/3b07d9161b5c452993fb54b9e4b765df [2019-10-13 23:20:52,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:20:52,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:20:52,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:20:52,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:20:52,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:20:52,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:52,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea19e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52, skipping insertion in model container [2019-10-13 23:20:52,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:52,604 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:20:52,625 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:20:52,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:20:52,828 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:20:52,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:20:52,870 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:20:52,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52 WrapperNode [2019-10-13 23:20:52,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:20:52,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:20:52,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:20:52,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:20:52,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:52,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:52,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:52,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:52,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:53,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:53,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... [2019-10-13 23:20:53,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:20:53,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:20:53,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:20:53,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:20:53,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:20:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:20:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:20:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-13 23:20:53,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:20:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:20:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:20:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-13 23:20:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 23:20:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:20:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 23:20:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 23:20:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 23:20:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:20:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:20:53,519 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:20:53,519 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 23:20:53,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:53 BoogieIcfgContainer [2019-10-13 23:20:53,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:20:53,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:20:53,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:20:53,525 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:20:53,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:20:52" (1/3) ... [2019-10-13 23:20:53,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618348d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:53, skipping insertion in model container [2019-10-13 23:20:53,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:20:52" (2/3) ... [2019-10-13 23:20:53,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@618348d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:53, skipping insertion in model container [2019-10-13 23:20:53,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:53" (3/3) ... [2019-10-13 23:20:53,535 INFO L109 eAbstractionObserver]: Analyzing ICFG sep40-1.i [2019-10-13 23:20:53,544 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:20:53,553 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:20:53,564 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:20:53,589 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:20:53,590 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:20:53,590 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:20:53,590 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:20:53,590 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:20:53,590 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:20:53,590 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:20:53,591 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:20:53,609 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-13 23:20:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 23:20:53,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:53,618 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:53,620 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:53,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:53,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1553264816, now seen corresponding path program 1 times [2019-10-13 23:20:53,636 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:53,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30507880] [2019-10-13 23:20:53,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:53,637 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:53,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:53,801 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 23:20:53,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30507880] [2019-10-13 23:20:53,802 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:20:53,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:20:53,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351310942] [2019-10-13 23:20:53,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:20:53,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:53,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:20:53,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:20:53,821 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-10-13 23:20:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:53,856 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2019-10-13 23:20:53,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:20:53,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-13 23:20:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:53,866 INFO L225 Difference]: With dead ends: 41 [2019-10-13 23:20:53,867 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 23:20:53,870 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 23:20:53,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 23:20:53,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 23:20:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 23:20:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2019-10-13 23:20:53,912 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 24 [2019-10-13 23:20:53,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:53,913 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2019-10-13 23:20:53,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:20:53,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2019-10-13 23:20:53,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 23:20:53,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:53,915 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 23:20:53,916 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1274606805, now seen corresponding path program 1 times [2019-10-13 23:20:53,917 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:53,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090407419] [2019-10-13 23:20:53,917 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:53,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:53,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:54,006 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 23:20:54,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090407419] [2019-10-13 23:20:54,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542916970] [2019-10-13 23:20:54,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:54,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 23:20:54,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:20:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 23:20:54,155 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:20:54,200 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 23:20:54,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 23:20:54,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-13 23:20:54,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257196638] [2019-10-13 23:20:54,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:20:54,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:54,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:20:54,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:20:54,203 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 