/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:59:35,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:59:35,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:59:35,405 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:59:35,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:59:35,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:59:35,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:59:35,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:59:35,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:59:35,413 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:59:35,414 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:59:35,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:59:35,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:59:35,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:59:35,418 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:59:35,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:59:35,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:59:35,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:59:35,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:59:35,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:59:35,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:59:35,430 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:59:35,431 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:59:35,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:59:35,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:59:35,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 21:59:35,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 21:59:35,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 21:59:35,443 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 21:59:35,444 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 21:59:35,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 21:59:35,445 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 21:59:35,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 21:59:35,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:59:35,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:59:35,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:59:35,449 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 21:59:35,462 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:59:35,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:59:35,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:59:35,464 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:59:35,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:59:35,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:59:35,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:59:35,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:59:35,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:59:35,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:59:35,466 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:59:35,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:59:35,466 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:59:35,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:59:35,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:59:35,467 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:59:35,467 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:59:35,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:59:35,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:59:35,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:59:35,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:59:35,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:59:35,468 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 21:59:35,939 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:59:35,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:59:35,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:59:35,965 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:59:35,965 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:59:35,966 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-09-04 21:59:36,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c30b7c29/5e431b358dbf442a902121be18be810e/FLAG3ed979ad0 [2020-09-04 21:59:36,635 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:59:36,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_1b.cil.c [2020-09-04 21:59:36,646 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c30b7c29/5e431b358dbf442a902121be18be810e/FLAG3ed979ad0 [2020-09-04 21:59:36,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c30b7c29/5e431b358dbf442a902121be18be810e [2020-09-04 21:59:36,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:59:36,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:59:36,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:59:36,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:59:36,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:59:36,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:59:36" (1/1) ... [2020-09-04 21:59:36,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae5b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:36, skipping insertion in model container [2020-09-04 21:59:36,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:59:36" (1/1) ... [2020-09-04 21:59:36,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:59:37,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:59:37,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:59:37,275 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:59:37,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:59:37,317 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:59:37,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37 WrapperNode [2020-09-04 21:59:37,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:59:37,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:59:37,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:59:37,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:59:37,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (1/1) ... [2020-09-04 21:59:37,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (1/1) ... [2020-09-04 21:59:37,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (1/1) ... [2020-09-04 21:59:37,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (1/1) ... [2020-09-04 21:59:37,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (1/1) ... [2020-09-04 21:59:37,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (1/1) ... [2020-09-04 21:59:37,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (1/1) ... [2020-09-04 21:59:37,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:59:37,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:59:37,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:59:37,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:59:37,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (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 21:59:37,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:59:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:59:37,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:59:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:59:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-04 21:59:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 21:59:37,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-09-04 21:59:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:59:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:59:37,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:59:37,849 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:59:37,850 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 21:59:37,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:59:37 BoogieIcfgContainer [2020-09-04 21:59:37,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:59:37,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:59:37,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:59:37,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:59:37,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:59:36" (1/3) ... [2020-09-04 21:59:37,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ed45b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:59:37, skipping insertion in model container [2020-09-04 21:59:37,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:59:37" (2/3) ... [2020-09-04 21:59:37,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ed45b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:59:37, skipping