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/test23-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:46:24,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:46:24,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:46:24,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:46:24,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:46:24,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:46:24,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:46:24,114 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 [2019-09-10 01:46:24,139 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:46:24,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:46:24,141 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:46:24,141 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:46:24,142 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:46:24,142 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:46:24,142 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:46:24,142 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:46:24,143 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:46:24,143 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:46:24,143 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:46:24,144 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:46:24,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:46:24,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:46:24,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:46:24,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:46:24,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:46:24,145 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:46:24,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:46:24,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:46:24,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:46:24,146 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:46:24,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:46:24,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:46:24,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:46:24,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:46:24,147 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:46:24,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:46:24,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:46:24,147 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:46:24,177 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:46:24,195 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:46:24,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:46:24,203 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:46:24,204 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:46:24,205 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-1.c [2019-09-10 01:46:24,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8723a2cc6/108e5011405d4e808f7ecda58cb27542/FLAGa676b6ac0 [2019-09-10 01:46:24,728 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:46:24,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test23-1.c [2019-09-10 01:46:24,737 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8723a2cc6/108e5011405d4e808f7ecda58cb27542/FLAGa676b6ac0 [2019-09-10 01:46:25,111 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8723a2cc6/108e5011405d4e808f7ecda58cb27542 [2019-09-10 01:46:25,122 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:46:25,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:46:25,124 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:25,124 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:46:25,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:46:25,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,132 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217e5868 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25, skipping insertion in model container [2019-09-10 01:46:25,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,140 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:46:25,163 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:46:25,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:25,461 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:46:25,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:25,599 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:46:25,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25 WrapperNode [2019-09-10 01:46:25,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:25,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:46:25,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:46:25,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:46:25,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,622 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (1/1) ... [2019-09-10 01:46:25,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:46:25,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:46:25,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:46:25,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:46:25,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (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 [2019-09-10 01:46:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:46:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:46:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-09-10 01:46:25,713 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2019-09-10 01:46:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-10 01:46:25,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:46:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:46:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 01:46:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-10 01:46:25,714 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-09-10 01:46:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-10 01:46:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2019-09-10 01:46:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-10 01:46:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-10 01:46:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:46:25,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:46:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-10 01:46:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-10 01:46:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:46:25,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-10 01:46:26,085 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:46:26,085 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 01:46:26,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:26 BoogieIcfgContainer [2019-09-10 01:46:26,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:46:26,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:46:26,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:46:26,091 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:46:26,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:46:25" (1/3) ... [2019-09-10 01:46:26,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274fd11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:26, skipping insertion in model container [2019-09-10 01:46:26,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:25" (2/3) ... [2019-09-10 01:46:26,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@274fd11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:26, skipping insertion in model container [2019-09-10 01:46:26,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:26" (3/3) ... [2019-09-10 01:46:26,094 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-1.c [2019-09-10 01:46:26,102 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:46:26,110 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:46:26,126 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:46:26,151 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:46:26,151 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:46:26,151 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:46:26,151 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:46:26,151 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:46:26,151 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:46:26,152 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:46:26,152 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:46:26,164 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-10 01:46:26,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-10 01:46:26,173 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:26,174 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:26,176 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:26,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:26,181 