3 states. [2019-10-13 23:20:54,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:54,220 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-13 23:20:54,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:20:54,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-10-13 23:20:54,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:54,222 INFO L225 Difference]: With dead ends: 33 [2019-10-13 23:20:54,222 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 23:20:54,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 23:20:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 23:20:54,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 23:20:54,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 23:20:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-10-13 23:20:54,229 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 25 [2019-10-13 23:20:54,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:54,229 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-10-13 23:20:54,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:20:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-10-13 23:20:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 23:20:54,231 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:54,231 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:54,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:54,437 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:54,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:54,437 INFO L82 PathProgramCache]: Analyzing trace with hash -544560989, now seen corresponding path program 1 times [2019-10-13 23:20:54,438 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:54,438 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765755920] [2019-10-13 23:20:54,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:54,439 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:54,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:20:54,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765755920] [2019-10-13 23:20:54,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:20:54,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:20:54,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671019370] [2019-10-13 23:20:54,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:20:54,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:54,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:20:54,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:20:54,575 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-10-13 23:20:54,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:54,585 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-13 23:20:54,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:20:54,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-13 23:20:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:54,587 INFO L225 Difference]: With dead ends: 31 [2019-10-13 23:20:54,588 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 23:20:54,588 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 23:20:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 23:20:54,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 23:20:54,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 23:20:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-13 23:20:54,595 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2019-10-13 23:20:54,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:54,597 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-13 23:20:54,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:20:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-13 23:20:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 23:20:54,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:54,599 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:54,599 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:54,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:54,600 INFO L82 PathProgramCache]: Analyzing trace with hash -5957836, now seen corresponding path program 1 times [2019-10-13 23:20:54,600 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:54,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106612527] [2019-10-13 23:20:54,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:54,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:54,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:54,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:20:54,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106612527] [2019-10-13 23:20:54,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623510417] [2019-10-13 23:20:54,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:20:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:54,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:20:54,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:20:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:20:54,799 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:20:54,831 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:20:54,831 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [737790425] [2019-10-13 23:20:54,868 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:20:54,868 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:20:54,876 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:20:54,882 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:20:54,882 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:20:55,007 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 23:20:57,212 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-13 23:20:57,275 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 23:20:57,279 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:20:57,279 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:20:57,280 INFO L193 IcfgInterpreter]: Reachable states at location L26-4 satisfy 73#(and (not (< main_~i~1 40)) (<= 40 main_~i~1)) [2019-10-13 23:20:57,280 INFO L193 IcfgInterpreter]: Reachable states at location L33 satisfy 601#(exists ((v_prenex_2 Int) (v_prenex_1 Int) (v_sep_~ret~0_BEFORE_RETURN_2 Int) (v_sep_~ret~0_BEFORE_RETURN_1 Int)) (or (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (= main_~ret~1 (+ (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) (- 4294967296))) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~ret~1 (+ (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647)) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~ret~1 (mod v_prenex_1 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_prenex_1 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~ret~1 (mod v_prenex_2 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_prenex_2 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))))) [2019-10-13 23:20:57,281 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 666#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:20:57,281 INFO L193 IcfgInterpreter]: Reachable states at location L26-3 satisfy 68#true [2019-10-13 23:20:57,281 INFO L193 IcfgInterpreter]: Reachable states at location L7-3 satisfy 657#(<= 0 sep_~i~0) [2019-10-13 23:20:57,282 INFO L193 IcfgInterpreter]: Reachable states at location sepENTRY satisfy 610#true [2019-10-13 23:20:57,282 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:20:57,282 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:20:57,283 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 671#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:20:57,283 INFO L193 IcfgInterpreter]: Reachable states at location L39-1 satisfy 488#true [2019-10-13 23:20:57,283 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:20:57,284 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 531#(and (<= 39 main_~i~2) (not (< main_~i~2 39)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) [2019-10-13 23:20:57,284 INFO L193 IcfgInterpreter]: Reachable states at location sepEXIT satisfy 662#(and (<= 40 sep_~i~0) (= |sep_#res| (ite (<= (mod sep_~ret~0 4294967296) 2147483647) (mod sep_~ret~0 4294967296) (+ (mod sep_~ret~0 4294967296) (- 4294967296)))) (<= 0 sep_~i~0) (not (< sep_~i~0 40))) [2019-10-13 23:20:57,285 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 243#(or (and (not (= main_~ret~1 main_~ret2~0)) (exists ((v_prenex_29 Int) (v_prenex_30 Int) (v_sep_~ret~0_BEFORE_RETURN_6 Int) (v_sep_~ret~0_BEFORE_RETURN_5 Int)) (or (and (<= (mod v_prenex_29 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (= (mod v_prenex_29 4294967296) main_~ret5~0) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) (- 4294967296)) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (+ (mod v_prenex_30 4294967296) (- 4294967296)) main_~ret5~0) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_prenex_30 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= main_~ret5~0 (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156))))))) (and (exists ((v_prenex_29 Int) (v_prenex_30 Int) (v_sep_~ret~0_BEFORE_RETURN_6 Int) (v_sep_~ret~0_BEFORE_RETURN_5 Int)) (or (and (<= (mod v_prenex_29 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (= (mod v_prenex_29 4294967296) main_~ret5~0) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_5 