/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:02:44,978 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:02:44,981 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:02:45,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:02:45,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:02:45,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:02:45,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:02:45,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:02:45,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:02:45,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:02:45,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:02:45,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:02:45,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:02:45,045 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:02:45,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:02:45,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:02:45,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:02:45,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:02:45,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:02:45,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:02:45,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:02:45,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:02:45,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:02:45,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:02:45,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:02:45,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:02:45,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:02:45,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:02:45,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:02:45,100 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:02:45,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:02:45,102 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:02:45,102 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:02:45,102 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:02:45,103 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:02:45,103 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:02:45,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:02:45,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:02:45,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:02:45,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:02:45,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:02:45,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:02:45,104 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:02:45,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:02:45,105 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:02:45,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:02:45,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:02:45,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:02:45,107 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:02:45,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:02:45,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:02:45,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:02:45,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:02:45,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:02:45,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:02:45,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:02:45,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:02:45,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:02:45,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=NARROWEST; [2020-08-18 22:02:45,387 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:02:45,408 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:02:45,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:02:45,419 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:02:45,423 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:02:45,424 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-08-18 22:02:45,484 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67fc53292/f346ac70b178415b97bbc735bd9e25e7/FLAG7ef4275af [2020-08-18 22:02:45,845 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:02:45,846 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2020-08-18 22:02:45,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67fc53292/f346ac70b178415b97bbc735bd9e25e7/FLAG7ef4275af [2020-08-18 22:02:46,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67fc53292/f346ac70b178415b97bbc735bd9e25e7 [2020-08-18 22:02:46,240 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:02:46,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:02:46,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:46,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:02:46,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:02:46,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34e5dc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46, skipping insertion in model container [2020-08-18 22:02:46,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:02:46,280 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:02:46,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:46,462 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:02:46,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:02:46,503 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:02:46,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46 WrapperNode [2020-08-18 22:02:46,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:02:46,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:02:46,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:02:46,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:02:46,522 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... [2020-08-18 22:02:46,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:02:46,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:02:46,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:02:46,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:02:46,698 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 22:02:46,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:02:46,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:02:46,784 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:02:46,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:02:46,786 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:02:46,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:02:46,786 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:02:46,786 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:02:46,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:02:46,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:02:46,788 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:02:46,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:02:46,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:02:47,181 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:02:47,182 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 22:02:47,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:47 BoogieIcfgContainer [2020-08-18 22:02:47,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:02:47,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:02:47,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:02:47,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:02:47,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:02:46" (1/3) ... [2020-08-18 22:02:47,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a129672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:47, skipping insertion in model container [2020-08-18 22:02:47,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:02:46" (2/3) ... [2020-08-18 22:02:47,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a129672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:02:47, skipping insertion in model container [2020-08-18 22:02:47,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:02:47" (3/3) ... [2020-08-18 22:02:47,195 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2020-08-18 22:02:47,227 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:02:47,236 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:02:47,252 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:02:47,278 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:02:47,278 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:02:47,278 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:02:47,278 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:02:47,278 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:02:47,278 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:02:47,279 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:02:47,279 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:02:47,302 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 22:02:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 22:02:47,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:47,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:47,311 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:47,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:47,318 INFO L82 PathProgramCache]: Analyzing trace with hash -234903868, now seen corresponding path program 1 times [2020-08-18 22:02:47,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:47,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466439333] [2020-08-18 22:02:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:47,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:47,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466439333] [2020-08-18 22:02:47,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:47,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-18 