/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 00:34:44,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 00:34:44,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 00:34:44,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 00:34:44,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 00:34:44,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 00:34:44,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 00:34:44,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 00:34:44,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 00:34:44,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 00:34:44,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 00:34:44,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 00:34:44,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 00:34:44,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 00:34:44,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 00:34:44,222 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 00:34:44,223 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 00:34:44,224 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 00:34:44,225 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 00:34:44,228 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 00:34:44,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 00:34:44,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 00:34:44,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 00:34:44,238 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 00:34:44,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 00:34:44,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 00:34:44,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 00:34:44,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 00:34:44,261 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 00:34:44,285 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 00:34:44,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 00:34:44,287 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 00:34:44,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 00:34:44,288 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 00:34:44,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 00:34:44,288 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 00:34:44,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 00:34:44,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 00:34:44,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 00:34:44,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 00:34:44,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 00:34:44,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 00:34:44,291 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 00:34:44,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 00:34:44,291 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 00:34:44,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 00:34:44,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 00:34:44,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 00:34:44,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 00:34:44,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 00:34:44,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:34:44,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 00:34:44,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 00:34:44,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 00:34:44,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 00:34:44,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 00:34:44,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 00:34:44,294 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 [2019-11-07 00:34:44,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 00:34:44,607 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 00:34:44,611 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 00:34:44,612 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 00:34:44,613 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 00:34:44,613 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2019-11-07 00:34:44,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98987964d/d831a526422a4b1091294a86f03bccb4/FLAG838f41e33 [2019-11-07 00:34:45,194 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 00:34:45,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2019-11-07 00:34:45,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98987964d/d831a526422a4b1091294a86f03bccb4/FLAG838f41e33 [2019-11-07 00:34:45,531 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98987964d/d831a526422a4b1091294a86f03bccb4 [2019-11-07 00:34:45,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 00:34:45,542 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 00:34:45,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 00:34:45,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 00:34:45,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 00:34:45,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,550 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9c13921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45, skipping insertion in model container [2019-11-07 00:34:45,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,558 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 00:34:45,576 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 00:34:45,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:34:45,786 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 00:34:45,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 00:34:45,813 INFO L192 MainTranslator]: Completed translation [2019-11-07 00:34:45,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45 WrapperNode [2019-11-07 00:34:45,814 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 00:34:45,815 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 00:34:45,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 00:34:45,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 00:34:45,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,927 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... [2019-11-07 00:34:45,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 00:34:45,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 00:34:45,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 00:34:45,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 00:34:45,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 00:34:45,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 00:34:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 00:34:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 00:34:45,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 00:34:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 00:34:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 00:34:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 00:34:45,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 00:34:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 00:34:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 00:34:45,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 00:34:46,165 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 00:34:46,166 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 00:34:46,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:34:46 BoogieIcfgContainer [2019-11-07 00:34:46,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 00:34:46,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 00:34:46,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 00:34:46,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 00:34:46,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:34:45" (1/3) ... [2019-11-07 00:34:46,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c10a218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:34:46, skipping insertion in model container [2019-11-07 00:34:46,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:34:45" (2/3) ... [2019-11-07 00:34:46,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c10a218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:34:46, skipping insertion in model container [2019-11-07 00:34:46,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:34:46" (3/3) ... [2019-11-07 00:34:46,182 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2019-11-07 00:34:46,195 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 00:34:46,204 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 00:34:46,220 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 00:34:46,277 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 00:34:46,277 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 00:34:46,277 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 00:34:46,278 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 00:34:46,278 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 00:34:46,278 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 00:34:46,279 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 00:34:46,279 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 00:34:46,320 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-07 00:34:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:34:46,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:34:46,331 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:34:46,333 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:34:46,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:34:46,340 INFO L82 PathProgramCache]: Analyzing trace with hash -2009018560, now seen corresponding path program 1 times [2019-11-07 00:34:46,351 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:34:46,352 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813935381] [2019-11-07 00:34:46,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:34:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:34:46,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:46,462 