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 -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:14,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:14,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:14,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:14,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:14,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:14,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:14,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:14,349 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:14,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:14,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:14,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:14,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:14,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:14,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:14,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:14,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:14,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:14,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:14,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:14,375 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:14,378 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:14,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:14,382 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:14,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:14,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:14,392 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:14,392 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:14,393 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:14,394 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:14,394 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:14,395 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:14,395 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:14,396 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:14,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:14,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:14,399 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 [2019-10-14 23:16:14,433 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:14,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:14,435 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:14,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:14,436 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:14,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:14,436 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:14,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:14,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:14,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:14,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:14,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:14,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:14,438 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:14,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:14,439 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:14,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:14,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:14,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:14,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:14,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:14,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:14,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:14,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:14,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:14,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:14,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:14,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:14,442 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:14,746 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:14,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:14,763 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:14,764 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:14,765 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:14,766 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2019-10-14 23:16:14,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556f19e55/9b4a61ccf4664e4cb455be32f56c5049/FLAG4410c5ad3 [2019-10-14 23:16:15,252 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:15,253 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2019-10-14 23:16:15,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556f19e55/9b4a61ccf4664e4cb455be32f56c5049/FLAG4410c5ad3 [2019-10-14 23:16:15,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/556f19e55/9b4a61ccf4664e4cb455be32f56c5049 [2019-10-14 23:16:15,683 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:15,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:15,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:15,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:15,692 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:15,693 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:15" (1/1) ... [2019-10-14 23:16:15,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5427eb53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:15, skipping insertion in model container [2019-10-14 23:16:15,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:15" (1/1) ... [2019-10-14 23:16:15,704 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:15,722 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:15,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:15,975 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:16,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:16,131 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:16,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16 WrapperNode [2019-10-14 23:16:16,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:16,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:16,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:16,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:16,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (1/1) ... [2019-10-14 23:16:16,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (1/1) ... [2019-10-14 23:16:16,155 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (1/1) ... [2019-10-14 23:16:16,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (1/1) ... [2019-10-14 23:16:16,167 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (1/1) ... [2019-10-14 23:16:16,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (1/1) ... [2019-10-14 23:16:16,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (1/1) ... [2019-10-14 23:16:16,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:16,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:16,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:16,177 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:16,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (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 [2019-10-14 23:16:16,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:16,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:16,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:16,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:16:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2019-10-14 23:16:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:16,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:16,506 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:16,506 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:16:16,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:16 BoogieIcfgContainer [2019-10-14 23:16:16,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:16,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:16,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:16,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:16,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:15" (1/3) ... [2019-10-14 23:16:16,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4df022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:16, skipping insertion in model container [2019-10-14 23:16:16,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:16" (2/3) ... [2019-10-14 23:16:16,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4df022 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:16, skipping insertion in model container [2019-10-14 23:16:16,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:16" (3/3) ... [2019-10-14 23:16:16,516 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2019-10-14 23:16:16,526 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:16,536 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:16,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:16,588 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:16,589 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:16,589 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:16,589 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:16,589 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:16,589 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:16,590 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:16,590 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:16,610 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-14 23:16:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-14 23:16:16,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:16,620 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:16,622 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:16,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:16,628 INFO L82 PathProgramCache]: Analyzing trace with hash 242978043, now seen corresponding path program 1 times [2019-10-14 