4294967296) (- 4294967296)) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (+ (mod v_prenex_30 4294967296) (- 4294967296)) main_~ret5~0) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_prenex_30 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= main_~ret5~0 (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_6 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))) (not (= main_~ret~1 main_~ret5~0)))) [2019-10-13 23:20:57,285 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 129#(or (exists ((v_prenex_2 Int) (v_sep_~ret~0_BEFORE_RETURN_2 Int)) (or (and (not (< main_~i~1 40)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) (- 4294967296)) |main_#t~ret6|) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_2 4294967296) 2147483647))) (and (not (< main_~i~1 40)) (= (mod v_prenex_2 4294967296) |main_#t~ret6|) (<= (mod v_prenex_2 4294967296) 2147483647)))) (exists ((v_prenex_1 Int) (v_sep_~ret~0_BEFORE_RETURN_1 Int)) (or (and (not (< main_~i~1 40)) (= (mod v_prenex_1 4294967296) |main_#t~ret6|) (<= (mod v_prenex_1 4294967296) 2147483647)) (and (not (< main_~i~1 40)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) 2147483647)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_1 4294967296) (- 4294967296)) |main_#t~ret6|))))) [2019-10-13 23:20:57,285 INFO L193 IcfgInterpreter]: Reachable states at location L41 satisfy 433#true [2019-10-13 23:20:57,286 INFO L193 IcfgInterpreter]: Reachable states at location L42 satisfy 322#true [2019-10-13 23:20:57,286 INFO L193 IcfgInterpreter]: Reachable states at location L33-1 satisfy 596#true [2019-10-13 23:20:57,286 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 569#true [2019-10-13 23:20:57,654 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:20:57,655 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-13 23:20:57,655 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626701188] [2019-10-13 23:20:57,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 23:20:57,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 23:20:57,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2019-10-13 23:20:57,658 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 18 states. [2019-10-13 23:21:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:21:02,409 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-10-13 23:21:02,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 23:21:02,410 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-10-13 23:21:02,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:21:02,411 INFO L225 Difference]: With dead ends: 40 [2019-10-13 23:21:02,411 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 23:21:02,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=133, Invalid=736, Unknown=1, NotChecked=0, Total=870 [2019-10-13 23:21:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 23:21:02,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 23:21:02,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 23:21:02,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-10-13 23:21:02,422 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 29 [2019-10-13 23:21:02,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:21:02,422 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-10-13 23:21:02,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 23:21:02,423 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-10-13 23:21:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 23:21:02,424 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:21:02,424 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:21:02,628 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:02,628 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:21:02,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:21:02,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1961836647, now seen corresponding path program 2 times [2019-10-13 23:21:02,629 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:21:02,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770954864] [2019-10-13 23:21:02,629 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:02,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:02,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:21:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:02,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:21:02,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770954864] [2019-10-13 23:21:02,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972776293] [2019-10-13 23:21:02,774 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:02,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 23:21:02,860 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:21:02,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:21:02,867 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:21:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:21:02,889 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:21:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-13 23:21:02,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141198392] [2019-10-13 23:21:02,931 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:21:02,931 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:21:02,932 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:21:02,932 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:21:02,932 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:21:02,959 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 23:21:04,432 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-13 23:21:04,492 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 23:21:04,496 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:21:04,496 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:21:04,496 INFO L193 IcfgInterpreter]: Reachable states at location L26-4 satisfy 73#(and (not (< main_~i~1 40)) (<= 40 main_~i~1)) [2019-10-13 23:21:04,497 INFO L193 IcfgInterpreter]: Reachable states at location L33 satisfy 601#(exists ((v_prenex_196 Int) (v_sep_~ret~0_BEFORE_RETURN_28 Int) (v_sep_~ret~0_BEFORE_RETURN_27 Int) (v_prenex_195 Int)) (or (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (= (mod v_prenex_195 4294967296) main_~ret~1) (<= (mod v_prenex_195 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (= (+ (mod v_prenex_196 4294967296) (- 4294967296)) main_~ret~1) (not (<= (mod v_prenex_196 4294967296) 2147483647)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (mod v_sep_~ret~0_BEFORE_RETURN_28 4294967296) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_sep_~ret~0_BEFORE_RETURN_28 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_27 4294967296) 2147483647)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_27 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= 0 (+ main_~ret~1 2147483648))))) [2019-10-13 23:21:04,497 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 666#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:21:04,497 INFO L193 IcfgInterpreter]: Reachable states at location L26-3 satisfy 68#true [2019-10-13 23:21:04,497 INFO L193 IcfgInterpreter]: Reachable states at location L7-3 satisfy 657#(<= 0 sep_~i~0) [2019-10-13 23:21:04,497 INFO L193 IcfgInterpreter]: Reachable states at location sepENTRY satisfy 610#true [2019-10-13 23:21:04,498 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:04,498 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:04,498 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 671#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:04,498 INFO L193 IcfgInterpreter]: Reachable states at location L39-1 satisfy 488#true [2019-10-13 23:21:04,498 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:21:04,499 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 531#(and (<= 39 main_~i~2) (not (< main_~i~2 39)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) [2019-10-13 23:21:04,499 INFO L193 IcfgInterpreter]: Reachable states at location sepEXIT satisfy 662#(and (<= 40 sep_~i~0) (= |sep_#res| (ite (<= (mod sep_~ret~0 4294967296) 2147483647) (mod sep_~ret~0 4294967296) (+ (mod sep_~ret~0 4294967296) (- 4294967296)))) (<= 0 sep_~i~0) (not (< sep_~i~0 40))) [2019-10-13 23:21:04,499 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 243#(or (and (exists ((v_sep_~ret~0_BEFORE_RETURN_31 Int) (v_prenex_224 Int) (v_sep_~ret~0_BEFORE_RETURN_32 Int) (v_prenex_223 Int)) (or (and (<= main_~ret5~0 2147483647) (= (mod v_sep_~ret~0_BEFORE_RETURN_31 4294967296) main_~ret5~0) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_31 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_prenex_223 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~ret5~0 (+ (mod v_prenex_223 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_prenex_224 4294967296) 2147483647) (= main_~ret5~0 (mod v_prenex_224 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_32 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_32 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))) (not (= main_~ret~1 main_~ret5~0))) (and (not (= main_~ret~1 main_~ret2~0)) (exists ((v_sep_~ret~0_BEFORE_RETURN_31 Int) (v_prenex_224 Int) (v_sep_~ret~0_BEFORE_RETURN_32 