/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:47:19,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:47:19,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:47:19,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:47:19,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:47:19,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:47:19,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:47:19,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:47:19,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:47:19,330 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:47:19,331 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:47:19,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:47:19,334 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:47:19,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:47:19,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:47:19,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:47:19,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:47:19,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:47:19,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:47:19,356 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:47:19,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:47:19,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:47:19,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:47:19,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:47:19,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:47:19,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:47:19,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:47:19,387 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:47:19,388 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:47:19,409 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:47:19,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:47:19,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:47:19,412 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:47:19,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:47:19,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:47:19,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:47:19,413 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:47:19,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:47:19,414 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:47:19,415 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:47:19,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:47:19,416 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:47:19,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:47:19,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:47:19,417 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:47:19,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:47:19,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:47:19,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:47:19,417 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:47:19,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:47:19,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:47:19,418 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:47:19,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:47:19,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:47:19,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:47:19,890 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:47:19,891 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:47:19,892 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-09-04 17:47:19,987 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84b20302d/be227a8f72734ee099309788a64a846f/FLAG6fd33b4b9 [2020-09-04 17:47:20,501 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:47:20,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/NetBSD_loop.i [2020-09-04 17:47:20,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84b20302d/be227a8f72734ee099309788a64a846f/FLAG6fd33b4b9 [2020-09-04 17:47:20,840 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84b20302d/be227a8f72734ee099309788a64a846f [2020-09-04 17:47:20,859 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:47:20,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:47:20,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:47:20,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:47:20,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:47:20,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:47:20" (1/1) ... [2020-09-04 17:47:20,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36345b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:20, skipping insertion in model container [2020-09-04 17:47:20,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:47:20" (1/1) ... [2020-09-04 17:47:20,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:47:20,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:47:21,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:47:21,193 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:47:21,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:47:21,228 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:47:21,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21 WrapperNode [2020-09-04 17:47:21,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:47:21,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:47:21,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:47:21,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:47:21,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (1/1) ... [2020-09-04 17:47:21,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (1/1) ... [2020-09-04 17:47:21,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (1/1) ... [2020-09-04 17:47:21,255 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (1/1) ... [2020-09-04 17:47:21,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (1/1) ... [2020-09-04 17:47:21,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (1/1) ... [2020-09-04 17:47:21,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (1/1) ... [2020-09-04 17:47:21,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:47:21,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:47:21,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:47:21,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:47:21,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (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 [2020-09-04 17:47:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:47:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:47:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:47:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:47:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:47:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:47:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:47:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:47:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:47:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:47:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:47:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:47:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:47:21,671 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:47:21,672 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:47:21,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:47:21 BoogieIcfgContainer [2020-09-04 17:47:21,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:47:21,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:47:21,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:47:21,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:47:21,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:47:20" (1/3) ... [2020-09-04 17:47:21,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b2da8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:47:21, skipping insertion in model container [2020-09-04 17:47:21,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:47:21" (2/3) ... [2020-09-04 17:47:21,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b2da8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:47:21, skipping insertion in model container [2020-09-04 17:47:21,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:47:21" (3/3) ... [2020-09-04 17:47:21,693 INFO L109 eAbstractionObserver]: Analyzing ICFG NetBSD_loop.i [2020-09-04 17:47:21,707 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:47:21,721 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:47:21,759 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:47:21,834 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:47:21,834 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:47:21,834 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:47:21,835 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:47:21,839 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:47:21,839 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:47:21,839 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:47:21,839 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:47:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-09-04 17:47:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 17:47:21,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:21,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:21,873 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2007421113, now seen corresponding path program 1 times [2020-09-04 17:47:21,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:21,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584974348] [2020-09-04 17:47:21,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:21,964 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:22,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:22,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:22,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584974348] [2020-09-04 17:47:22,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:22,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 17:47:22,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498318211] [2020-09-04 