22:02:47,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564104920] [2020-08-18 22:02:47,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-18 22:02:47,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:47,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-18 22:02:47,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 22:02:47,478 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-08-18 22:02:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:47,511 INFO L93 Difference]: Finished difference Result 87 states and 156 transitions. [2020-08-18 22:02:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-18 22:02:47,513 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-08-18 22:02:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:47,524 INFO L225 Difference]: With dead ends: 87 [2020-08-18 22:02:47,524 INFO L226 Difference]: Without dead ends: 42 [2020-08-18 22:02:47,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-18 22:02:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-18 22:02:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-18 22:02:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 22:02:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-08-18 22:02:47,585 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 12 [2020-08-18 22:02:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:47,586 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-08-18 22:02:47,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-18 22:02:47,587 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2020-08-18 22:02:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:02:47,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:47,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:47,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:02:47,590 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:47,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1276958999, now seen corresponding path program 1 times [2020-08-18 22:02:47,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:47,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489507327] [2020-08-18 22:02:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:47,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489507327] [2020-08-18 22:02:47,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:47,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:02:47,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145507773] [2020-08-18 22:02:47,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:47,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:47,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:47,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:47,709 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2020-08-18 22:02:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:47,902 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2020-08-18 22:02:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:47,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 22:02:47,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:47,905 INFO L225 Difference]: With dead ends: 48 [2020-08-18 22:02:47,905 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 22:02:47,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:47,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 22:02:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-18 22:02:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 22:02:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2020-08-18 22:02:47,922 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 13 [2020-08-18 22:02:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:47,923 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2020-08-18 22:02:47,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2020-08-18 22:02:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 22:02:47,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:47,924 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:47,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:02:47,925 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:47,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:47,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1880963538, now seen corresponding path program 1 times [2020-08-18 22:02:47,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:47,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542286261] [2020-08-18 22:02:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:47,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:47,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-18 22:02:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:48,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542286261] [2020-08-18 22:02:48,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:48,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:02:48,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634398623] [2020-08-18 22:02:48,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:02:48,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:48,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:02:48,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:02:48,002 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states. [2020-08-18 22:02:48,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:48,169 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-08-18 22:02:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:02:48,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 22:02:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:48,172 INFO L225 Difference]: With dead ends: 52 [2020-08-18 22:02:48,172 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 22:02:48,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 22:02:48,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-18 22:02:48,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-18 22:02:48,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-08-18 22:02:48,183 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2020-08-18 22:02:48,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:48,183 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-08-18 22:02:48,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:02:48,183 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-08-18 22:02:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 22:02:48,186 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:48,186 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:48,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:02:48,186 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:48,190 INFO L82 PathProgramCache]: Analyzing trace with hash 996212544, now seen corresponding path program 1 times [2020-08-18 22:02:48,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:48,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912900814] [2020-08-18 22:02:48,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:02:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:02:48,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912900814] [2020-08-18 22:02:48,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:02:48,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 22:02:48,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753467341] [2020-08-18 22:02:48,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 22:02:48,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:48,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 22:02:48,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:02:48,320 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2020-08-18 22:02:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:48,448 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2020-08-18 22:02:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 22:02:48,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-18 22:02:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:48,450 INFO L225 Difference]: With dead ends: 55 [2020-08-18 22:02:48,450 INFO L226 Difference]: Without dead ends: 53 [2020-08-18 22:02:48,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-18 22:02:48,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-08-18 22:02:48,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-18 22:02:48,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2020-08-18 22:02:48,463 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 19 [2020-08-18 22:02:48,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:48,464 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2020-08-18 22:02:48,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 22:02:48,464 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2020-08-18 22:02:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 22:02:48,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:02:48,466 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:02:48,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:02:48,467 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:02:48,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:02:48,467 INFO L82 PathProgramCache]: Analyzing trace with hash -381964826, now seen corresponding path program 1 times [2020-08-18 22:02:48,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:02:48,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618322857] [2020-08-18 22:02:48,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:02:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:02:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-18 22:02:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 