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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:06:25,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:06:25,144 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:06:25,157 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:06:25,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:06:25,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:06:25,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:06:25,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:06:25,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:06:25,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:06:25,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:06:25,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:06:25,166 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:06:25,167 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:06:25,168 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:06:25,170 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:06:25,171 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:06:25,172 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:06:25,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:06:25,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:06:25,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:06:25,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:06:25,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:06:25,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:06:25,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:06:25,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:06:25,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:06:25,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:06:25,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:06:25,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:06:25,186 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:06:25,187 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:06:25,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:06:25,188 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:06:25,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:06:25,190 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:06:25,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:06:25,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:06:25,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:06:25,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:06:25,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:06:25,193 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 21:06:25,208 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:06:25,208 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:06:25,210 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:06:25,210 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:06:25,210 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:06:25,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:06:25,211 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:06:25,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:06:25,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:06:25,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:06:25,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:06:25,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:06:25,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:06:25,212 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:06:25,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:06:25,212 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:06:25,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:06:25,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:06:25,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:06:25,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:06:25,213 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:06:25,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:06:25,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:06:25,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:06:25,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:06:25,214 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:06:25,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:06:25,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:06:25,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 21:06:25,513 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:06:25,528 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:06:25,532 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:06:25,533 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:06:25,534 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:06:25,534 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2019-10-13 21:06:25,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a86a760/b84bc8b8b75c45d3bac1157250e1bf43/FLAG7a966126d [2019-10-13 21:06:26,040 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:06:26,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2019-10-13 21:06:26,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a86a760/b84bc8b8b75c45d3bac1157250e1bf43/FLAG7a966126d [2019-10-13 21:06:26,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/50a86a760/b84bc8b8b75c45d3bac1157250e1bf43 [2019-10-13 21:06:26,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:06:26,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:06:26,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:26,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:06:26,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:06:26,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f1e481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26, skipping insertion in model container [2019-10-13 21:06:26,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,413 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:06:26,430 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:06:26,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:26,632 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:06:26,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:26,666 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:06:26,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26 WrapperNode [2019-10-13 21:06:26,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:26,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:06:26,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:06:26,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:06:26,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... [2019-10-13 21:06:26,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:06:26,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:06:26,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:06:26,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:06:26,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:06:26,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:06:26,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:06:26,862 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:06:26,863 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:06:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:06:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:06:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:06:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:06:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:06:26,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:06:26,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:06:27,038 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:06:27,039 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 21:06:27,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:27 BoogieIcfgContainer [2019-10-13 21:06:27,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:06:27,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:06:27,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:06:27,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:06:27,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:06:26" (1/3) ... [2019-10-13 21:06:27,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb9246c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:27, skipping insertion in model container [2019-10-13 21:06:27,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:26" (2/3) ... [2019-10-13 21:06:27,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb9246c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:27, skipping insertion in model container [2019-10-13 21:06:27,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:27" (3/3) ... [2019-10-13 21:06:27,049 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2019-10-13 21:06:27,059 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:06:27,068 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:06:27,081 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:06:27,113 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:06:27,113 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:06:27,114 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:06:27,114 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:06:27,115 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:06:27,115 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:06:27,115 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:06:27,115 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:06:27,139 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-13 