INFO L82 PathProgramCache]: Analyzing trace with hash -128514638, now seen corresponding path program 1 times [2019-09-10 01:46:26,183 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:26,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:26,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:26,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:26,226 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 01:46:26,428 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:46:26,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 01:46:26,429 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:26,435 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:46:26,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:46:26,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:26,455 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-09-10 01:46:26,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:26,479 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-10 01:46:26,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:46:26,481 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2019-09-10 01:46:26,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:26,493 INFO L225 Difference]: With dead ends: 33 [2019-09-10 01:46:26,493 INFO L226 Difference]: Without dead ends: 28 [2019-09-10 01:46:26,497 INFO L628 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 [2019-09-10 01:46:26,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-10 01:46:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-10 01:46:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-10 01:46:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-09-10 01:46:26,555 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 30 [2019-09-10 01:46:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:26,559 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-09-10 01:46:26,559 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:46:26,559 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-09-10 01:46:26,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-10 01:46:26,561 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:26,562 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:26,562 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:26,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:26,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1246729484, now seen corresponding path program 1 times [2019-09-10 01:46:26,564 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:26,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:26,565 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:26,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:26,566 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:27,842 WARN L188 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 86 [2019-09-10 01:46:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:46:27,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:46:27,950 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:46:27,952 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-09-10 01:46:27,955 INFO L207 CegarAbsIntRunner]: [0], [1], [4], [6], [9], [14], [17], [24], [27], [34], [37], [38], [39], [40], [43], [47], [48], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62] [2019-09-10 01:46:28,001 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:46:28,001 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:46:28,086 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:46:28,088 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 13 root evaluator evaluations with a maximum evaluation depth of 0. Performed 13 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 20 variables. [2019-09-10 01:46:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:28,092 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:46:28,127 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-10 01:46:28,128 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:46:28,131 INFO L420 sIntCurrentIteration]: We unified 30 AI predicates to 30 [2019-09-10 01:46:28,132 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:46:28,134 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:46:28,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [14] total 14 [2019-09-10 01:46:28,134 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:28,136 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:46:28,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:46:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:28,137 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 2 states. [2019-09-10 01:46:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:28,137 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-10 01:46:28,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:46:28,138 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 31 [2019-09-10 01:46:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:28,138 INFO L225 Difference]: With dead ends: 2 [2019-09-10 01:46:28,138 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:46:28,139 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:28,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:46:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:46:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:46:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:46:28,142 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-09-10 01:46:28,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:28,142 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:46:28,143 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:46:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:46:28,143 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:46:28,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:46:28 BoogieIcfgContainer [2019-09-10 01:46:28,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:46:28,152 INFO L168 Benchmark]: Toolchain (without parser) took 3026.70 ms. Allocated memory was 132.1 MB in the beginning and 220.7 MB in the end (delta: 88.6 MB). Free memory was 87.8 MB in the beginning and 125.5 MB in the end (delta: -37.7 MB). Peak memory consumption was 50.9 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:28,154 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:46:28,159 INFO L168 Benchmark]: CACSL2BoogieTranslator took 476.08 ms. Allocated memory was 132.1 MB in the beginning and 197.7 MB in the end (delta: 65.5 MB). Free memory was 87.6 MB in the beginning and 173.4 MB in the end (delta: -85.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:28,161 INFO L168 Benchmark]: Boogie Preprocessor took 52.32 ms. Allocated memory is still 197.7 MB. Free memory was 173.4 MB in the beginning and 170.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:28,162 INFO L168 Benchmark]: RCFGBuilder took 434.14 ms. Allocated memory is still 197.7 MB. Free memory was 170.9 MB in the beginning and 153.2 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:28,164 INFO L168 Benchmark]: TraceAbstraction took 2060.61 ms. Allocated memory was 197.7 MB in the beginning and 220.7 MB in the end (delta: 23.1 MB). Free memory was 152.6 MB in the beginning and 125.5 MB in the end (delta: 27.1 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:28,176 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory was 106.6 MB in the beginning and 106.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 476.08 ms. Allocated memory was 132.1 MB in the beginning and 197.7 MB in the end (delta: 65.5 MB). Free memory was 87.6 MB in the beginning and 173.4 MB in the end (delta: -85.8 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.32 ms. Allocated memory is still 197.7 MB. Free memory was 173.4 MB in the beginning and 170.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 434.14 ms. Allocated memory is still 197.7 MB. Free memory was 170.9 MB in the beginning and 153.2 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2060.61 ms. Allocated memory was 197.7 MB in the beginning and 220.7 MB in the end (delta: 23.1 MB). Free memory was 152.6 MB in the beginning and 125.5 MB in the end (delta: 27.1 MB). Peak memory consumption was 50.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: 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 6 procedures, 33 locations, 1 error locations. SAFE Result, 2.0s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 1.0 AbsIntWeakeningRatio, 1.2666666666666666 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 59 ConstructedInterpolants, 0 QuantifiedInterpolants, 11461 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 5/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...