23:16:16,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:16,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013833097] [2019-10-14 23:16:16,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:16,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013833097] [2019-10-14 23:16:16,843 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:16,844 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:16,844 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005898380] [2019-10-14 23:16:16,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:16,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:16,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:16,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:16,864 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-10-14 23:16:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:16,958 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2019-10-14 23:16:16,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:16,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-10-14 23:16:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:16,970 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:16:16,971 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:16:16,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:16:17,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2019-10-14 23:16:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:16:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-14 23:16:17,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-10-14 23:16:17,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:17,012 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-14 23:16:17,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:17,012 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-14 23:16:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-10-14 23:16:17,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:17,013 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:17,013 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:17,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:17,014 INFO L82 PathProgramCache]: Analyzing trace with hash 242949213, now seen corresponding path program 1 times [2019-10-14 23:16:17,015 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:17,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225715103] [2019-10-14 23:16:17,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:17,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225715103] [2019-10-14 23:16:17,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:17,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:16:17,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943557919] [2019-10-14 23:16:17,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:17,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:17,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:17,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:17,177 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2019-10-14 23:16:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:17,289 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-10-14 23:16:17,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:17,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-10-14 23:16:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:17,291 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:16:17,291 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:16:17,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:16:17,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:16:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2019-10-14 23:16:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:16:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-14 23:16:17,299 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2019-10-14 23:16:17,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:17,300 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-14 23:16:17,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-14 23:16:17,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:16:17,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:17,301 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:17,301 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash 713101374, now seen corresponding path program 1 times [2019-10-14 23:16:17,302 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:17,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638448766] [2019-10-14 23:16:17,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:17,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638448766] [2019-10-14 23:16:17,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926957568] [2019-10-14 23:16:17,449 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 [2019-10-14 23:16:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:16:17,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:17,548 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:17,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2019-10-14 23:16:17,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397094550] [2019-10-14 23:16:17,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:17,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:17,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:17,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:17,550 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 4 states. [2019-10-14 23:16:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:17,611 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-10-14 23:16:17,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:17,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-14 23:16:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:17,613 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:16:17,613 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:16:17,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:16:17,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 17. [2019-10-14 23:16:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:16:17,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-14 23:16:17,622 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2019-10-14 23:16:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:17,623 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-14 23:16:17,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:17,623 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-14 23:16:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:16:17,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:17,625 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:17,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:17,829 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1111837415, now seen corresponding path program 1 times [2019-10-14 23:16:17,830 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:17,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118076792] [2019-10-14 23:16:17,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:17,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118076792] [2019-10-14 23:16:17,965 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557018328] [2019-10-14 23:16:17,965 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 [2019-10-14 23:16:18,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,018 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:16:18,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:18,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:18,042 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:18,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2019-10-14 23:16:18,043 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575780403] [2019-10-14 23:16:18,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:18,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:18,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:18,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:18,044 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 4 states. [2019-10-14 23:16:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:18,094 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-10-14 23:16:18,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:18,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 23:16:18,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:18,097 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:16:18,097 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:16:18,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:16:18,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:16:18,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2019-10-14 23:16:18,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:16:18,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-10-14 23:16:18,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2019-10-14 23:16:18,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:18,110 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-10-14 23:16:18,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:18,112 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-10-14 23:16:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:16:18,113 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:18,115 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:18,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,320 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:18,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1672606071, now seen corresponding path program 1 times [2019-10-14 23:16:18,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:18,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538021096] [2019-10-14 23:16:18,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:18,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538021096] [2019-10-14 