Int) (v_prenex_223 Int)) (or (and (<= main_~ret5~0 2147483647) (= (mod v_sep_~ret~0_BEFORE_RETURN_31 4294967296) main_~ret5~0) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_31 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_prenex_223 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~ret5~0 (+ (mod v_prenex_223 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_prenex_224 4294967296) 2147483647) (= main_~ret5~0 (mod v_prenex_224 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_32 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_32 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))))) [2019-10-13 23:21:04,499 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 129#(or (exists ((v_sep_~ret~0_BEFORE_RETURN_28 Int) (v_prenex_196 Int)) (or (and (not (< main_~i~1 40)) (= (mod v_sep_~ret~0_BEFORE_RETURN_28 4294967296) |main_#t~ret6|) (<= (mod v_sep_~ret~0_BEFORE_RETURN_28 4294967296) 2147483647)) (and (not (<= (mod v_prenex_196 4294967296) 2147483647)) (not (< main_~i~1 40)) (= (+ (mod v_prenex_196 4294967296) (- 4294967296)) |main_#t~ret6|)))) (exists ((v_sep_~ret~0_BEFORE_RETURN_27 Int) (v_prenex_195 Int)) (or (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_27 4294967296) (- 4294967296)) |main_#t~ret6|) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_27 4294967296) 2147483647)) (not (< main_~i~1 40))) (and (= (mod v_prenex_195 4294967296) |main_#t~ret6|) (not (< main_~i~1 40)) (<= (mod v_prenex_195 4294967296) 2147483647))))) [2019-10-13 23:21:04,500 INFO L193 IcfgInterpreter]: Reachable states at location L41 satisfy 433#true [2019-10-13 23:21:04,500 INFO L193 IcfgInterpreter]: Reachable states at location L42 satisfy 322#true [2019-10-13 23:21:04,500 INFO L193 IcfgInterpreter]: Reachable states at location L33-1 satisfy 596#true [2019-10-13 23:21:04,500 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 569#true [2019-10-13 23:21:04,891 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:21:04,891 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4, 11] total 21 [2019-10-13 23:21:04,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576308645] [2019-10-13 23:21:04,892 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 23:21:04,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:21:04,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 23:21:04,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2019-10-13 23:21:04,893 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 22 states. [2019-10-13 23:21:07,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:21:07,873 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2019-10-13 23:21:07,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 23:21:07,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2019-10-13 23:21:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:21:07,874 INFO L225 Difference]: With dead ends: 44 [2019-10-13 23:21:07,874 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 23:21:07,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 23:21:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 23:21:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 23:21:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 23:21:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-13 23:21:07,884 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 32 [2019-10-13 23:21:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:21:07,884 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-13 23:21:07,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 23:21:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-13 23:21:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 23:21:07,886 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:21:07,886 INFO L380 BasicCegarLoop]: trace histogram [12, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:21:08,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:08,092 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:21:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:21:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1603069542, now seen corresponding path program 3 times [2019-10-13 23:21:08,093 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:21:08,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339280963] [2019-10-13 23:21:08,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:08,094 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:08,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:21:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 23:21:08,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339280963] [2019-10-13 23:21:08,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289970717] [2019-10-13 23:21:08,231 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:08,347 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 23:21:08,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:21:08,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 23:21:08,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:21:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 23:21:08,372 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:21:08,451 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 23:21:08,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [684615299] [2019-10-13 23:21:08,453 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:21:08,455 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:21:08,456 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:21:08,456 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:21:08,456 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:21:08,477 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 23:21:09,809 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-13 23:21:09,845 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 23:21:09,848 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:21:09,848 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:21:09,848 INFO L193 IcfgInterpreter]: Reachable states at location L26-4 satisfy 73#(and (not (< main_~i~1 40)) (<= 40 main_~i~1)) [2019-10-13 23:21:09,848 INFO L193 IcfgInterpreter]: Reachable states at location L33 satisfy 601#(exists ((v_sep_~ret~0_BEFORE_RETURN_53 Int) (v_prenex_389 Int) (v_sep_~ret~0_BEFORE_RETURN_54 Int) (v_prenex_390 Int)) (or (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (mod v_sep_~ret~0_BEFORE_RETURN_54 4294967296) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_sep_~ret~0_BEFORE_RETURN_54 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (mod v_prenex_389 4294967296) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_prenex_389 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (+ (mod v_prenex_390 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (not (<= (mod v_prenex_390 4294967296) 2147483647)) (<= 0 (+ main_~ret~1 2147483648))) (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_53 4294967296) (- 4294967296)) main_~ret~1) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_53 4294967296) 2147483647)) (<= 0 (+ main_~ret~1 2147483648))))) [2019-10-13 23:21:09,849 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 666#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:21:09,849 INFO L193 IcfgInterpreter]: Reachable states at location L26-3 satisfy 68#true [2019-10-13 23:21:09,849 INFO L193 IcfgInterpreter]: Reachable states at location L7-3 satisfy 657#(<= 0 sep_~i~0) [2019-10-13 23:21:09,849 INFO L193 IcfgInterpreter]: Reachable states at location sepENTRY satisfy 610#true [2019-10-13 23:21:09,849 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:09,850 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:09,850 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 671#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:09,850 INFO L193 IcfgInterpreter]: Reachable states at location L39-1 satisfy 488#true [2019-10-13 23:21:09,850 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:21:09,850 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 531#(and (<= 39 main_~i~2) (not (< main_~i~2 39)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) [2019-10-13 23:21:09,851 INFO L193 IcfgInterpreter]: Reachable states at location sepEXIT satisfy 662#(and (<= 40 sep_~i~0) (= |sep_#res| (ite (<= (mod sep_~ret~0 4294967296) 2147483647) (mod sep_~ret~0 4294967296) (+ (mod sep_~ret~0 4294967296) (- 4294967296)))) (<= 0 sep_~i~0) (not (< sep_~i~0 40))) [2019-10-13 23:21:09,851 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 243#(or (and (exists ((v_sep_~ret~0_BEFORE_RETURN_57 Int) (v_prenex_417 Int) (v_prenex_418 Int) (v_sep_~ret~0_BEFORE_RETURN_58 Int)) (or (and (<= main_~ret5~0 2147483647) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_57 4294967296) (- 4294967296)) main_~ret5~0) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_57 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (mod v_prenex_417 4294967296) main_~ret5~0) (<= (mod v_prenex_417 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_prenex_418 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_prenex_418 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (= main_~ret5~0 (mod