21:06:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 21:06:27,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:27,148 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:27,150 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:27,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:27,158 INFO L82 PathProgramCache]: Analyzing trace with hash 728031169, now seen corresponding path program 1 times [2019-10-13 21:06:27,170 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:27,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110469340] [2019-10-13 21:06:27,171 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,171 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:27,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110469340] [2019-10-13 21:06:27,290 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:27,290 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 21:06:27,290 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923503946] [2019-10-13 21:06:27,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:06:27,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:27,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:06:27,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:06:27,308 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-10-13 21:06:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:27,328 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2019-10-13 21:06:27,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:06:27,330 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 21:06:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:27,338 INFO L225 Difference]: With dead ends: 37 [2019-10-13 21:06:27,338 INFO L226 Difference]: Without dead ends: 14 [2019-10-13 21:06:27,342 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:06:27,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-13 21:06:27,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-13 21:06:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-13 21:06:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2019-10-13 21:06:27,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2019-10-13 21:06:27,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:27,380 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2019-10-13 21:06:27,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:06:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2019-10-13 21:06:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 21:06:27,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:27,382 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:27,382 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:27,383 INFO L82 PathProgramCache]: Analyzing trace with hash 701249060, now seen corresponding path program 1 times [2019-10-13 21:06:27,383 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:27,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122530202] [2019-10-13 21:06:27,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:27,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122530202] [2019-10-13 21:06:27,450 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:27,450 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:06:27,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425067447] [2019-10-13 21:06:27,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:06:27,454 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:27,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:06:27,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:06:27,459 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2019-10-13 21:06:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:27,481 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-13 21:06:27,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:06:27,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-13 21:06:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:27,482 INFO L225 Difference]: With dead ends: 20 [2019-10-13 21:06:27,483 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 21:06:27,484 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:06:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 21:06:27,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 21:06:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 21:06:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-13 21:06:27,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2019-10-13 21:06:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:27,489 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-13 21:06:27,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:06:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-13 21:06:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 21:06:27,490 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:27,491 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:27,491 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1130211510, now seen corresponding path program 1 times [2019-10-13 21:06:27,492 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:27,492 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174485298] [2019-10-13 21:06:27,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:27,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174485298] [2019-10-13 21:06:27,534 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:27,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:06:27,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768896753] [2019-10-13 21:06:27,535 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:06:27,535 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:06:27,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:06:27,536 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-10-13 21:06:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:27,554 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-10-13 21:06:27,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:06:27,555 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 21:06:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:27,556 INFO L225 Difference]: With dead ends: 25 [2019-10-13 21:06:27,556 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 21:06:27,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:06:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 21:06:27,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 21:06:27,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 21:06:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-13 21:06:27,566 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 14 [2019-10-13 21:06:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:27,566 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-13 21:06:27,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:06:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-13 21:06:27,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 21:06:27,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:27,568 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:27,568 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1842576314, now seen corresponding path program 1 times [2019-10-13 21:06:27,569 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:27,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992213358] [2019-10-13 21:06:27,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:27,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:27,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:06:27,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992213358] [2019-10-13 21:06:27,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763540179] [2019-10-13 21:06:27,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:06:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:27,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:06:27,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:06:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:06:27,689 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:06:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:06:27,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [732110528] [2019-10-13 21:06:27,737 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 16 [2019-10-13 21:06:27,771 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:06:27,771 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:06:27,893 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-13 21:06:27,896 INFO L272 AbstractInterpreter]: Visited 15 different actions 61 times. Merged at 5 different actions 28 times. Widened at 4 different actions 11 times. Performed 121 root evaluator evaluations with a maximum evaluation depth of 4. Performed 121 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 7 fixpoints after 3 different actions. Largest state had 3 variables. [2019-10-13 21:06:27,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:27,902 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:06:27,902 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:06:27,902 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2019-10-13 21:06:27,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835581849] [2019-10-13 21:06:27,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:06:27,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:27,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:06:27,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:06:27,905 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2019-10-13 