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/loops/nec40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:07,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:07,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:07,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:25:07,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:25:07,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:25:07,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:25:07,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:25:07,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:25:07,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:25:07,457 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:25:07,458 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:25:07,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:07,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:07,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:07,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:07,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:07,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:07,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:07,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:07,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:07,484 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:07,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:07,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:07,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:25:07,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:07,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:07,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:07,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:07,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:07,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:07,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:07,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:07,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:07,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:07,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:07,507 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 [2019-09-20 13:25:07,523 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:07,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:07,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:07,524 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:07,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:07,525 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:07,525 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:07,525 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:07,526 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:07,526 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:07,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:07,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:07,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:07,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:07,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:07,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:07,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:07,528 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:07,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:07,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:07,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:07,529 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:07,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:07,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:07,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:07,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:07,530 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:07,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:07,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:07,531 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:07,584 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:07,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:07,608 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:07,610 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:07,611 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:07,612 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec40.c [2019-09-20 13:25:07,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a37a2c2/c48778bdd7ed4474a941cf6d5069e293/FLAG95de470a6 [2019-09-20 13:25:08,168 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:08,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec40.c [2019-09-20 13:25:08,178 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a37a2c2/c48778bdd7ed4474a941cf6d5069e293/FLAG95de470a6 [2019-09-20 13:25:08,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4a37a2c2/c48778bdd7ed4474a941cf6d5069e293 [2019-09-20 13:25:08,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:08,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:08,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:08,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:08,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:08,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:08,559 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b3f85b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08, skipping insertion in model container [2019-09-20 13:25:08,559 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:08,567 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:08,586 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:08,762 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:08,791 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:08,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:08,950 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:08,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08 WrapperNode [2019-09-20 13:25:08,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:08,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:08,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:08,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:08,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:08,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:08,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:08,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:08,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:09,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:09,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (1/1) ... [2019-09-20 13:25:09,011 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:09,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:09,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:09,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:09,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (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 [2019-09-20 13:25:09,081 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:09,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:09,082 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:09,082 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:09,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:25:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:25:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:09,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:25:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:25:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:09,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:25:09,565 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:09,565 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 13:25:09,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:09 BoogieIcfgContainer [2019-09-20 13:25:09,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:09,573 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:09,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:09,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:09,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:08" (1/3) ... [2019-09-20 13:25:09,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3c7d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:09, skipping insertion in model container [2019-09-20 13:25:09,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:08" (2/3) ... [2019-09-20 13:25:09,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3c7d7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:09, skipping insertion in model container [2019-09-20 13:25:09,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:09" (3/3) ... [2019-09-20 13:25:09,585 INFO L109 eAbstractionObserver]: Analyzing ICFG nec40.c [2019-09-20 13:25:09,593 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:09,603 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:09,621 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:09,649 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:09,649 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:09,649 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:09,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:09,650 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:09,650 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:09,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:09,650 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-20 13:25:09,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 13:25:09,673 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:09,674 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:09,675 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -91485938, now seen corresponding path program 1 times [2019-09-20 13:25:09,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:09,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:09,735 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:09,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:09,736 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:09,980 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:09,980 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:25:09,982 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:09,988 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:10,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:10,008 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2019-09-20 13:25:10,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:10,028 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-20 13:25:10,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:10,030 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-20 13:25:10,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:10,038 INFO L225 Difference]: With dead ends: 23 [2019-09-20 13:25:10,038 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 13:25:10,041 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:10,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 13:25:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-20 13:25:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 13:25:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-20 13:25:10,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-09-20 13:25:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:10,082 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-20 13:25:10,083 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:10,083 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-20 13:25:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 13:25:10,084 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:10,084 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:10,084 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 883179888, now seen corresponding path program 1 times [2019-09-20 13:25:10,085 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:10,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,088 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:10,088 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,088 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:10,234 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:10,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:25:10,234 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:10,236 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:25:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:25:10,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:10,237 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2019-09-20 13:25:10,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:10,292 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-09-20 13:25:10,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:25:10,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-20 13:25:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:10,296 INFO L225 Difference]: With dead ends: 20 [2019-09-20 13:25:10,296 INFO L226 Difference]: Without dead ends: 18 [2019-09-20 13:25:10,297 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-20 13:25:10,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-20 13:25:10,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-20 13:25:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-09-20 13:25:10,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2019-09-20 13:25:10,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:10,305 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-09-20 13:25:10,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:25:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-09-20 13:25:10,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-20 13:25:10,306 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:10,306 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:10,307 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:10,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:10,308 INFO L82 PathProgramCache]: Analyzing trace with hash 975532875, now seen corresponding path program 1 times [2019-09-20 13:25:10,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:10,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:10,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,316 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:10,564 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:10,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:10,570 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:10,570 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:10,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:10,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:10,571 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 5 states. [2019-09-20 13:25:10,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:10,622 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2019-09-20 13:25:10,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:25:10,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-09-20 13:25:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:10,623 INFO L225 Difference]: With dead ends: 8 [2019-09-20 13:25:10,623 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:10,623 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-09-20 13:25:10,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:10,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:10,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:10,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:10,625 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2019-09-20 13:25:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:10,625 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:10,625 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:10,626 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:10,626 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:10,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:10 BoogieIcfgContainer [2019-09-20 13:25:10,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:10,634 INFO L168 Benchmark]: Toolchain (without parser) took 2083.41 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 88.1 MB in the beginning and 86.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 68.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:10,636 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 106.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:10,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.25 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 87.9 MB in the beginning and 173.4 MB in the end (delta: -85.5 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:10,639 INFO L168 Benchmark]: Boogie Preprocessor took 59.17 ms. Allocated memory is still 198.7 MB. Free memory was 173.4 MB in the beginning and 170.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:10,640 INFO L168 Benchmark]: RCFGBuilder took 555.65 ms. Allocated memory is still 198.7 MB. Free memory was 170.3 MB in the beginning and 148.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:10,641 INFO L168 Benchmark]: TraceAbstraction took 1058.36 ms. Allocated memory is still 198.7 MB. Free memory was 147.7 MB in the beginning and 86.5 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:10,644 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 132.1 MB. Free memory was 106.3 MB in the beginning and 106.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 400.25 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 87.9 MB in the beginning and 173.4 MB in the end (delta: -85.5 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 59.17 ms. Allocated memory is still 198.7 MB. Free memory was 173.4 MB in the beginning and 170.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 555.65 ms. Allocated memory is still 198.7 MB. Free memory was 170.3 MB in the beginning and 148.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1058.36 ms. Allocated memory is still 198.7 MB. Free memory was 147.7 MB in the beginning and 86.5 MB in the end (delta: 61.2 MB). Peak memory consumption was 61.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 44 SDtfs, 9 SDslu, 10 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 1757 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...