v_sep_~ret~0_BEFORE_RETURN_58 4294967296)) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_58 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))) (not (= main_~ret~1 main_~ret5~0))) (and (exists ((v_sep_~ret~0_BEFORE_RETURN_57 Int) (v_prenex_417 Int) (v_prenex_418 Int) (v_sep_~ret~0_BEFORE_RETURN_58 Int)) (or (and (<= main_~ret5~0 2147483647) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_57 4294967296) (- 4294967296)) main_~ret5~0) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_57 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (mod v_prenex_417 4294967296) main_~ret5~0) (<= (mod v_prenex_417 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_prenex_418 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_prenex_418 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (= main_~ret5~0 (mod v_sep_~ret~0_BEFORE_RETURN_58 4294967296)) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_58 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))) (not (= main_~ret~1 main_~ret2~0)))) [2019-10-13 23:21:09,851 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 129#(or (exists ((v_sep_~ret~0_BEFORE_RETURN_54 Int) (v_prenex_390 Int)) (or (and (not (< main_~i~1 40)) (not (<= (mod v_prenex_390 4294967296) 2147483647)) (= |main_#t~ret6| (+ (mod v_prenex_390 4294967296) (- 4294967296)))) (and (= (mod v_sep_~ret~0_BEFORE_RETURN_54 4294967296) |main_#t~ret6|) (not (< main_~i~1 40)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_54 4294967296) 2147483647)))) (exists ((v_sep_~ret~0_BEFORE_RETURN_53 Int) (v_prenex_389 Int)) (or (and (not (< main_~i~1 40)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_53 4294967296) 2147483647)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_53 4294967296) (- 4294967296)) |main_#t~ret6|)) (and (not (< main_~i~1 40)) (<= (mod v_prenex_389 4294967296) 2147483647) (= (mod v_prenex_389 4294967296) |main_#t~ret6|))))) [2019-10-13 23:21:09,851 INFO L193 IcfgInterpreter]: Reachable states at location L41 satisfy 433#true [2019-10-13 23:21:09,852 INFO L193 IcfgInterpreter]: Reachable states at location L42 satisfy 322#true [2019-10-13 23:21:09,852 INFO L193 IcfgInterpreter]: Reachable states at location L33-1 satisfy 596#true [2019-10-13 23:21:09,852 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 569#true [2019-10-13 23:21:10,175 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:21:10,176 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 11] total 25 [2019-10-13 23:21:10,176 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527054405] [2019-10-13 23:21:10,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 23:21:10,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:21:10,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 23:21:10,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2019-10-13 23:21:10,179 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 26 states. [2019-10-13 23:21:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:21:11,117 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2019-10-13 23:21:11,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 23:21:11,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 42 [2019-10-13 23:21:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:21:11,118 INFO L225 Difference]: With dead ends: 54 [2019-10-13 23:21:11,119 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 23:21:11,120 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=369, Invalid=1701, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 23:21:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 23:21:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-13 23:21:11,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 23:21:11,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-10-13 23:21:11,127 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 42 [2019-10-13 23:21:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:21:11,127 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-10-13 23:21:11,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 23:21:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-10-13 23:21:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 23:21:11,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:21:11,129 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:21:11,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:11,333 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:21:11,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:21:11,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1700782945, now seen corresponding path program 4 times [2019-10-13 23:21:11,334 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:21:11,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095611569] [2019-10-13 23:21:11,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:11,335 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:11,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:21:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 23:21:11,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095611569] [2019-10-13 23:21:11,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888087587] [2019-10-13 23:21:11,631 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:11,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 23:21:11,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:21:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 23:21:11,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:21:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 23:21:12,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148285402] [2019-10-13 23:21:12,111 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:21:12,111 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:21:12,112 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:21:12,112 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:21:12,112 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:21:12,132 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 23:21:13,531 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-13 23:21:13,561 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 23:21:13,565 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:21:13,565 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:21:13,565 INFO L193 IcfgInterpreter]: Reachable states at location L26-4 satisfy 73#(and (not (< main_~i~1 40)) (<= 40 main_~i~1)) [2019-10-13 23:21:13,566 INFO L193 IcfgInterpreter]: Reachable states at location L33 satisfy 601#(or (exists ((v_prenex_583 Int) (v_prenex_584 Int) (v_sep_~ret~0_BEFORE_RETURN_80 Int) (v_sep_~ret~0_BEFORE_RETURN_79 Int)) (or (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_80 4294967296) (- 4294967296)) main_~ret~1) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_80 4294967296) 2147483647)) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (+ (mod v_prenex_583 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (not (<= (mod v_prenex_583 4294967296) 2147483647)) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (mod v_prenex_584 4294967296) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_prenex_584 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_sep_~ret~0_BEFORE_RETURN_79 4294967296) 2147483647) (= (mod v_sep_~ret~0_BEFORE_RETURN_79 4294967296) main_~ret~1) (<= 0 (+ main_~ret~1 2147483648))))) (exists ((v_prenex_583 Int) (v_prenex_584 Int) (v_sep_~ret~0_BEFORE_RETURN_80 Int) (v_sep_~ret~0_BEFORE_RETURN_79 Int)) (or (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_80 4294967296) (- 4294967296)) main_~ret~1) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_80 4294967296) 2147483647)) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (+ (mod v_prenex_583 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (not (<= (mod v_prenex_583 4294967296) 2147483647)) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (mod v_prenex_584 4294967296) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_prenex_584 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (= (mod v_sep_~ret~0_BEFORE_RETURN_79 4294967296) main_~ret~1) (<= (mod v_sep_~ret~0_BEFORE_RETURN_79 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648)))))) [2019-10-13 23:21:13,566 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 666#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:21:13,566 INFO L193 IcfgInterpreter]: Reachable states at location L26-3 satisfy 68#true [2019-10-13 23:21:13,566 INFO L193 IcfgInterpreter]: Reachable states at location L7-3 satisfy 657#(<= 0 sep_~i~0) [2019-10-13 23:21:13,566 INFO L193 IcfgInterpreter]: Reachable states at location sepENTRY satisfy 610#true [2019-10-13 23:21:13,567 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:13,567 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:13,567 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 671#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:13,567 INFO L193 IcfgInterpreter]: Reachable states at location L39-1 satisfy 488#true [2019-10-13 23:21:13,567 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:21:13,567 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 531#(and (<= 