21:06:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:27,986 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-10-13 21:06:27,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:06:27,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-10-13 21:06:27,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:27,989 INFO L225 Difference]: With dead ends: 33 [2019-10-13 21:06:27,989 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 21:06:27,989 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:06:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 21:06:27,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-13 21:06:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 21:06:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2019-10-13 21:06:27,998 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 15 [2019-10-13 21:06:27,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:27,999 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2019-10-13 21:06:27,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:06:27,999 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2019-10-13 21:06:28,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 21:06:28,000 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:28,000 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:28,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:06:28,203 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:28,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:28,204 INFO L82 PathProgramCache]: Analyzing trace with hash -306680324, now seen corresponding path program 2 times [2019-10-13 21:06:28,205 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:28,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689173298] [2019-10-13 21:06:28,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:28,205 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:28,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:28,270 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 21:06:28,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689173298] [2019-10-13 21:06:28,271 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531716990] [2019-10-13 21:06:28,271 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 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 21:06:28,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 21:06:28,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:06:28,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 21:06:28,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:06:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:06:28,360 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:06:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 21:06:28,402 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:06:28,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5] total 10 [2019-10-13 21:06:28,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750884518] [2019-10-13 21:06:28,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 21:06:28,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:28,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 21:06:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:06:28,405 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand 7 states. [2019-10-13 21:06:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:28,447 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2019-10-13 21:06:28,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:06:28,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-10-13 21:06:28,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:28,450 INFO L225 Difference]: With dead ends: 45 [2019-10-13 21:06:28,451 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 21:06:28,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:06:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 21:06:28,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 21:06:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 21:06:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 21:06:28,454 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2019-10-13 21:06:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:28,454 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 21:06:28,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 21:06:28,455 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 21:06:28,455 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 21:06:28,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:06:28,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 21:06:28,714 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-13 21:06:28,714 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:28,714 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:28,714 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 21:06:28,714 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 21:06:28,725 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 21:06:28,725 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-10-13 21:06:28,725 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 27) no Hoare annotation was computed. [2019-10-13 21:06:28,725 INFO L439 ceAbstractionStarter]: At program point L21-2(lines 21 23) the Hoare annotation is: (= main_~k~0 4) [2019-10-13 21:06:28,725 INFO L439 ceAbstractionStarter]: At program point L21-3(lines 15 24) the Hoare annotation is: (or (= main_~k~0 4) (and (<= (+ main_~j~0 100) 0) (<= main_~i~0 0))) [2019-10-13 21:06:28,726 INFO L439 ceAbstractionStarter]: At program point L17-2(lines 17 19) the Hoare annotation is: (or (= main_~k~0 4) (<= main_~i~0 1)) [2019-10-13 21:06:28,726 INFO L443 ceAbstractionStarter]: For program point L17-3(lines 17 19) no Hoare annotation was computed. [2019-10-13 21:06:28,726 INFO L439 ceAbstractionStarter]: At program point L15-2(lines 15 24) the Hoare annotation is: (= main_~k~0 4) [2019-10-13 21:06:28,726 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 27) no Hoare annotation was computed. [2019-10-13 21:06:28,726 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 27) the Hoare annotation is: true [2019-10-13 21:06:28,727 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-13 21:06:28,727 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-13 21:06:28,727 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-13 21:06:28,727 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-13 21:06:28,727 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-13 21:06:28,727 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-13 21:06:28,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:06:28 BoogieIcfgContainer [2019-10-13 21:06:28,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:06:28,759 INFO L168 Benchmark]: Toolchain (without parser) took 2362.93 ms. Allocated memory was 137.4 MB in the beginning and 232.8 MB in the end (delta: 95.4 MB). Free memory was 102.4 MB in the beginning and 200.6 MB in the end (delta: -98.3 MB). Peak memory consumption was 88.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:28,760 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2019-10-13 21:06:28,761 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.30 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 93.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:28,763 INFO L168 Benchmark]: Boogie Preprocessor took 141.62 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 93.0 MB in the beginning and 180.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:28,764 INFO L168 Benchmark]: RCFGBuilder took 230.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 168.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:28,765 INFO L168 Benchmark]: TraceAbstraction took 1713.19 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 168.2 MB in the beginning and 200.6 MB in the end (delta: -32.4 MB). Peak memory consumption was 90.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:28,771 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.30 ms. Allocated memory is still 137.4 MB. Free memory was 102.2 MB in the beginning and 93.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.62 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 93.0 MB in the beginning and 180.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 230.96 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 168.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1713.19 ms. Allocated memory was 201.9 MB in the beginning and 232.8 MB in the end (delta: 30.9 MB). Free memory was 168.2 MB in the beginning and 200.6 MB in the end (delta: -32.4 MB). Peak memory consumption was 90.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 15]: Loop Invariant Derived loop invariant: k == 4 || (j + 100 <= 0 && i <= 0) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: k == 4 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: k == 4 || i <= 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 16 SDslu, 108 SDs, 0 SdLazy, 26 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=4, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 14 PreInvPairs, 29 NumberOfFragments, 31 HoareAnnotationTreeSize, 14 FomulaSimplifications, 66 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 118 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 151 ConstructedInterpolants, 0 QuantifiedInterpolants, 4613 SizeOfPredicates, 3 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 9 InterpolantComputations, 5 PerfectInterpolantSequences, 98/103 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...