17:47:22,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 17:47:22,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 17:47:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 17:47:22,268 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 7 states. [2020-09-04 17:47:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:22,500 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2020-09-04 17:47:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:47:22,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-04 17:47:22,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:22,518 INFO L225 Difference]: With dead ends: 68 [2020-09-04 17:47:22,518 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 17:47:22,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:47:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 17:47:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-04 17:47:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 17:47:22,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-04 17:47:22,595 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 24 [2020-09-04 17:47:22,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:22,596 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-04 17:47:22,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 17:47:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-04 17:47:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 17:47:22,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:22,598 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:22,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:47:22,599 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:22,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1994781074, now seen corresponding path program 1 times [2020-09-04 17:47:22,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:22,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721167274] [2020-09-04 17:47:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:22,604 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:22,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:22,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:47:22,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:22,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:22,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721167274] [2020-09-04 17:47:22,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:22,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:47:22,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196920179] [2020-09-04 17:47:22,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:47:22,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:22,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:47:22,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:47:22,765 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2020-09-04 17:47:22,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:22,945 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-04 17:47:22,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:47:22,946 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-09-04 17:47:22,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:22,948 INFO L225 Difference]: With dead ends: 46 [2020-09-04 17:47:22,949 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 17:47:22,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:47:22,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 17:47:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-04 17:47:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 17:47:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-04 17:47:22,966 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 29 [2020-09-04 17:47:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:22,967 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-04 17:47:22,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:47:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-04 17:47:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 17:47:22,969 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:22,969 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:22,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:47:22,970 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:22,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1065397402, now seen corresponding path program 1 times [2020-09-04 17:47:22,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:22,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [483290656] [2020-09-04 17:47:22,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:23,010 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:47:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 17:47:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:23,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [483290656] [2020-09-04 17:47:23,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:23,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 17:47:23,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384597076] [2020-09-04 17:47:23,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 17:47:23,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:23,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 17:47:23,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 17:47:23,226 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 9 states. [2020-09-04 17:47:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:23,410 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-04 17:47:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 17:47:23,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-09-04 17:47:23,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:23,413 INFO L225 Difference]: With dead ends: 50 [2020-09-04 17:47:23,413 INFO L226 Difference]: Without dead ends: 48 [2020-09-04 17:47:23,414 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-09-04 17:47:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-04 17:47:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-09-04 17:47:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-04 17:47:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-09-04 17:47:23,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 38 [2020-09-04 17:47:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:23,427 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-09-04 17:47:23,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 17:47:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-09-04 17:47:23,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-04 17:47:23,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:23,429 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:23,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:47:23,430 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:23,430 INFO L82 PathProgramCache]: Analyzing trace with hash 470853039, now seen corresponding path program 2 times [2020-09-04 17:47:23,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:23,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446435083] [2020-09-04 17:47:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:23,437 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:47:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 17:47:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:47:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:23,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446435083] [2020-09-04 17:47:23,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:23,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:47:23,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887126068] [2020-09-04 17:47:23,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:47:23,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:23,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:47:23,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:47:23,592 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 10 states. [2020-09-04 17:47:23,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:23,849 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2020-09-04 17:47:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 17:47:23,850 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-09-04 17:47:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:23,852 INFO L225 Difference]: With dead ends: 60 [2020-09-04 17:47:23,852 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 17:47:23,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:47:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 17:47:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-09-04 17:47:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 17:47:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-09-04 17:47:23,867 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 43 [2020-09-04 17:47:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:23,868 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-09-04 17:47:23,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:47:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-09-04 17:47:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-04 17:47:23,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:23,870 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:23,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:47:23,871 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:23,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2065107152, now seen corresponding path program 3 times [2020-09-04 17:47:23,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:23,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571916252] [2020-09-04 17:47:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:23,880 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-09-04 17:47:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 17:47:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-09-04 17:47:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-04 17:47:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-04 17:47:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 