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/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:08:09,473 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:08:09,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:08:09,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 13:08:09,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 13:08:09,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 13:08:09,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 13:08:09,523 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 [2019-09-05 13:08:09,539 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:08:09,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:08:09,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:08:09,539 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:08:09,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:08:09,540 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:08:09,541 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:08:09,541 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:08:09,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:08:09,541 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:08:09,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:08:09,542 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:08:09,542 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:08:09,542 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:08:09,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:08:09,543 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:08:09,543 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:08:09,543 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:08:09,543 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:08:09,544 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:08:09,544 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:08:09,544 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:08:09,544 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:08:09,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:08:09,545 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:08:09,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:08:09,545 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:08:09,545 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:08:09,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:08:09,546 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:08:09,573 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:08:09,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:08:09,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:08:09,591 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:08:09,592 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:08:09,592 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2019-09-05 13:08:09,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99d1b712/8db337629ac5496ab465007fccabba22/FLAGfa8544190 [2019-09-05 13:08:10,173 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:08:10,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lhb-reducer.c [2019-09-05 13:08:10,198 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99d1b712/8db337629ac5496ab465007fccabba22/FLAGfa8544190 [2019-09-05 13:08:10,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b99d1b712/8db337629ac5496ab465007fccabba22 [2019-09-05 13:08:10,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:08:10,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:08:10,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:08:10,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:08:10,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:08:10,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:08:10" (1/1) ... [2019-09-05 13:08:10,508 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62472ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:10, skipping insertion in model container [2019-09-05 13:08:10,509 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:08:10" (1/1) ... [2019-09-05 13:08:10,515 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:08:10,566 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:08:10,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:08:10,985 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:08:11,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:08:11,156 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:08:11,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11 WrapperNode [2019-09-05 13:08:11,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:08:11,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:08:11,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:08:11,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:08:11,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (1/1) ... [2019-09-05 13:08:11,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (1/1) ... [2019-09-05 13:08:11,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (1/1) ... [2019-09-05 13:08:11,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (1/1) ... [2019-09-05 13:08:11,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (1/1) ... [2019-09-05 13:08:11,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (1/1) ... [2019-09-05 13:08:11,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (1/1) ... [2019-09-05 13:08:11,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:08:11,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:08:11,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:08:11,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:08:11,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (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 [2019-09-05 13:08:11,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:08:11,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:08:11,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:08:11,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:08:11,355 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2019-09-05 13:08:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2019-09-05 13:08:11,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:08:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:08:11,358 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-05 13:08:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-05 13:08:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-09-05 13:08:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-05 13:08:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-05 13:08:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:08:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-05 13:08:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-09-05 13:08:12,462 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:08:12,463 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-05 13:08:12,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:08:12 BoogieIcfgContainer [2019-09-05 13:08:12,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:08:12,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:08:12,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:08:12,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:08:12,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:08:10" (1/3) ... [2019-09-05 13:08:12,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8199d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:08:12, skipping insertion in model container [2019-09-05 13:08:12,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:08:11" (2/3) ... [2019-09-05 13:08:12,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b8199d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:08:12, skipping insertion in model container [2019-09-05 13:08:12,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:08:12" (3/3) ... [2019-09-05 13:08:12,472 INFO L109 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lhb-reducer.c [2019-09-05 13:08:12,482 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:08:12,490 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:08:12,504 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:08:12,527 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:08:12,527 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:08:12,528 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:08:12,528 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:08:12,528 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:08:12,528 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:08:12,528 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:08:12,529 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:08:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2019-09-05 13:08:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-09-05 13:08:12,556 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:08:12,557 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:08:12,559 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:08:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:08:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash 377540282, now seen corresponding path program 1 times [2019-09-05 13:08:12,567 