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813935381] [2019-11-07 00:34:46,463 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:34:46,464 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 00:34:46,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078146563] [2019-11-07 00:34:46,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 00:34:46,471 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:34:46,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 00:34:46,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 00:34:46,484 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-11-07 00:34:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:34:46,505 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-07 00:34:46,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 00:34:46,507 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-07 00:34:46,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:34:46,515 INFO L225 Difference]: With dead ends: 34 [2019-11-07 00:34:46,515 INFO L226 Difference]: Without dead ends: 16 [2019-11-07 00:34:46,519 INFO L630 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 [2019-11-07 00:34:46,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-07 00:34:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-07 00:34:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-07 00:34:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-07 00:34:46,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-07 00:34:46,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:34:46,556 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-07 00:34:46,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 00:34:46,556 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-07 00:34:46,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 00:34:46,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:34:46,557 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:34:46,558 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:34:46,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:34:46,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2019177291, now seen corresponding path program 1 times [2019-11-07 00:34:46,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:34:46,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519878916] [2019-11-07 00:34:46,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:34:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:34:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:46,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519878916] [2019-11-07 00:34:46,716 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:34:46,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 00:34:46,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771912580] [2019-11-07 00:34:46,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 00:34:46,720 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:34:46,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 00:34:46,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 00:34:46,721 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-11-07 00:34:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:34:46,840 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-07 00:34:46,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:34:46,840 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-07 00:34:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:34:46,841 INFO L225 Difference]: With dead ends: 27 [2019-11-07 00:34:46,842 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 00:34:46,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:34:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 00:34:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-07 00:34:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 00:34:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-07 00:34:46,860 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 10 [2019-11-07 00:34:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:34:46,861 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-07 00:34:46,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 00:34:46,861 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-07 00:34:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-07 00:34:46,862 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:34:46,862 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:34:46,863 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:34:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:34:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1543015754, now seen corresponding path program 1 times [2019-11-07 00:34:46,864 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:34:46,864 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019942030] [2019-11-07 00:34:46,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:34:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:34:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:46,959 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019942030] [2019-11-07 00:34:46,960 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935610298] [2019-11-07 00:34:46,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:34:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:34:47,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-07 00:34:47,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:34:47,032 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:34:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:47,066 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:34:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:47,094 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1731947493] [2019-11-07 00:34:47,111 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 14 [2019-11-07 00:34:47,151 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 00:34:47,151 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 00:34:47,277 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-11-07 00:34:47,283 INFO L272 AbstractInterpreter]: Visited 13 different actions 37 times. Merged at 4 different actions 12 times. Widened at 1 different actions 1 times. Performed 64 root evaluator evaluations with a maximum evaluation depth of 4. Performed 64 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-11-07 00:34:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:34:47,289 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 00:34:47,289 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 00:34:47,289 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2019-11-07 00:34:47,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478625767] [2019-11-07 00:34:47,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 00:34:47,290 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:34:47,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 00:34:47,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:34:47,291 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2019-11-07 00:34:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:34:47,370 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-11-07 00:34:47,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-07 00:34:47,371 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-11-07 00:34:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:34:47,373 INFO L225 Difference]: With dead ends: 30 [2019-11-07 00:34:47,373 INFO L226 Difference]: Without dead ends: 26 [2019-11-07 00:34:47,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-07 00:34:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-07 00:34:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2019-11-07 00:34:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 00:34:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-11-07 00:34:47,379 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-11-07 00:34:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:34:47,379 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-11-07 00:34:47,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 00:34:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-11-07 00:34:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-07 00:34:47,381 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:34:47,381 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:34:47,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:34:47,586 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:34:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:34:47,587 INFO L82 PathProgramCache]: Analyzing trace with hash -595645528, now seen corresponding path program 1 times [2019-11-07 00:34:47,587 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:34:47,588 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766910645] [2019-11-07 00:34:47,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:34:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:34:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:47,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766910645] [2019-11-07 00:34:47,660 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 00:34:47,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 00:34:47,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96170662] [2019-11-07 00:34:47,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:34:47,661 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:34:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:34:47,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-07 00:34:47,662 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2019-11-07 00:34:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:34:47,752 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-07 00:34:47,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:34:47,753 