insertion in model container [2020-09-04 21:59:37,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:59:37" (3/3) ... [2020-09-04 21:59:37,881 INFO L109 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2020-09-04 21:59:37,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:59:37,919 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:59:37,945 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:59:37,979 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:59:37,980 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:59:37,980 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:59:37,980 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:59:37,980 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:59:37,980 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:59:37,981 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:59:37,981 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:59:38,010 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-09-04 21:59:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 21:59:38,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:38,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:59:38,034 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:38,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -936940309, now seen corresponding path program 1 times [2020-09-04 21:59:38,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:38,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526188711] [2020-09-04 21:59:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,273 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 21:59:38,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526188711] [2020-09-04 21:59:38,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:38,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:38,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035862231] [2020-09-04 21:59:38,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:38,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:38,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:38,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:38,313 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 3 states. [2020-09-04 21:59:38,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:38,451 INFO L93 Difference]: Finished difference Result 110 states and 156 transitions. [2020-09-04 21:59:38,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:38,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-04 21:59:38,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:38,469 INFO L225 Difference]: With dead ends: 110 [2020-09-04 21:59:38,469 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 21:59:38,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 21:59:38,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-09-04 21:59:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 21:59:38,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-09-04 21:59:38,533 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 15 [2020-09-04 21:59:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:38,534 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-09-04 21:59:38,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-09-04 21:59:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 21:59:38,535 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:38,535 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] [2020-09-04 21:59:38,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:59:38,540 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1261763386, now seen corresponding path program 1 times [2020-09-04 21:59:38,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:38,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771576052] [2020-09-04 21:59:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:38,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771576052] [2020-09-04 21:59:38,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:38,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:38,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639164382] [2020-09-04 21:59:38,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:38,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:38,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:38,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:38,596 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 3 states. [2020-09-04 21:59:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:38,673 INFO L93 Difference]: Finished difference Result 134 states and 172 transitions. [2020-09-04 21:59:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:38,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 21:59:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:38,676 INFO L225 Difference]: With dead ends: 134 [2020-09-04 21:59:38,676 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:59:38,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:59:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2020-09-04 21:59:38,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-04 21:59:38,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2020-09-04 21:59:38,703 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 22 [2020-09-04 21:59:38,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:38,703 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2020-09-04 21:59:38,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2020-09-04 21:59:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 21:59:38,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:38,705 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] [2020-09-04 21:59:38,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:59:38,706 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1258903450, now seen corresponding path program 1 times [2020-09-04 21:59:38,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:38,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217428131] [2020-09-04 21:59:38,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:59:38,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217428131] [2020-09-04 21:59:38,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:38,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:38,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903913008] [2020-09-04 21:59:38,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:38,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:38,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:38,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:38,753 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand 3 states. [2020-09-04 21:59:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:38,851 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2020-09-04 21:59:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:38,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 21:59:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:38,854 INFO L225 Difference]: With dead ends: 140 [2020-09-04 21:59:38,854 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 21:59:38,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:38,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 21:59:38,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-09-04 21:59:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-04 21:59:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2020-09-04 21:59:38,877 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 22 [2020-09-04 21:59:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:38,878 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2020-09-04 21:59:38,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2020-09-04 21:59:38,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 21:59:38,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:38,880 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 21:59:38,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 21:59:38,880 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:38,881 INFO L82 PathProgramCache]: Analyzing trace with hash 122238776, now seen corresponding path program 1 times [2020-09-04 21:59:38,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:38,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324829555] [2020-09-04 21:59:38,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 21:59:38,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324829555] [2020-09-04 