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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 17:06:55,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 17:06:55,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 17:06:55,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-16 17:06:55,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-16 17:06:55,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-16 17:06:55,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-16 17:06:55,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-16 17:06:55,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-16 17:06:55,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-16 17:06:55,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-16 17:06:55,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-16 17:06:55,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 17:06:55,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 17:06:55,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 17:06:55,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 17:06:55,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 17:06:55,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 17:06:55,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 17:06:55,343 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 17:06:55,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 17:06:55,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 17:06:55,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 17:06:55,354 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 17:06:55,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 17:06:55,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-16 17:06:55,392 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 17:06:55,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 17:06:55,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-16 17:06:55,393 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-16 17:06:55,394 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-16 17:06:55,394 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-16 17:06:55,394 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-16 17:06:55,395 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-16 17:06:55,395 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-16 17:06:55,395 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-16 17:06:55,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 17:06:55,397 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 17:06:55,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 17:06:55,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 17:06:55,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 17:06:55,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 17:06:55,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 17:06:55,398 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 17:06:55,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 17:06:55,399 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 17:06:55,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 17:06:55,399 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-16 17:06:55,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 17:06:55,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:06:55,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 17:06:55,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 17:06:55,400 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-16 17:06:55,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 17:06:55,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 17:06:55,401 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-16 17:06:55,452 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 17:06:55,469 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 17:06:55,473 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 17:06:55,474 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 17:06:55,475 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 17:06:55,476 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2019-09-16 17:06:55,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86196a2ed/2348e762c553451fbcf1e6e3d0d836bc/FLAGf1ae7123b [2019-09-16 17:06:55,951 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 17:06:55,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2019-09-16 17:06:55,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86196a2ed/2348e762c553451fbcf1e6e3d0d836bc/FLAGf1ae7123b [2019-09-16 17:06:56,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86196a2ed/2348e762c553451fbcf1e6e3d0d836bc [2019-09-16 17:06:56,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 17:06:56,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 17:06:56,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 17:06:56,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 17:06:56,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 17:06:56,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6712ea0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56, skipping insertion in model container [2019-09-16 17:06:56,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,407 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 17:06:56,423 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 17:06:56,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:06:56,631 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 17:06:56,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 17:06:56,660 INFO L192 MainTranslator]: Completed translation [2019-09-16 17:06:56,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56 WrapperNode [2019-09-16 17:06:56,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 17:06:56,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 17:06:56,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 17:06:56,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 17:06:56,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,790 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... [2019-09-16 17:06:56,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 17:06:56,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 17:06:56,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 17:06:56,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 17:06:56,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 17:06:56,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 17:06:56,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 17:06:56,849 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 17:06:56,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 17:06:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-16 17:06:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 17:06:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-16 17:06:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-16 17:06:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-16 17:06:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-16 17:06:56,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 17:06:56,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 17:06:57,039 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 17:06:57,040 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-16 17:06:57,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:06:57 BoogieIcfgContainer [2019-09-16 17:06:57,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 17:06:57,047 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 17:06:57,047 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 17:06:57,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 17:06:57,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 05:06:56" (1/3) ... [2019-09-16 17:06:57,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36392073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:06:57, skipping insertion in model container [2019-09-16 17:06:57,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 05:06:56" (2/3) ... [2019-09-16 17:06:57,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36392073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 05:06:57, skipping insertion in model container [2019-09-16 17:06:57,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 05:06:57" (3/3) ... [2019-09-16 17:06:57,054 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-2.c [2019-09-16 17:06:57,069 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 17:06:57,076 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 17:06:57,089 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 17:06:57,110 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 17:06:57,110 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-16 17:06:57,110 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 17:06:57,110 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 17:06:57,111 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 17:06:57,111 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 17:06:57,111 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 17:06:57,111 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 17:06:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-16 17:06:57,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:06:57,131 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:06:57,131 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:06:57,133 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:06:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:06:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2019-09-16 17:06:57,139 