39 main_~i~2) (not (< main_~i~2 39)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) [2019-10-13 23:21:13,568 INFO L193 IcfgInterpreter]: Reachable states at location sepEXIT satisfy 662#(and (<= 40 sep_~i~0) (= |sep_#res| (ite (<= (mod sep_~ret~0 4294967296) 2147483647) (mod sep_~ret~0 4294967296) (+ (mod sep_~ret~0 4294967296) (- 4294967296)))) (<= 0 sep_~i~0) (not (< sep_~i~0 40))) [2019-10-13 23:21:13,568 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 243#(or (and (not (= main_~ret~1 main_~ret5~0)) (exists ((v_prenex_611 Int) (v_prenex_612 Int) (v_sep_~ret~0_BEFORE_RETURN_84 Int) (v_sep_~ret~0_BEFORE_RETURN_83 Int)) (or (and (<= main_~ret5~0 2147483647) (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_83 4294967296) (- 4294967296))) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_83 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (+ (mod v_prenex_612 4294967296) (- 4294967296)) main_~ret5~0) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_prenex_612 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= (mod v_prenex_611 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~ret5~0 (mod v_prenex_611 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (<= (mod v_sep_~ret~0_BEFORE_RETURN_84 4294967296) 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_sep_~ret~0_BEFORE_RETURN_84 4294967296) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156))))))) (and (not (= main_~ret~1 main_~ret2~0)) (exists ((v_prenex_611 Int) (v_prenex_612 Int) (v_sep_~ret~0_BEFORE_RETURN_84 Int) (v_sep_~ret~0_BEFORE_RETURN_83 Int)) (or (and (<= main_~ret5~0 2147483647) (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_83 4294967296) (- 4294967296))) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_83 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (+ (mod v_prenex_612 4294967296) (- 4294967296)) main_~ret5~0) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (not (<= (mod v_prenex_612 4294967296) 2147483647)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= (mod v_prenex_611 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~ret5~0 (mod v_prenex_611 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= main_~ret5~0 2147483647) (<= (mod v_sep_~ret~0_BEFORE_RETURN_84 4294967296) 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_sep_~ret~0_BEFORE_RETURN_84 4294967296) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))))) [2019-10-13 23:21:13,568 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 129#(or (exists ((v_prenex_583 Int) (v_sep_~ret~0_BEFORE_RETURN_79 Int)) (or (and (= (mod v_sep_~ret~0_BEFORE_RETURN_79 4294967296) |main_#t~ret6|) (not (< main_~i~1 40)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_79 4294967296) 2147483647)) (and (= (+ (mod v_prenex_583 4294967296) (- 4294967296)) |main_#t~ret6|) (not (< main_~i~1 40)) (not (<= (mod v_prenex_583 4294967296) 2147483647))))) (exists ((v_prenex_584 Int) (v_sep_~ret~0_BEFORE_RETURN_80 Int)) (or (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_80 4294967296) (- 4294967296)) |main_#t~ret6|) (not (< main_~i~1 40)) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_80 4294967296) 2147483647))) (and (not (< main_~i~1 40)) (= (mod v_prenex_584 4294967296) |main_#t~ret6|) (<= (mod v_prenex_584 4294967296) 2147483647))))) [2019-10-13 23:21:13,568 INFO L193 IcfgInterpreter]: Reachable states at location L41 satisfy 433#true [2019-10-13 23:21:13,569 INFO L193 IcfgInterpreter]: Reachable states at location L42 satisfy 322#true [2019-10-13 23:21:13,569 INFO L193 IcfgInterpreter]: Reachable states at location L33-1 satisfy 596#true [2019-10-13 23:21:13,569 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 569#true [2019-10-13 23:21:13,952 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:21:13,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 11] total 39 [2019-10-13 23:21:13,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564008957] [2019-10-13 23:21:13,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 23:21:13,955 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:21:13,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 23:21:13,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=1125, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 23:21:13,957 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 40 states. [2019-10-13 23:21:15,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:21:15,463 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2019-10-13 23:21:15,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-13 23:21:15,464 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 49 [2019-10-13 23:21:15,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:21:15,465 INFO L225 Difference]: With dead ends: 68 [2019-10-13 23:21:15,466 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 23:21:15,469 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1244, Invalid=4158, Unknown=0, NotChecked=0, Total=5402 [2019-10-13 23:21:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 23:21:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-13 23:21:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 23:21:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2019-10-13 23:21:15,477 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 49 [2019-10-13 23:21:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:21:15,478 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2019-10-13 23:21:15,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 23:21:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2019-10-13 23:21:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 23:21:15,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:21:15,480 INFO L380 BasicCegarLoop]: trace histogram [26, 12, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:21:15,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:15,686 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:21:15,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:21:15,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1773432895, now seen corresponding path program 5 times [2019-10-13 23:21:15,687 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:21:15,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449667117] [2019-10-13 23:21:15,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:15,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:15,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:21:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 23:21:16,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449667117] [2019-10-13 23:21:16,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760890191] [2019-10-13 23:21:16,158 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:16,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 23:21:16,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:21:16,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 23:21:16,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:21:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-10-13 23:21:16,369 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:21:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2019-10-13 23:21:16,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [879597454] [2019-10-13 23:21:16,445 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:21:16,446 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:21:16,446 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:21:16,447 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:21:16,448 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:21:16,472 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 23:21:17,805 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-13 23:21:17,841 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 23:21:17,844 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:21:17,844 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:21:17,844 INFO L193 IcfgInterpreter]: Reachable states at location L26-4 satisfy 73#(and (not (< main_~i~1 40)) (<= 40 main_~i~1)) [2019-10-13 23:21:17,844 INFO L193 IcfgInterpreter]: Reachable states at location L33 satisfy 601#(exists ((v_prenex_777 Int) (v_sep_~ret~0_BEFORE_RETURN_105 Int) (v_sep_~ret~0_BEFORE_RETURN_106 Int) (v_prenex_778 Int)) (or (and (not (<= (mod v_prenex_777 4294967296) 2147483647)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~ret~1 (+ (mod v_prenex_777 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= 0 (+ main_~ret~1 2147483648))) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_106 4294967296) 2147483647)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (= main_~ret~1 (+ (mod v_sep_~ret~0_BEFORE_RETURN_106 4294967296) (- 4294967296))) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (= main_~ret~1 (mod v_prenex_778 4294967296)) (<= (mod v_prenex_778 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_105 4294967296) 2147483647) (= main_~ret~1 (mod v_sep_~ret~0_BEFORE_RETURN_105 4294967296)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= 0 (+ main_~ret~1 2147483648))))) [2019-10-13 23:21:17,845 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 