21:59:38,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:38,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:38,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187813002] [2020-09-04 21:59:38,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:38,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:38,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:38,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:38,948 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 3 states. [2020-09-04 21:59:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:39,035 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2020-09-04 21:59:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:39,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-04 21:59:39,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:39,039 INFO L225 Difference]: With dead ends: 200 [2020-09-04 21:59:39,039 INFO L226 Difference]: Without dead ends: 136 [2020-09-04 21:59:39,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:39,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-04 21:59:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-09-04 21:59:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-04 21:59:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 166 transitions. [2020-09-04 21:59:39,066 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 166 transitions. Word has length 30 [2020-09-04 21:59:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:39,069 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 166 transitions. [2020-09-04 21:59:39,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 166 transitions. [2020-09-04 21:59:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 21:59:39,071 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:39,071 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-09-04 21:59:39,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 21:59:39,072 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:39,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:39,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1207592178, now seen corresponding path program 1 times [2020-09-04 21:59:39,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:39,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994109843] [2020-09-04 21:59:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:39,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-09-04 21:59:39,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994109843] [2020-09-04 21:59:39,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:39,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:39,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176302772] [2020-09-04 21:59:39,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:39,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:39,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:39,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:39,115 INFO L87 Difference]: Start difference. First operand 134 states and 166 transitions. Second operand 3 states. [2020-09-04 21:59:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:39,196 INFO L93 Difference]: Finished difference Result 248 states and 312 transitions. [2020-09-04 21:59:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:39,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-09-04 21:59:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:39,198 INFO L225 Difference]: With dead ends: 248 [2020-09-04 21:59:39,199 INFO L226 Difference]: Without dead ends: 103 [2020-09-04 21:59:39,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-04 21:59:39,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-09-04 21:59:39,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-04 21:59:39,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-09-04 21:59:39,217 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 34 [2020-09-04 21:59:39,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:39,218 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-09-04 21:59:39,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:39,218 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-09-04 21:59:39,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 21:59:39,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:59:39,220 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1] [2020-09-04 21:59:39,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 21:59:39,221 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:59:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:59:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 340924863, now seen corresponding path program 1 times [2020-09-04 21:59:39,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:59:39,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925608423] [2020-09-04 21:59:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:59:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:39,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:59:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:59:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-04 21:59:39,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925608423] [2020-09-04 21:59:39,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:59:39,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 21:59:39,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122199705] [2020-09-04 21:59:39,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 21:59:39,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:59:39,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 21:59:39,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:39,305 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 3 states. [2020-09-04 21:59:39,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:59:39,332 INFO L93 Difference]: Finished difference Result 157 states and 180 transitions. [2020-09-04 21:59:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 21:59:39,334 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-09-04 21:59:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:59:39,336 INFO L225 Difference]: With dead ends: 157 [2020-09-04 21:59:39,336 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 21:59:39,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 21:59:39,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 21:59:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 21:59:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 21:59:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 21:59:39,342 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2020-09-04 21:59:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:59:39,343 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 21:59:39,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 21:59:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 21:59:39,344 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 21:59:39,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 21:59:39,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 21:59:40,001 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 21:59:40,002 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 21:59:40,003 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 21:59:40,003 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 21:59:40,003 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 21:59:40,003 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 21:59:40,003 INFO L264 CegarLoopResult]: At program point L93(line 93) the Hoare annotation is: false [2020-09-04 21:59:40,004 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 8 140) the Hoare annotation is: true [2020-09-04 21:59:40,004 INFO L264 CegarLoopResult]: At program point L77-1(lines 53 106) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and .cse0 (not (= main_~s__hit~0 0))) (and .cse0 (<= main_~blastFlag~0 2)))) [2020-09-04 21:59:40,004 INFO L271 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: true [2020-09-04 21:59:40,004 INFO L264 CegarLoopResult]: At program point L69(lines 69 73) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,004 INFO L264 CegarLoopResult]: At program point L61(line 61) the Hoare annotation is: (or (and (<= main_~blastFlag~0 2) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 0)) [2020-09-04 21:59:40,005 INFO L264 CegarLoopResult]: At program point L78(line 78) the Hoare annotation