17:47:24,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571916252] [2020-09-04 17:47:24,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:24,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:47:24,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935151454] [2020-09-04 17:47:24,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:47:24,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:24,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:47:24,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:47:24,101 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 8 states. [2020-09-04 17:47:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:24,231 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2020-09-04 17:47:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 17:47:24,232 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-09-04 17:47:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:24,233 INFO L225 Difference]: With dead ends: 56 [2020-09-04 17:47:24,233 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 17:47:24,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:47:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 17:47:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 17:47:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 17:47:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 17:47:24,236 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 57 [2020-09-04 17:47:24,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:24,236 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 17:47:24,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:47:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 17:47:24,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 17:47:24,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:47:24,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 17:47:24,990 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-09-04 17:47:25,101 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-09-04 17:47:25,111 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:47:25,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:47:25,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 17:47:25,112 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 17:47:25,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 17:47:25,112 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 17:47:25,112 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:47:25,113 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:47:25,113 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 17:47:25,113 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 17:47:25,113 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 17:47:25,113 INFO L271 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2020-09-04 17:47:25,114 INFO L264 CegarLoopResult]: At program point L31(lines 27 32) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_p_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 17:47:25,114 INFO L264 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_p_off~0) (<= 0 |main_#t~post1|) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 17:47:25,114 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 1 main_~glob2_p_off~0) (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 |main_#t~post1|) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 17:47:25,114 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 17:47:25,115 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= (+ main_~pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 17:47:25,115 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 34) the Hoare annotation is: true [2020-09-04 17:47:25,119 INFO L264 CegarLoopResult]: At program point L27-3(lines 27 32) the Hoare annotation is: (and (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_p_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 17:47:25,119 INFO L271 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: true [2020-09-04 17:47:25,119 INFO L271 CegarLoopResult]: At program point L21-1(line 21) the Hoare annotation is: true [2020-09-04 17:47:25,119 INFO L271 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: true [2020-09-04 17:47:25,119 INFO L271 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: true [2020-09-04 17:47:25,120 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-09-04 17:47:25,120 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 34) the Hoare annotation is: true [2020-09-04 17:47:25,120 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0)) (.cse1 (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0)) (.cse2 (<= main_~pathbuf_off~0 0)) (.cse3 (<= 0 main_~pathbuf_off~0)) (.cse4 (<= 0 main_~glob2_pathbuf_off~0)) (.cse5 (<= main_~bound_off~0 main_~MAXPATHLEN~0))) (or (and .cse0 .cse1 (<= (+ main_~glob2_p_off~0 1) main_~MAXPATHLEN~0) .cse2 .cse3 (<= 0 main_~glob2_p_off~0) .cse4 .cse5) (and (<= 1 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2020-09-04 17:47:25,120 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 34) the Hoare annotation is: true [2020-09-04 17:47:25,121 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (let ((.cse0 (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0)) (.cse1 (<= main_~glob2_pathlim_off~0 main_~MAXPATHLEN~0)) (.cse2 (<= main_~pathbuf_off~0 0)) (.cse3 (<= 0 main_~pathbuf_off~0)) (.cse4 (<= 0 main_~glob2_pathbuf_off~0)) (.cse5 (<= main_~bound_off~0 main_~MAXPATHLEN~0))) (or (and .cse0 .cse1 (<= (+ main_~glob2_p_off~0 1) main_~MAXPATHLEN~0) .cse2 .cse3 (<= 0 main_~glob2_p_off~0) .cse4 .cse5) (and (<= 1 main_~glob2_p_off~0) (<= main_~glob2_p_off~0 main_~MAXPATHLEN~0) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5))) [2020-09-04 17:47:25,121 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (and (<= (+ main_~glob2_pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0) (<= 0 main_~glob2_pathbuf_off~0) (<= main_~bound_off~0 main_~MAXPATHLEN~0)) [2020-09-04 17:47:25,121 INFO L264 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: (and (<= (+ main_~pathbuf_off~0 1) main_~MAXPATHLEN~0) (<= main_~pathbuf_off~0 0) (<= 0 main_~pathbuf_off~0)) [2020-09-04 17:47:25,121 INFO L271 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: true [2020-09-04 17:47:25,121 INFO L264 CegarLoopResult]: At program point L22-1(line 22) the Hoare annotation is: (<= 1 main_~MAXPATHLEN~0) [2020-09-04 17:47:25,122 INFO L271 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: true [2020-09-04 17:47:25,122 INFO L271 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: true [2020-09-04 17:47:25,122 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-09-04 17:47:25,122 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 17:47:25,122 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:47:25,122 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:47:25,123 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:47:25,123 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-09-04 17:47:25,123 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 17:47:25,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:47:25 BoogieIcfgContainer [2020-09-04 17:47:25,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:47:25,154 INFO L168 Benchmark]: Toolchain (without parser) took 4292.86 ms. Allocated memory was 138.9 MB in the beginning and 245.9 MB in the end (delta: 107.0 MB). Free memory was 102.4 MB in the beginning and 126.8 MB in the end (delta: -24.4 MB). Peak memory consumption was 117.3 MB. Max. memory is 7.1 GB. [2020-09-04 17:47:25,155 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:47:25,155 INFO L168 Benchmark]: CACSL2BoogieTranslator took 367.45 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 92.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:47:25,157 INFO L168 Benchmark]: Boogie Preprocessor took 117.28 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 182.5 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:47:25,158 INFO L168 Benchmark]: RCFGBuilder took 331.23 ms. Allocated memory is still 202.9 MB. Free memory was 182.5 MB in the beginning and 168.0 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. [2020-09-04 17:47:25,159 INFO L168 Benchmark]: TraceAbstraction took 3470.61 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 168.0 MB in the beginning and 126.8 MB in the end (delta: 41.1 MB). Peak memory consumption was 118.9 MB. Max. memory is 7.1 GB. [2020-09-04 17:47:25,163 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 138.9 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 367.45 ms. Allocated memory is still 138.9 MB. Free memory was 102.2 MB in the beginning and 92.3 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.28 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.3 MB in the beginning and 182.5 MB in the end (delta: -90.2 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.23 ms. Allocated memory is still 202.9 MB. Free memory was 182.5 MB in the beginning and 168.0 MB in the end (delta: 14.6 MB). Peak memory consumption was 14.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3470.61 ms. Allocated memory was 202.9 MB in the beginning and 245.9 MB in the end (delta: 43.0 MB). Free memory was 168.0 MB in the beginning and 126.8 MB in the end (delta: 41.1 MB). Peak memory consumption was 118.9 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: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((glob2_pathbuf_off + 1 <= MAXPATHLEN && glob2_pathlim_off <= MAXPATHLEN) && pathbuf_off <= 0) && 0 <= pathbuf_off) && 0 <= glob2_p_off) && 0 <= glob2_pathbuf_off) && bound_off <= MAXPATHLEN - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.4s, OverallIterations: 5, TraceHistogramMax: 6, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 SDtfs, 158 SDslu, 687 SDs, 0 SdLazy, 311 SolverSat, 73 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 78 PreInvPairs, 114 NumberOfFragments, 341 HoareAnnotationTreeSize, 78 FomulaSimplifications, 989 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 36 FomulaSimplificationsInter, 341 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...