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:08:12,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:08:12,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:08:12,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:08:12,611 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:08:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:08:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:08:13,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:08:13,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2019-09-05 13:08:13,519 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:08:13,525 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-05 13:08:13,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-05 13:08:13,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2019-09-05 13:08:13,545 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 19 states. [2019-09-05 13:08:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:08:14,760 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2019-09-05 13:08:14,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-05 13:08:14,764 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2019-09-05 13:08:14,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:08:14,775 INFO L225 Difference]: With dead ends: 85 [2019-09-05 13:08:14,776 INFO L226 Difference]: Without dead ends: 57 [2019-09-05 13:08:14,779 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2019-09-05 13:08:14,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-05 13:08:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-09-05 13:08:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-05 13:08:14,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2019-09-05 13:08:14,823 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 48 [2019-09-05 13:08:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:08:14,824 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2019-09-05 13:08:14,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-05 13:08:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2019-09-05 13:08:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-09-05 13:08:14,826 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:08:14,826 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:08:14,827 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:08:14,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:08:14,827 INFO L82 PathProgramCache]: Analyzing trace with hash -849330057, now seen corresponding path program 1 times [2019-09-05 13:08:14,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:08:14,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:08:14,829 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:08:14,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:08:14,829 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:08:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:08:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:08:15,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:08:15,452 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 13:08:15,453 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 54 with the following transitions: [2019-09-05 13:08:15,455 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [10], [14], [17], [20], [23], [27], [30], [33], [36], [40], [43], [46], [49], [53], [56], [59], [62], [66], [69], [72], [75], [79], [82], [85], [88], [92], [95], [98], [101], [105], [108], [111], [114], [118], [121], [123], [126], [129], [133], [136], [139], [142], [143], [175], [176], [180], [181], [182] [2019-09-05 13:08:15,520 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:08:15,521 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:08:15,593 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-05 13:08:15,595 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 47 root evaluator evaluations with a maximum evaluation depth of 0. Performed 47 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 76 variables. [2019-09-05 13:08:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:08:15,600 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-05 13:08:15,684 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-05 13:08:15,684 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-05 13:08:15,689 INFO L420 sIntCurrentIteration]: We unified 52 AI predicates to 52 [2019-09-05 13:08:15,690 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-05 13:08:15,690 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 13:08:15,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [20] total 20 [2019-09-05 13:08:15,691 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:08:15,695 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 13:08:15,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 13:08:15,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:08:15,696 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 2 states. [2019-09-05 13:08:15,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:08:15,697 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-05 13:08:15,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 13:08:15,697 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 53 [2019-09-05 13:08:15,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:08:15,699 INFO L225 Difference]: With dead ends: 2 [2019-09-05 13:08:15,699 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:08:15,700 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:08:15,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:08:15,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:08:15,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:08:15,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:08:15,703 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 53 [2019-09-05 13:08:15,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:08:15,704 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:08:15,704 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 13:08:15,705 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:08:15,705 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:08:15,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:08:15 BoogieIcfgContainer [2019-09-05 13:08:15,713 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:08:15,718 INFO L168 Benchmark]: Toolchain (without parser) took 5216.32 ms. Allocated memory was 138.9 MB in the beginning and 266.3 MB in the end (delta: 127.4 MB). Free memory was 84.7 MB in the beginning and 78.9 MB in the end (delta: 5.8 MB). Peak memory consumption was 133.2 MB. Max. memory is 7.1 GB. [2019-09-05 13:08:15,720 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 103.8 MB in the beginning and 103.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:08:15,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 656.56 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 84.3 MB in the beginning and 166.7 MB in the end (delta: -82.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2019-09-05 13:08:15,725 INFO L168 Benchmark]: Boogie Preprocessor took 113.25 ms. Allocated memory is still 199.8 MB. Free memory was 166.7 MB in the beginning and 161.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. [2019-09-05 13:08:15,726 INFO L168 Benchmark]: RCFGBuilder took 1193.64 ms. Allocated memory was 199.8 MB in the beginning and 222.3 MB in the end (delta: 22.5 MB). Free memory was 161.7 MB in the beginning and 179.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 93.0 MB. Max. memory is 7.1 GB. [2019-09-05 13:08:15,728 INFO L168 Benchmark]: TraceAbstraction took 3248.39 ms. Allocated memory was 222.3 MB in the beginning and 266.3 MB in the end (delta: 44.0 MB). Free memory was 179.4 MB in the beginning and 78.9 MB in the end (delta: 100.5 MB). Peak memory consumption was 144.5 MB. Max. memory is 7.1 GB. [2019-09-05 13:08:15,745 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 103.8 MB in the beginning and 103.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 656.56 ms. Allocated memory was 138.9 MB in the beginning and 199.8 MB in the end (delta: 60.8 MB). Free memory was 84.3 MB in the beginning and 166.7 MB in the end (delta: -82.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.25 ms. Allocated memory is still 199.8 MB. Free memory was 166.7 MB in the beginning and 161.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1193.64 ms. Allocated memory was 199.8 MB in the beginning and 222.3 MB in the end (delta: 22.5 MB). Free memory was 161.7 MB in the beginning and 179.4 MB in the end (delta: -17.7 MB). Peak memory consumption was 93.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3248.39 ms. Allocated memory was 222.3 MB in the beginning and 266.3 MB in the end (delta: 44.0 MB). Free memory was 179.4 MB in the beginning and 78.9 MB in the end (delta: 100.5 MB). Peak memory consumption was 144.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 465]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 93 SDslu, 737 SDs, 0 SdLazy, 743 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred 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, 6.211538461538462 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 34886 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...