22:02:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 22:02:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:02:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 22:02:48,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618322857] [2020-08-18 22:02:48,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:02:48,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 22:02:48,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601635261] [2020-08-18 22:02:48,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 22:02:48,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:02:48,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 22:02:48,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 22:02:48,647 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 7 states. [2020-08-18 22:02:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:02:48,824 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-08-18 22:02:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:02:48,824 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-08-18 22:02:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:02:48,825 INFO L225 Difference]: With dead ends: 51 [2020-08-18 22:02:48,825 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:02:48,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:02:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:02:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:02:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:02:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:02:48,829 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2020-08-18 22:02:48,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:02:48,830 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:02:48,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 22:02:48,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:02:48,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:02:48,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:02:48,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:02:49,039 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:02:49,039 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:02:49,039 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:02:49,039 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:02:49,039 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:02:49,040 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:02:49,040 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:02:49,040 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 22:02:49,040 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:02:49,040 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 22:02:49,040 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-18 22:02:49,041 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed. [2020-08-18 22:02:49,041 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 66) no Hoare annotation was computed. [2020-08-18 22:02:49,041 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,041 INFO L264 CegarLoopResult]: At program point L23-1(line 23) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,041 INFO L268 CegarLoopResult]: For program point L48(lines 48 52) no Hoare annotation was computed. [2020-08-18 22:02:49,042 INFO L268 CegarLoopResult]: For program point L44(lines 44 53) no Hoare annotation was computed. [2020-08-18 22:02:49,042 INFO L264 CegarLoopResult]: At program point L49(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,042 INFO L264 CegarLoopResult]: At program point L49-1(line 49) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,042 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,042 INFO L264 CegarLoopResult]: At program point L45-1(line 45) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,043 INFO L264 CegarLoopResult]: At program point L37-2(lines 37 61) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,043 INFO L264 CegarLoopResult]: At program point L37-3(lines 37 61) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,043 INFO L264 CegarLoopResult]: At program point L62(line 62) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,043 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,043 INFO L264 CegarLoopResult]: At program point L21-2(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,044 INFO L264 CegarLoopResult]: At program point L21-3(lines 21 33) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,044 INFO L268 CegarLoopResult]: For program point L46(line 46) no Hoare annotation was computed. [2020-08-18 22:02:49,044 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 66) no Hoare annotation was computed. [2020-08-18 22:02:49,044 INFO L268 CegarLoopResult]: For program point L38(lines 38 42) no Hoare annotation was computed. [2020-08-18 22:02:49,044 INFO L264 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,045 INFO L271 CegarLoopResult]: At program point L63(lines 14 66) the Hoare annotation is: true [2020-08-18 22:02:49,045 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,045 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 66) the Hoare annotation is: true [2020-08-18 22:02:49,045 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,045 INFO L268 CegarLoopResult]: For program point L59(line 59) no Hoare annotation was computed. [2020-08-18 22:02:49,045 INFO L268 CegarLoopResult]: For program point L55(lines 55 57) no Hoare annotation was computed. [2020-08-18 22:02:49,046 INFO L268 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-08-18 22:02:49,046 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-18 22:02:49,046 INFO L268 CegarLoopResult]: For program point L18-1(line 18) no Hoare annotation was computed. [2020-08-18 22:02:49,046 INFO L268 CegarLoopResult]: For program point L43(lines 43 57) no Hoare annotation was computed. [2020-08-18 22:02:49,046 INFO L264 CegarLoopResult]: At program point L43-1(lines 43 57) the Hoare annotation is: (and (<= 0 main_~t~0) (<= (+ main_~t~0 1) main_~tagbuf_len~0)) [2020-08-18 22:02:49,046 INFO L264 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,046 INFO L264 CegarLoopResult]: At program point L39-1(line 39) the Hoare annotation is: (and (<= 0 main_~t~0) (<= main_~t~0 main_~tagbuf_len~0)) [2020-08-18 22:02:49,047 INFO L268 CegarLoopResult]: For program point L35(line 35) no Hoare annotation was computed. [2020-08-18 22:02:49,047 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 22:02:49,047 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:02:49,047 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 22:02:49,047 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 22:02:49,047 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 22:02:49,048 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 22:02:49,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:02:49 BoogieIcfgContainer [2020-08-18 22:02:49,066 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:02:49,069 INFO L168 Benchmark]: Toolchain (without parser) took 2826.39 ms. Allocated memory was 141.0 MB in the beginning and 231.7 MB in the end (delta: 90.7 MB). Free memory was 103.5 MB in the beginning and 150.9 MB in the end (delta: -47.4 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:49,071 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 22:02:49,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.57 ms. Allocated memory is still 141.0 MB. Free memory was 103.3 MB in the beginning and 93.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:49,073 INFO L168 Benchmark]: Boogie Preprocessor took 188.82 ms. Allocated memory was 141.0 MB in the beginning and 208.1 MB in the end (delta: 67.1 MB). Free memory was 93.3 MB in the beginning and 186.8 MB in the end (delta: -93.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:49,074 INFO L168 Benchmark]: RCFGBuilder took 492.08 ms. Allocated memory is still 208.1 MB. Free memory was 186.8 MB in the beginning and 170.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:49,075 INFO L168 Benchmark]: TraceAbstraction took 1879.02 ms. Allocated memory was 208.1 MB in the beginning and 231.7 MB in the end (delta: 23.6 MB). Free memory was 169.7 MB in the beginning and 150.9 MB in the end (delta: 18.8 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2020-08-18 22:02:49,079 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 141.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.57 ms. Allocated memory is still 141.0 MB. Free memory was 103.3 MB in the beginning and 93.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 188.82 ms. Allocated memory was 141.0 MB in the beginning and 208.1 MB in the end (delta: 67.1 MB). Free memory was 93.3 MB in the beginning and 186.8 MB in the end (delta: -93.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 492.08 ms. Allocated memory is still 208.1 MB. Free memory was 186.8 MB in the beginning and 170.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1879.02 ms. Allocated memory was 208.1 MB in the beginning and 231.7 MB in the end (delta: 23.6 MB). Free memory was 169.7 MB in the beginning and 150.9 MB in the end (delta: 18.8 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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: 21]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 252 SDtfs, 50 SDslu, 490 SDs, 0 SdLazy, 231 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 59 PreInvPairs, 82 NumberOfFragments, 152 HoareAnnotationTreeSize, 59 FomulaSimplifications, 52 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 90 ConstructedInterpolants, 0 QuantifiedInterpolants, 3756 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 24/25 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...