23:16:18,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279702107] [2019-10-14 23:16:18,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 23:16:18,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:16:18,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:18,477 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:18,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:16:18,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673439215] [2019-10-14 23:16:18,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:18,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:18,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:18,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:18,479 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2019-10-14 23:16:18,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:18,554 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2019-10-14 23:16:18,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:18,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-14 23:16:18,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:18,556 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:16:18,556 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:16:18,556 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:18,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:16:18,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2019-10-14 23:16:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:16:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-14 23:16:18,562 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2019-10-14 23:16:18,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:18,562 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-14 23:16:18,562 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-14 23:16:18,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:16:18,563 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:18,563 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:18,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,773 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:18,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:18,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1758170709, now seen corresponding path program 2 times [2019-10-14 23:16:18,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:18,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916652746] [2019-10-14 23:16:18,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:18,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:18,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916652746] [2019-10-14 23:16:18,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66355488] [2019-10-14 23:16:18,914 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 23:16:18,952 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 23:16:18,953 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:18,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:16:18,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:16:18,973 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:18,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 23:16:18,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712413794] [2019-10-14 23:16:18,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:18,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:18,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:18,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:18,977 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2019-10-14 23:16:18,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:18,982 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-14 23:16:18,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:18,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-14 23:16:18,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:18,983 INFO L225 Difference]: With dead ends: 20 [2019-10-14 23:16:18,984 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:16:18,985 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:16:18,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:16:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:16:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:16:18,986 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-10-14 23:16:18,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:18,986 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:16:18,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:18,986 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:16:18,987 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:16:19,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:16:19,264 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:16:19,265 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#array~0.base| |old(~#array~0.base)|) (= |~#array~0.offset| |old(~#array~0.offset)|) (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#length)| |#length|)) [2019-10-14 23:16:19,265 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:19,265 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:19,266 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:16:19,266 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:16:19,266 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:16:19,266 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 21) no Hoare annotation was computed. [2019-10-14 23:16:19,266 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2019-10-14 23:16:19,266 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 21) no Hoare annotation was computed. [2019-10-14 23:16:19,267 INFO L443 ceAbstractionStarter]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2019-10-14 23:16:19,267 INFO L439 ceAbstractionStarter]: At program point L11-3(lines 11 13) the Hoare annotation is: (= main_~a~0 1) [2019-10-14 23:16:19,267 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 5 21) the Hoare annotation is: (= |#memory_int| |old(#memory_int)|) [2019-10-14 23:16:19,267 INFO L439 ceAbstractionStarter]: At program point L16(lines 6 21) the Hoare annotation is: false [2019-10-14 23:16:19,267 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2019-10-14 23:16:19,267 INFO L439 ceAbstractionStarter]: At program point L12-3(lines 12 13) the Hoare annotation is: (= main_~a~0 1) [2019-10-14 23:16:19,268 INFO L443 ceAbstractionStarter]: For program point L10-2(lines 10 13) no Hoare annotation was computed. [2019-10-14 23:16:19,268 INFO L439 ceAbstractionStarter]: At program point L10-3(lines 10 13) the Hoare annotation is: (= main_~a~0 1) [2019-10-14 23:16:19,268 INFO L443 ceAbstractionStarter]: For program point L10-4(lines 6 21) no Hoare annotation was computed. [2019-10-14 23:16:19,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:19 BoogieIcfgContainer [2019-10-14 23:16:19,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:19,291 INFO L168 Benchmark]: Toolchain (without parser) took 3601.72 ms. Allocated memory was 138.9 MB in the beginning and 235.9 MB in the end (delta: 97.0 MB). Free memory was 103.1 MB in the beginning and 104.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 95.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:19,295 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:16:19,297 INFO L168 Benchmark]: CACSL2BoogieTranslator took 444.01 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 163.7 MB in the end (delta: -60.8 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:19,298 INFO L168 Benchmark]: Boogie Preprocessor took 43.21 ms. Allocated memory is still 201.9 MB. Free memory was 163.7 MB in the beginning and 162.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:19,299 INFO L168 Benchmark]: RCFGBuilder took 331.87 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 147.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:19,300 INFO L168 Benchmark]: TraceAbstraction took 2775.57 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 146.3 MB in the beginning and 104.2 MB in the end (delta: 42.1 MB). Peak memory consumption was 76.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:19,314 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 122.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 444.01 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 102.9 MB in the beginning and 163.7 MB in the end (delta: -60.8 MB). Peak memory consumption was 27.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.21 ms. Allocated memory is still 201.9 MB. Free memory was 163.7 MB in the beginning and 162.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.87 ms. Allocated memory is still 201.9 MB. Free memory was 161.5 MB in the beginning and 147.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2775.57 ms. Allocated memory was 201.9 MB in the beginning and 235.9 MB in the end (delta: 34.1 MB). Free memory was 146.3 MB in the beginning and 104.2 MB in the end (delta: 42.1 MB). Peak memory consumption was 76.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 1 error locations. Result: SAFE, OverallTime: 2.6s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 73 SDslu, 78 SDs, 0 SdLazy, 111 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 49 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 15 NumberOfFragments, 37 HoareAnnotationTreeSize, 8 FomulaSimplifications, 172 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 19 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 144 NumberOfCodeBlocks, 134 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 134 ConstructedInterpolants, 0 QuantifiedInterpolants, 5233 SizeOfPredicates, 6 NumberOfNonLiveVariables, 278 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 10 InterpolantComputations, 5 PerfectInterpolantSequences, 16/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...