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/test09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:28:35,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:28:35,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:28:35,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:28:35,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:28:35,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:28:35,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:28:35,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:28:35,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:28:35,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:28:35,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:28:35,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:28:35,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:28:35,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:28:35,906 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:28:35,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:28:35,909 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:28:35,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:28:35,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:28:35,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:28:35,919 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 13:28:35,935 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:28:35,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:28:35,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:28:35,936 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:28:35,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:28:35,937 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:28:35,937 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:28:35,940 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:28:35,940 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:28:35,940 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:28:35,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:28:35,942 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:28:35,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:28:35,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:28:35,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:28:35,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:28:35,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:28:35,944 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:28:35,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:28:35,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:28:35,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:28:35,944 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:28:35,945 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:28:35,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:28:35,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:28:35,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:28:35,946 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:28:35,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:28:35,946 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:28:35,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:28:35,995 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:28:36,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:28:36,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:28:36,013 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:28:36,013 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:28:36,014 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test09.c [2019-09-20 13:28:36,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1170f94d5/6a28df92a72344cc9e4166d0a510058a/FLAGebd117993 [2019-09-20 13:28:36,523 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:28:36,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test09.c [2019-09-20 13:28:36,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1170f94d5/6a28df92a72344cc9e4166d0a510058a/FLAGebd117993 [2019-09-20 13:28:36,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1170f94d5/6a28df92a72344cc9e4166d0a510058a [2019-09-20 13:28:36,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:28:36,929 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:28:36,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:36,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:28:36,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:28:36,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:36" (1/1) ... [2019-09-20 13:28:36,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d5a5d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:36, skipping insertion in model container [2019-09-20 13:28:36,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:28:36" (1/1) ... [2019-09-20 13:28:36,945 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:28:36,960 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:28:37,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:37,148 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:28:37,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:28:37,176 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:28:37,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37 WrapperNode [2019-09-20 13:28:37,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:28:37,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:28:37,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:28:37,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:28:37,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (1/1) ... [2019-09-20 13:28:37,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (1/1) ... [2019-09-20 13:28:37,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (1/1) ... [2019-09-20 13:28:37,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (1/1) ... [2019-09-20 13:28:37,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (1/1) ... [2019-09-20 13:28:37,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (1/1) ... [2019-09-20 13:28:37,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (1/1) ... [2019-09-20 13:28:37,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:28:37,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:28:37,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:28:37,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:28:37,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (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 13:28:37,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:28:37,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:28:37,345 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-09-20 13:28:37,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:28:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:28:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-09-20 13:28:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:28:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:28:37,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:28:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:28:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:28:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-20 13:28:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:28:37,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:28:37,552 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:28:37,552 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-20 13:28:37,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:37 BoogieIcfgContainer [2019-09-20 13:28:37,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:28:37,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:28:37,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:28:37,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:28:37,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:28:36" (1/3) ... [2019-09-20 13:28:37,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470e9c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:37, skipping insertion in model container [2019-09-20 13:28:37,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:28:37" (2/3) ... [2019-09-20 13:28:37,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@470e9c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:28:37, skipping insertion in model container [2019-09-20 13:28:37,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:28:37" (3/3) ... [2019-09-20 13:28:37,562 INFO L109 eAbstractionObserver]: Analyzing ICFG test09.c [2019-09-20 13:28:37,573 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:28:37,581 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:28:37,599 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:28:37,648 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:28:37,648 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:28:37,649 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:28:37,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:28:37,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:28:37,649 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:28:37,649 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:28:37,650 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:28:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 13:28:37,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 13:28:37,679 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:37,680 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:37,682 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:37,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1889415219, now seen corresponding path program 1 times [2019-09-20 13:28:37,692 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:37,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:37,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:37,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:37,753 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:37,954 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 13:28:37,957 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:28:37,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:28:37,958 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:37,962 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:28:37,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:28:37,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:28:37,984 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2019-09-20 13:28:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:38,062 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2019-09-20 13:28:38,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:28:38,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-09-20 13:28:38,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:38,076 INFO L225 Difference]: With dead ends: 27 [2019-09-20 13:28:38,077 INFO L226 Difference]: Without dead ends: 15 [2019-09-20 13:28:38,079 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:28:38,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-20 13:28:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-20 13:28:38,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-20 13:28:38,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2019-09-20 13:28:38,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2019-09-20 13:28:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:38,124 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2019-09-20 13:28:38,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:28:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2019-09-20 13:28:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 13:28:38,126 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:28:38,126 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:28:38,126 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:28:38,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:28:38,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1918044370, now seen corresponding path program 1 times [2019-09-20 13:28:38,127 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:28:38,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:38,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:28:38,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:28:38,130 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:28:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:28:38,579 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 13:28:38,580 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:28:38,580 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:28:38,581 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:28:38,582 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:28:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:28:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:28:38,583 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 7 states. [2019-09-20 13:28:38,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:28:38,759 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2019-09-20 13:28:38,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 13:28:38,760 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-09-20 13:28:38,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:28:38,761 INFO L225 Difference]: With dead ends: 9 [2019-09-20 13:28:38,761 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:28:38,762 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:28:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:28:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:28:38,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:28:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:28:38,764 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2019-09-20 13:28:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:28:38,764 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:28:38,764 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:28:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:28:38,765 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:28:38,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:28:38 BoogieIcfgContainer [2019-09-20 13:28:38,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:28:38,774 INFO L168 Benchmark]: Toolchain (without parser) took 1843.65 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 86.3 MB in the beginning and 86.7 MB in the end (delta: -438.4 kB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:38,775 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:28:38,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.07 ms. Allocated memory is still 138.9 MB. Free memory was 86.1 MB in the beginning and 76.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:38,777 INFO L168 Benchmark]: Boogie Preprocessor took 115.92 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 76.3 MB in the beginning and 177.1 MB in the end (delta: -100.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:38,778 INFO L168 Benchmark]: RCFGBuilder took 260.03 ms. Allocated memory is still 199.8 MB. Free memory was 176.5 MB in the beginning and 162.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:38,779 INFO L168 Benchmark]: TraceAbstraction took 1216.37 ms. Allocated memory is still 199.8 MB. Free memory was 162.1 MB in the beginning and 86.7 MB in the end (delta: 75.3 MB). Peak memory consumption was 75.3 MB. Max. memory is 7.1 GB. [2019-09-20 13:28:38,784 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 138.9 MB. Free memory was 104.9 MB in the beginning and 104.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.07 ms. Allocated memory is still 138.9 MB. Free memory was 86.1 MB in the beginning and 76.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.92 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 76.3 MB in the beginning and 177.1 MB in the end (delta: -100.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 260.03 ms. Allocated memory is still 199.8 MB. Free memory was 176.5 MB in the beginning and 162.7 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1216.37 ms. Allocated memory is still 199.8 MB. Free memory was 162.1 MB in the beginning and 86.7 MB in the end (delta: 75.3 MB). Peak memory consumption was 75.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 37]: 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, 19 locations, 1 error locations. SAFE Result, 1.1s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 23 SDtfs, 10 SDslu, 33 SDs, 0 SdLazy, 22 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 3835 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...