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-07 00:34:47,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:34:47,755 INFO L225 Difference]: With dead ends: 31 [2019-11-07 00:34:47,755 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 00:34:47,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-07 00:34:47,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 00:34:47,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2019-11-07 00:34:47,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-07 00:34:47,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2019-11-07 00:34:47,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2019-11-07 00:34:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:34:47,765 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2019-11-07 00:34:47,765 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:34:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2019-11-07 00:34:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 00:34:47,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 00:34:47,768 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 00:34:47,768 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 00:34:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 00:34:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1695932857, now seen corresponding path program 1 times [2019-11-07 00:34:47,770 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 00:34:47,770 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044984218] [2019-11-07 00:34:47,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 00:34:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:34:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:47,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044984218] [2019-11-07 00:34:47,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024605031] [2019-11-07 00:34:47,880 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 [2019-11-07 00:34:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 00:34:47,923 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-07 00:34:47,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 00:34:48,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:34:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:48,053 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 00:34:48,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:34:48,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 00:34:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 00:34:48,159 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 00:34:48,159 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 9] total 15 [2019-11-07 00:34:48,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662441571] [2019-11-07 00:34:48,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 00:34:48,163 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 00:34:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 00:34:48,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2019-11-07 00:34:48,164 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 6 states. [2019-11-07 00:34:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 00:34:48,234 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2019-11-07 00:34:48,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 00:34:48,235 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-07 00:34:48,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 00:34:48,235 INFO L225 Difference]: With dead ends: 19 [2019-11-07 00:34:48,235 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 00:34:48,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2019-11-07 00:34:48,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 00:34:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 00:34:48,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 00:34:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 00:34:48,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-11-07 00:34:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 00:34:48,237 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 00:34:48,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 00:34:48,238 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 00:34:48,238 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 00:34:48,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 00:34:48,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 00:34:48,566 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-11-07 00:34:48,566 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:34:48,566 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 00:34:48,566 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 00:34:48,566 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 00:34:48,567 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 00:34:48,567 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 23) the Hoare annotation is: true [2019-11-07 00:34:48,567 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 23) no Hoare annotation was computed. [2019-11-07 00:34:48,567 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-11-07 00:34:48,567 INFO L439 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)) [2019-11-07 00:34:48,568 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2019-11-07 00:34:48,568 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 15 17) no Hoare annotation was computed. [2019-11-07 00:34:48,568 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 23) no Hoare annotation was computed. [2019-11-07 00:34:48,568 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 19) the Hoare annotation is: (and (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)) [2019-11-07 00:34:48,568 INFO L439 ceAbstractionStarter]: At program point L14-3(lines 14 19) the Hoare annotation is: (and (<= 0 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0)) (<= 0 main_~x~0)) [2019-11-07 00:34:48,568 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-11-07 00:34:48,576 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-11-07 00:34:48,576 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-11-07 00:34:48,576 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-07 00:34:48,576 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-11-07 00:34:48,576 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-11-07 00:34:48,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:34:48 BoogieIcfgContainer [2019-11-07 00:34:48,601 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 00:34:48,604 INFO L168 Benchmark]: Toolchain (without parser) took 3061.94 ms. Allocated memory was 113.2 MB in the beginning and 184.5 MB in the end (delta: 71.3 MB). Free memory was 73.7 MB in the beginning and 167.1 MB in the end (delta: -93.4 MB). Peak memory consumption was 66.6 MB. Max. memory is 7.1 GB. [2019-11-07 00:34:48,608 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 113.2 MB. Free memory was 91.0 MB in the beginning and 90.9 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. [2019-11-07 00:34:48,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.64 ms. Allocated memory is still 113.2 MB. Free memory was 73.4 MB in the beginning and 64.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-11-07 00:34:48,614 INFO L168 Benchmark]: Boogie Preprocessor took 115.56 ms. Allocated memory was 113.2 MB in the beginning and 152.6 MB in the end (delta: 39.3 MB). Free memory was 64.2 MB in the beginning and 138.9 MB in the end (delta: -74.7 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-11-07 00:34:48,615 INFO L168 Benchmark]: RCFGBuilder took 236.99 ms. Allocated memory is still 152.6 MB. Free memory was 138.9 MB in the beginning and 128.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2019-11-07 00:34:48,615 INFO L168 Benchmark]: TraceAbstraction took 2433.12 ms. Allocated memory was 152.6 MB in the beginning and 184.5 MB in the end (delta: 32.0 MB). Free memory was 127.6 MB in the beginning and 167.1 MB in the end (delta: -39.6 MB). Peak memory consumption was 81.1 MB. Max. memory is 7.1 GB. [2019-11-07 00:34:48,622 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 113.2 MB. Free memory was 91.0 MB in the beginning and 90.9 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.64 ms. Allocated memory is still 113.2 MB. Free memory was 73.4 MB in the beginning and 64.2 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.56 ms. Allocated memory was 113.2 MB in the beginning and 152.6 MB in the end (delta: 39.3 MB). Free memory was 64.2 MB in the beginning and 138.9 MB in the end (delta: -74.7 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 236.99 ms. Allocated memory is still 152.6 MB. Free memory was 138.9 MB in the beginning and 128.0 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2433.12 ms. Allocated memory was 152.6 MB in the beginning and 184.5 MB in the end (delta: 32.0 MB). Free memory was 127.6 MB in the beginning and 167.1 MB in the end (delta: -39.6 MB). Peak memory consumption was 81.1 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: 14]: Loop Invariant Derived loop invariant: (0 <= m && (n <= 0 || m < n)) && 0 <= x - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Result: SAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 73 SDtfs, 40 SDslu, 156 SDs, 0 SdLazy, 103 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=2, 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, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 13 PreInvPairs, 18 NumberOfFragments, 47 HoareAnnotationTreeSize, 13 FomulaSimplifications, 105 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 53 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 119 ConstructedInterpolants, 0 QuantifiedInterpolants, 4273 SizeOfPredicates, 8 NumberOfNonLiveVariables, 81 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 8/14 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...