is: (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) [2020-09-04 21:59:40,005 INFO L264 CegarLoopResult]: At program point L45(lines 45 110) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 21:59:40,005 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-09-04 21:59:40,005 INFO L271 CegarLoopResult]: At program point L136(lines 8 140) the Hoare annotation is: true [2020-09-04 21:59:40,005 INFO L264 CegarLoopResult]: At program point L70(line 70) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,006 INFO L264 CegarLoopResult]: At program point L95(lines 95 97) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-09-04 21:59:40,006 INFO L264 CegarLoopResult]: At program point L29(lines 29 124) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 21:59:40,006 INFO L264 CegarLoopResult]: At program point L46(lines 45 110) the Hoare annotation is: (let ((.cse0 (<= 8640 main_~s__state~0))) (or (and .cse0 (<= main_~blastFlag~0 2)) (and .cse0 (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))))) [2020-09-04 21:59:40,006 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 8 140) the Hoare annotation is: true [2020-09-04 21:59:40,006 INFO L264 CegarLoopResult]: At program point L96(lines 8 140) the Hoare annotation is: false [2020-09-04 21:59:40,007 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 138) the Hoare annotation is: false [2020-09-04 21:59:40,007 INFO L264 CegarLoopResult]: At program point L63(line 63) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,007 INFO L264 CegarLoopResult]: At program point L30(lines 29 124) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,007 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 8 140) the Hoare annotation is: true [2020-09-04 21:59:40,007 INFO L264 CegarLoopResult]: At program point L88-1(lines 53 106) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-09-04 21:59:40,008 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-09-04 21:59:40,008 INFO L264 CegarLoopResult]: At program point L72(line 72) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,008 INFO L264 CegarLoopResult]: At program point L89(line 89) the Hoare annotation is: (and (<= main_~blastFlag~0 2) (<= 8656 main_~s__state~0)) [2020-09-04 21:59:40,008 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-09-04 21:59:40,008 INFO L264 CegarLoopResult]: At program point L139(line 139) the Hoare annotation is: false [2020-09-04 21:59:40,009 INFO L264 CegarLoopResult]: At program point L24(lines 24 127) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 21:59:40,009 INFO L264 CegarLoopResult]: At program point L57-1(lines 53 106) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,009 INFO L264 CegarLoopResult]: At program point L49(lines 49 108) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 21:59:40,009 INFO L264 CegarLoopResult]: At program point L99(lines 17 134) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 21:59:40,009 INFO L264 CegarLoopResult]: At program point L58(line 58) the Hoare annotation is: (<= main_~blastFlag~0 0) [2020-09-04 21:59:40,010 INFO L264 CegarLoopResult]: At program point L25(lines 24 127) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,010 INFO L264 CegarLoopResult]: At program point L83(line 83) the Hoare annotation is: (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 2)) [2020-09-04 21:59:40,010 INFO L264 CegarLoopResult]: At program point L50(lines 49 108) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0)) .cse0) (and (<= main_~blastFlag~0 2) .cse0))) [2020-09-04 21:59:40,011 INFO L264 CegarLoopResult]: At program point L100(line 100) the Hoare annotation is: (let ((.cse0 (<= 8656 main_~s__state~0))) (or (and (<= main_~blastFlag~0 0) .cse0) (and (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0)) .cse0))) [2020-09-04 21:59:40,011 INFO L264 CegarLoopResult]: At program point L92-1(lines 53 106) the Hoare annotation is: (and (<= main_~blastFlag~0 3) (<= 8656 main_~s__state~0)) [2020-09-04 21:59:40,011 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (or (and (<= 8640 main_~s__state~0) (<= main_~blastFlag~0 3) (not (= main_~s__hit~0 0))) (<= main_~blastFlag~0 2)) [2020-09-04 21:59:40,011 INFO L271 CegarLoopResult]: At program point L10(line 10) the Hoare annotation is: true [2020-09-04 21:59:40,011 INFO L271 CegarLoopResult]: At program point L10-1(line 10) the Hoare annotation is: true [2020-09-04 21:59:40,012 INFO L271 CegarLoopResult]: At program point L10-2(line 10) the Hoare annotation is: true [2020-09-04 21:59:40,012 INFO L264 CegarLoopResult]: At program point L68(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,012 INFO L264 CegarLoopResult]: At program point L68-1(line 68) the Hoare annotation is: (<= main_~blastFlag~0 2) [2020-09-04 21:59:40,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 09:59:40 BoogieIcfgContainer [2020-09-04 21:59:40,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 21:59:40,046 INFO L168 Benchmark]: Toolchain (without parser) took 3069.91 ms. Allocated memory was 139.5 MB in the beginning and 231.2 MB in the end (delta: 91.8 MB). Free memory was 101.6 MB in the beginning and 112.6 MB in the end (delta: -11.1 MB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. [2020-09-04 21:59:40,047 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 21:59:40,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 344.21 ms. Allocated memory is still 139.5 MB. Free memory was 101.4 MB in the beginning and 91.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-04 21:59:40,056 INFO L168 Benchmark]: Boogie Preprocessor took 133.71 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 91.1 MB in the beginning and 179.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-04 21:59:40,058 INFO L168 Benchmark]: RCFGBuilder took 403.96 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 162.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2020-09-04 21:59:40,059 INFO L168 Benchmark]: TraceAbstraction took 2178.58 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 162.6 MB in the beginning and 112.6 MB in the end (delta: 49.9 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. [2020-09-04 21:59:40,067 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 139.5 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 344.21 ms. Allocated memory is still 139.5 MB. Free memory was 101.4 MB in the beginning and 91.1 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.71 ms. Allocated memory was 139.5 MB in the beginning and 200.8 MB in the end (delta: 61.3 MB). Free memory was 91.1 MB in the beginning and 179.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 403.96 ms. Allocated memory is still 200.8 MB. Free memory was 178.7 MB in the beginning and 162.6 MB in the end (delta: 16.2 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2178.58 ms. Allocated memory was 200.8 MB in the beginning and 231.2 MB in the end (delta: 30.4 MB). Free memory was 162.6 MB in the beginning and 112.6 MB in the end (delta: 49.9 MB). Peak memory consumption was 80.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 138]: 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: 49]: Loop Invariant Derived loop invariant: ((blastFlag <= 3 && !(s__hit == 0)) && 8656 <= s__state) || (blastFlag <= 2 && 8656 <= s__state) - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) || blastFlag <= 2 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: (8640 <= s__state && blastFlag <= 2) || ((8640 <= s__state && blastFlag <= 3) && !(s__hit == 0)) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: blastFlag <= 2 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - ProcedureContractResult [Line: 8]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.3s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 295 SDtfs, 129 SDslu, 194 SDs, 0 SdLazy, 106 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred 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: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 48 LocationsWithAnnotation, 48 PreInvPairs, 162 NumberOfFragments, 272 HoareAnnotationTreeSize, 48 FomulaSimplifications, 975 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 48 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 173 NumberOfCodeBlocks, 173 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 9052 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 42/42 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...