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:06:57,186 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:06:57,187 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:06:57,187 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:06:57,187 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:06:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:06:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:06:57,340 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:06:57,340 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-16 17:06:57,340 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:06:57,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-16 17:06:57,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-16 17:06:57,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:06:57,382 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-09-16 17:06:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:06:57,476 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2019-09-16 17:06:57,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-16 17:06:57,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-09-16 17:06:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:06:57,487 INFO L225 Difference]: With dead ends: 25 [2019-09-16 17:06:57,488 INFO L226 Difference]: Without dead ends: 21 [2019-09-16 17:06:57,490 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-16 17:06:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-16 17:06:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-09-16 17:06:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-16 17:06:57,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-16 17:06:57,524 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2019-09-16 17:06:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:06:57,525 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-16 17:06:57,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-16 17:06:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-16 17:06:57,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:06:57,527 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:06:57,527 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:06:57,527 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:06:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:06:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2019-09-16 17:06:57,528 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:06:57,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:06:57,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:06:57,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:06:57,531 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:06:57,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:06:57,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:06:57,632 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:06:57,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-16 17:06:57,633 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:06:57,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-16 17:06:57,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-16 17:06:57,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-16 17:06:57,636 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2019-09-16 17:06:57,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:06:57,728 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-16 17:06:57,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:06:57,729 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-16 17:06:57,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:06:57,730 INFO L225 Difference]: With dead ends: 20 [2019-09-16 17:06:57,730 INFO L226 Difference]: Without dead ends: 14 [2019-09-16 17:06:57,731 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-09-16 17:06:57,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-16 17:06:57,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-16 17:06:57,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 17:06:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2019-09-16 17:06:57,734 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2019-09-16 17:06:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:06:57,735 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2019-09-16 17:06:57,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-16 17:06:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2019-09-16 17:06:57,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-16 17:06:57,736 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 17:06:57,736 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 17:06:57,736 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 17:06:57,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 17:06:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2019-09-16 17:06:57,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-16 17:06:57,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:06:57,739 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 17:06:57,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 17:06:57,739 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-16 17:06:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 17:06:57,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 17:06:57,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 17:06:57,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-16 17:06:57,918 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-16 17:06:57,918 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 17:06:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 17:06:57,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-16 17:06:57,919 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 8 states. [2019-09-16 17:06:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 17:06:58,006 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2019-09-16 17:06:58,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 17:06:58,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-09-16 17:06:58,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 17:06:58,007 INFO L225 Difference]: With dead ends: 12 [2019-09-16 17:06:58,007 INFO L226 Difference]: Without dead ends: 0 [2019-09-16 17:06:58,008 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-09-16 17:06:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-16 17:06:58,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-16 17:06:58,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-16 17:06:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-16 17:06:58,009 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2019-09-16 17:06:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 17:06:58,009 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-16 17:06:58,010 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 17:06:58,010 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-16 17:06:58,010 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-16 17:06:58,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 05:06:58 BoogieIcfgContainer [2019-09-16 17:06:58,015 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 17:06:58,018 INFO L168 Benchmark]: Toolchain (without parser) took 1626.22 ms. Allocated memory was 136.8 MB in the beginning and 197.1 MB in the end (delta: 60.3 MB). Free memory was 83.9 MB in the beginning and 95.0 MB in the end (delta: -11.0 MB). Peak memory consumption was 49.3 MB. Max. memory is 7.1 GB. [2019-09-16 17:06:58,019 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 102.7 MB in the beginning and 102.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 17:06:58,020 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.29 ms. Allocated memory was 136.8 MB in the beginning and 197.1 MB in the end (delta: 60.3 MB). Free memory was 83.7 MB in the beginning and 176.7 MB in the end (delta: -93.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2019-09-16 17:06:58,021 INFO L168 Benchmark]: Boogie Preprocessor took 40.36 ms. Allocated memory is still 197.1 MB. Free memory was 175.6 MB in the beginning and 174.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2019-09-16 17:06:58,022 INFO L168 Benchmark]: RCFGBuilder took 245.71 ms. Allocated memory is still 197.1 MB. Free memory was 174.3 MB in the beginning and 160.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2019-09-16 17:06:58,023 INFO L168 Benchmark]: TraceAbstraction took 968.09 ms. Allocated memory is still 197.1 MB. Free memory was 160.0 MB in the beginning and 95.0 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. [2019-09-16 17:06:58,027 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.8 MB. Free memory was 102.7 MB in the beginning and 102.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 363.29 ms. Allocated memory was 136.8 MB in the beginning and 197.1 MB in the end (delta: 60.3 MB). Free memory was 83.7 MB in the beginning and 176.7 MB in the end (delta: -93.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 40.36 ms. Allocated memory is still 197.1 MB. Free memory was 175.6 MB in the beginning and 174.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.71 ms. Allocated memory is still 197.1 MB. Free memory was 174.3 MB in the beginning and 160.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 968.09 ms. Allocated memory is still 197.1 MB. Free memory was 160.0 MB in the beginning and 95.0 MB in the end (delta: 65.0 MB). Peak memory consumption was 65.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 32 SDslu, 71 SDs, 0 SdLazy, 75 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...