666#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:21:17,845 INFO L193 IcfgInterpreter]: Reachable states at location L26-3 satisfy 68#true [2019-10-13 23:21:17,845 INFO L193 IcfgInterpreter]: Reachable states at location L7-3 satisfy 657#(<= 0 sep_~i~0) [2019-10-13 23:21:17,845 INFO L193 IcfgInterpreter]: Reachable states at location sepENTRY satisfy 610#true [2019-10-13 23:21:17,845 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:17,845 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0))) [2019-10-13 23:21:17,846 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 671#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:17,846 INFO L193 IcfgInterpreter]: Reachable states at location L39-1 satisfy 488#true [2019-10-13 23:21:17,846 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:21:17,846 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 531#(and (<= 39 main_~i~2) (not (< main_~i~2 39)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) [2019-10-13 23:21:17,846 INFO L193 IcfgInterpreter]: Reachable states at location sepEXIT satisfy 662#(and (<= 40 sep_~i~0) (= |sep_#res| (ite (<= (mod sep_~ret~0 4294967296) 2147483647) (mod sep_~ret~0 4294967296) (+ (mod sep_~ret~0 4294967296) (- 4294967296)))) (<= 0 sep_~i~0) (not (< sep_~i~0 40))) [2019-10-13 23:21:17,847 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 243#(or (and (not (= main_~ret~1 main_~ret2~0)) (exists ((v_sep_~ret~0_BEFORE_RETURN_110 Int) (v_prenex_806 Int) (v_prenex_805 Int) (v_sep_~ret~0_BEFORE_RETURN_109 Int)) (or (and (= main_~ret5~0 (mod v_prenex_805 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_prenex_805 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_110 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_110 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= main_~ret5~0 (mod v_prenex_806 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_prenex_806 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_109 4294967296) (- 4294967296)) main_~ret5~0) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_109 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156))))))) (and (exists ((v_sep_~ret~0_BEFORE_RETURN_110 Int) (v_prenex_806 Int) (v_prenex_805 Int) (v_sep_~ret~0_BEFORE_RETURN_109 Int)) (or (and (= main_~ret5~0 (mod v_prenex_805 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_prenex_805 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_110 4294967296) 2147483647)) (= main_~ret5~0 (+ (mod v_sep_~ret~0_BEFORE_RETURN_110 4294967296) (- 4294967296))) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= main_~ret5~0 (mod v_prenex_806 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (<= (mod v_prenex_806 4294967296) 2147483647) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_109 4294967296) (- 4294967296)) main_~ret5~0) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_109 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))) (not (= main_~ret~1 main_~ret5~0)))) [2019-10-13 23:21:17,847 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 129#(or (exists ((v_prenex_777 Int) (v_sep_~ret~0_BEFORE_RETURN_105 Int)) (or (and (not (< main_~i~1 40)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_105 4294967296) 2147483647) (= |main_#t~ret6| (mod v_sep_~ret~0_BEFORE_RETURN_105 4294967296))) (and (not (<= (mod v_prenex_777 4294967296) 2147483647)) (not (< main_~i~1 40)) (= (+ (mod v_prenex_777 4294967296) (- 4294967296)) |main_#t~ret6|)))) (exists ((v_sep_~ret~0_BEFORE_RETURN_106 Int) (v_prenex_778 Int)) (or (and (not (< main_~i~1 40)) (= |main_#t~ret6| (mod v_prenex_778 4294967296)) (<= (mod v_prenex_778 4294967296) 2147483647)) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_106 4294967296) 2147483647)) (not (< main_~i~1 40)) (= |main_#t~ret6| (+ (mod v_sep_~ret~0_BEFORE_RETURN_106 4294967296) (- 4294967296))))))) [2019-10-13 23:21:17,850 INFO L193 IcfgInterpreter]: Reachable states at location L41 satisfy 433#true [2019-10-13 23:21:17,850 INFO L193 IcfgInterpreter]: Reachable states at location L42 satisfy 322#true [2019-10-13 23:21:17,850 INFO L193 IcfgInterpreter]: Reachable states at location L33-1 satisfy 596#true [2019-10-13 23:21:17,850 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 569#true [2019-10-13 23:21:18,430 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:21:18,430 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 4, 4, 11] total 43 [2019-10-13 23:21:18,431 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289898799] [2019-10-13 23:21:18,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-13 23:21:18,432 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:21:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-13 23:21:18,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 23:21:18,433 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 44 states. [2019-10-13 23:21:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:21:22,738 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2019-10-13 23:21:22,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-13 23:21:22,738 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 63 [2019-10-13 23:21:22,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:21:22,739 INFO L225 Difference]: With dead ends: 72 [2019-10-13 23:21:22,740 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 23:21:22,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1349, Invalid=5457, Unknown=0, NotChecked=0, Total=6806 [2019-10-13 23:21:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 23:21:22,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2019-10-13 23:21:22,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 23:21:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2019-10-13 23:21:22,752 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 63 [2019-10-13 23:21:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:21:22,752 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2019-10-13 23:21:22,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-13 23:21:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2019-10-13 23:21:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 23:21:22,753 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:21:22,753 INFO L380 BasicCegarLoop]: trace histogram [27, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:21:22,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:22,962 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:21:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:21:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash -806625269, now seen corresponding path program 6 times [2019-10-13 23:21:22,963 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:21:22,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482794411] [2019-10-13 23:21:22,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:22,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:22,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:21:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:23,512 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 23:21:23,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482794411] [2019-10-13 23:21:23,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266996448] [2019-10-13 23:21:23,513 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:23,796 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 23:21:23,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:21:23,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 23:21:23,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:21:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 23:21:23,845 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:21:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 23:21:24,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1785764905] [2019-10-13 23:21:24,542 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-13 23:21:24,542 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:21:24,542 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:21:24,542 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:21:24,543 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:21:24,560 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 23:21:25,922 INFO L199 IcfgInterpreter]: Interpreting procedure sep with input of size 1 for LOIs [2019-10-13 23:21:25,949 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 23:21:25,952 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:21:25,952 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:21:25,952 INFO L193 IcfgInterpreter]: Reachable states at location L26-4 satisfy 73#(and (not (< main_~i~1 40)) (<= 40 main_~i~1)) [2019-10-13 23:21:25,953 INFO L193 IcfgInterpreter]: Reachable states at location L33 satisfy 601#(exists ((v_sep_~ret~0_BEFORE_RETURN_131 Int) (v_sep_~ret~0_BEFORE_RETURN_132 Int) (v_prenex_972 Int) (v_prenex_971 Int)) (or (and (= main_~ret~1 (mod v_prenex_972 4294967296)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_prenex_972 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))) (and (not (<= (mod v_prenex_971 4294967296) 2147483647)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~ret~1 (+ (mod v_prenex_971 4294967296) (- 4294967296))) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= 0 (+ main_~ret~1 2147483648))) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_132 4294967296) 2147483647)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_132 4294967296) (- 4294967296)) main_~ret~1) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= 0 (+ main_~ret~1 2147483648))) (and (= main_~ret~1 (mod v_sep_~ret~0_BEFORE_RETURN_131 4294967296)) (<= main_~ret~1 2147483647) (not (< main_~i~1 40)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 4))) (<= (mod v_sep_~ret~0_BEFORE_RETURN_131 4294967296) 2147483647) (<= 0 (+ main_~ret~1 2147483648))))) [2019-10-13 23:21:25,953 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 666#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 23:21:25,953 INFO L193 IcfgInterpreter]: Reachable states at location L26-3 satisfy 68#true [2019-10-13 23:21:25,953 INFO L193 IcfgInterpreter]: Reachable states at location L7-3 satisfy 657#(<= 0 sep_~i~0) [2019-10-13 23:21:25,953 INFO L193 IcfgInterpreter]: Reachable states at location sepENTRY satisfy 610#true [2019-10-13 23:21:25,953 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:25,954 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:25,954 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 671#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 23:21:25,954 INFO L193 IcfgInterpreter]: Reachable states at location L39-1 satisfy 488#true [2019-10-13 23:21:25,954 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:21:25,954 INFO L193 IcfgInterpreter]: Reachable states at location L39 satisfy 531#(and (<= 39 main_~i~2) (not (< main_~i~2 39)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) [2019-10-13 23:21:25,955 INFO L193 IcfgInterpreter]: Reachable states at location sepEXIT satisfy 662#(and (<= 40 sep_~i~0) (= |sep_#res| (ite (<= (mod sep_~ret~0 4294967296) 2147483647) (mod sep_~ret~0 4294967296) (+ (mod sep_~ret~0 4294967296) (- 4294967296)))) (<= 0 sep_~i~0) (not (< sep_~i~0 40))) [2019-10-13 23:21:25,955 INFO L193 IcfgInterpreter]: Reachable states at location mainErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 243#(or (and (exists ((v_sep_~ret~0_BEFORE_RETURN_135 Int) (v_sep_~ret~0_BEFORE_RETURN_136 Int) (v_prenex_1000 Int) (v_prenex_999 Int)) (or (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_136 4294967296) (- 4294967296)) main_~ret5~0) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_136 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= (mod v_sep_~ret~0_BEFORE_RETURN_135 4294967296) 2147483647) (= main_~ret5~0 (mod v_sep_~ret~0_BEFORE_RETURN_135 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_prenex_999 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (+ (mod v_prenex_999 4294967296) (- 4294967296)) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= (mod v_prenex_1000 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_prenex_1000 4294967296) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))) (not (= main_~ret~1 main_~ret5~0))) (and (exists ((v_sep_~ret~0_BEFORE_RETURN_135 Int) (v_sep_~ret~0_BEFORE_RETURN_136 Int) (v_prenex_1000 Int) (v_prenex_999 Int)) (or (and (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_136 4294967296) (- 4294967296)) main_~ret5~0) (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_136 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= (mod v_sep_~ret~0_BEFORE_RETURN_135 4294967296) 2147483647) (= main_~ret5~0 (mod v_sep_~ret~0_BEFORE_RETURN_135 4294967296)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (not (<= (mod v_prenex_999 4294967296) 2147483647)) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (+ (mod v_prenex_999 4294967296) (- 4294967296)) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))) (and (<= (mod v_prenex_1000 4294967296) 2147483647) (<= main_~ret5~0 2147483647) (not (< main_~i~2 39)) (<= 0 (+ main_~ret5~0 2147483648)) (= (mod v_prenex_1000 4294967296) main_~ret5~0) (= main_~temp~0 (select (select |#memory_int| |main_~#x~0.base|) (+ |main_~#x~0.offset| 156)))))) (not (= main_~ret~1 main_~ret2~0)))) [2019-10-13 23:21:25,955 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 129#(or (exists ((v_sep_~ret~0_BEFORE_RETURN_131 Int) (v_prenex_971 Int)) (or (and (= |main_#t~ret6| (mod v_sep_~ret~0_BEFORE_RETURN_131 4294967296)) (not (< main_~i~1 40)) (<= (mod v_sep_~ret~0_BEFORE_RETURN_131 4294967296) 2147483647)) (and (not (<= (mod v_prenex_971 4294967296) 2147483647)) (not (< main_~i~1 40)) (= (+ (mod v_prenex_971 4294967296) (- 4294967296)) |main_#t~ret6|)))) (exists ((v_sep_~ret~0_BEFORE_RETURN_132 Int) (v_prenex_972 Int)) (or (and (= (mod v_prenex_972 4294967296) |main_#t~ret6|) (not (< main_~i~1 40)) (<= (mod v_prenex_972 4294967296) 2147483647)) (and (not (<= (mod v_sep_~ret~0_BEFORE_RETURN_132 4294967296) 2147483647)) (not (< main_~i~1 40)) (= (+ (mod v_sep_~ret~0_BEFORE_RETURN_132 4294967296) (- 4294967296)) |main_#t~ret6|))))) [2019-10-13 23:21:25,955 INFO L193 IcfgInterpreter]: Reachable states at location L41 satisfy 433#true [2019-10-13 23:21:25,955 INFO L193 IcfgInterpreter]: Reachable states at location L42 satisfy 322#true [2019-10-13 23:21:25,956 INFO L193 IcfgInterpreter]: Reachable states at location L33-1 satisfy 596#true [2019-10-13 23:21:25,956 INFO L193 IcfgInterpreter]: Reachable states at location L35-3 satisfy 569#true [2019-10-13 23:21:26,439 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 23:21:26,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 11] total 53 [2019-10-13 23:21:26,440 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632042051] [2019-10-13 23:21:26,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-13 23:21:26,441 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:21:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-13 23:21:26,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=932, Invalid=1930, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 23:21:26,443 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 54 states. [2019-10-13 23:21:28,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:21:28,879 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2019-10-13 23:21:28,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-13 23:21:28,879 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 67 [2019-10-13 23:21:28,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:21:28,880 INFO L225 Difference]: With dead ends: 88 [2019-10-13 23:21:28,880 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 23:21:28,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 165 SyntacticMatches, 16 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2707, Invalid=7595, Unknown=0, NotChecked=0, Total=10302 [2019-10-13 23:21:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 23:21:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-10-13 23:21:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-10-13 23:21:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-10-13 23:21:28,902 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 67 [2019-10-13 23:21:28,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:21:28,904 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-10-13 23:21:28,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-13 23:21:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-10-13 23:21:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 23:21:28,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:21:28,914 INFO L380 BasicCegarLoop]: trace histogram [40, 12, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:21:29,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:29,116 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:21:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:21:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2020178544, now seen corresponding path program 7 times [2019-10-13 23:21:29,116 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:21:29,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696272275] [2019-10-13 23:21:29,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:29,117 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:21:29,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:21:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 26 proven. 36 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-13 23:21:29,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696272275] [2019-10-13 23:21:29,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26662040] [2019-10-13 23:21:29,234 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:21:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:21:29,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 23:21:29,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:21:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 52 proven. 10 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-13 23:21:29,498 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:21:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2019-10-13 23:21:29,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [751023577]