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/reducercommutativity/sep10-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:26:30,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:26:30,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:26:30,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:26:30,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:26:30,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:26:30,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:26:30,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:26:30,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:26:30,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:26:30,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:26:30,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:26:30,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:26:30,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:26:30,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:26:30,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:26:30,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:26:30,650 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 13:26:30,664 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:26:30,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:26:30,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:26:30,665 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:26:30,666 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:26:30,666 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:26:30,667 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:26:30,667 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:26:30,667 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:26:30,667 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:26:30,668 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:26:30,668 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:26:30,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:26:30,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:26:30,669 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:26:30,669 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:26:30,669 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:26:30,670 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:26:30,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:26:30,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:26:30,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:26:30,670 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:26:30,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:26:30,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:26:30,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:26:30,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:26:30,671 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:26:30,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:26:30,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:26:30,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:26:30,700 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:26:30,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:26:30,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:26:30,721 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:26:30,723 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:26:30,724 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-09-20 13:26:30,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394d88dce/46c52694eb6a4a9c85e646d7a2c20560/FLAG0882a7819 [2019-09-20 13:26:31,268 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:26:31,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep10-2.i [2019-09-20 13:26:31,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394d88dce/46c52694eb6a4a9c85e646d7a2c20560/FLAG0882a7819 [2019-09-20 13:26:31,696 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/394d88dce/46c52694eb6a4a9c85e646d7a2c20560 [2019-09-20 13:26:31,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:26:31,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:26:31,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:31,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:26:31,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:26:31,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:31" (1/1) ... [2019-09-20 13:26:31,715 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@506faf70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:31, skipping insertion in model container [2019-09-20 13:26:31,716 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:26:31" (1/1) ... [2019-09-20 13:26:31,723 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:26:31,741 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:26:31,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:32,007 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:26:32,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:26:32,158 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:26:32,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32 WrapperNode [2019-09-20 13:26:32,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:26:32,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:26:32,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:26:32,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:26:32,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (1/1) ... [2019-09-20 13:26:32,238 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:26:32,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:26:32,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:26:32,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:26:32,240 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (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 13:26:32,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:26:32,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:26:32,320 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-09-20 13:26:32,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:26:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:26:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:26:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-09-20 13:26:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:26:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:26:32,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:26:32,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:26:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:26:32,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:26:32,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:26:32,721 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:26:32,721 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-20 13:26:32,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:32 BoogieIcfgContainer [2019-09-20 13:26:32,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:26:32,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:26:32,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:26:32,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:26:32,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:26:31" (1/3) ... [2019-09-20 13:26:32,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f522bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:32, skipping insertion in model container [2019-09-20 13:26:32,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:26:32" (2/3) ... [2019-09-20 13:26:32,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f522bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:26:32, skipping insertion in model container [2019-09-20 13:26:32,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:26:32" (3/3) ... [2019-09-20 13:26:32,745 INFO L109 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2019-09-20 13:26:32,758 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:26:32,767 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:26:32,785 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:26:32,812 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:26:32,812 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:26:32,812 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:26:32,813 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:26:32,813 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:26:32,813 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:26:32,813 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:26:32,814 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:26:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-09-20 13:26:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 13:26:32,837 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:32,838 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:32,840 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:32,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:32,847 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-09-20 13:26:32,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:32,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:32,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:32,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:32,901 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-20 13:26:33,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:33,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:26:33,013 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:33,018 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:33,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:33,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:33,034 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-09-20 13:26:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:33,054 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2019-09-20 13:26:33,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:33,055 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-20 13:26:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:33,064 INFO L225 Difference]: With dead ends: 32 [2019-09-20 13:26:33,065 INFO L226 Difference]: Without dead ends: 27 [2019-09-20 13:26:33,066 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-20 13:26:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-09-20 13:26:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 13:26:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-09-20 13:26:33,107 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-09-20 13:26:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:33,107 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-09-20 13:26:33,107 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:33,107 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-09-20 13:26:33,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-20 13:26:33,109 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:33,110 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:33,110 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:33,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:33,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-09-20 13:26:33,111 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:33,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:33,113 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:33,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:33,113 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-20 13:26:33,182 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:26:33,182 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:26:33,183 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:33,184 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:26:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:26:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:33,185 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-09-20 13:26:33,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:33,217 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-09-20 13:26:33,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:26:33,219 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-20 13:26:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:33,220 INFO L225 Difference]: With dead ends: 29 [2019-09-20 13:26:33,220 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 13:26:33,221 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:26:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 13:26:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-20 13:26:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 13:26:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-20 13:26:33,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-09-20 13:26:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:33,230 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-20 13:26:33,230 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:26:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-20 13:26:33,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 13:26:33,232 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:26:33,233 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:26:33,234 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:26:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:33,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-09-20 13:26:33,236 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:26:33,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:33,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:26:33,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:26:33,243 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:26:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:26:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-20 13:26:33,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:26:33,335 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:26:33,336 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2019-09-20 13:26:33,338 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [20], [22], [28], [36], [38], [41], [42], [49], [55], [68], [69], [70], [71], [72], [74], [75], [76], [77], [78], [79] [2019-09-20 13:26:33,372 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:26:33,373 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:26:33,426 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:26:33,428 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 28 variables. [2019-09-20 13:26:33,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:26:33,431 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:26:33,469 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-20 13:26:33,470 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:26:33,472 INFO L420 sIntCurrentIteration]: We unified 33 AI predicates to 33 [2019-09-20 13:26:33,473 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:26:33,473 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:26:33,473 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2019-09-20 13:26:33,474 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:26:33,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:26:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:26:33,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:33,475 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 2 states. [2019-09-20 13:26:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:26:33,476 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-20 13:26:33,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:26:33,476 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2019-09-20 13:26:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:26:33,477 INFO L225 Difference]: With dead ends: 6 [2019-09-20 13:26:33,477 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:26:33,477 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:26:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:26:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:26:33,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:26:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:26:33,478 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2019-09-20 13:26:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:26:33,479 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:26:33,479 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:26:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:26:33,479 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:26:33,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:26:33 BoogieIcfgContainer [2019-09-20 13:26:33,484 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:26:33,487 INFO L168 Benchmark]: Toolchain (without parser) took 1780.22 ms. Allocated memory was 133.7 MB in the beginning and 198.7 MB in the end (delta: 65.0 MB). Free memory was 89.1 MB in the beginning and 113.0 MB in the end (delta: -24.0 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:33,488 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 133.7 MB. Free memory was 106.8 MB in the beginning and 106.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:26:33,489 INFO L168 Benchmark]: CACSL2BoogieTranslator took 452.98 ms. Allocated memory was 133.7 MB in the beginning and 198.7 MB in the end (delta: 65.0 MB). Free memory was 88.6 MB in the beginning and 175.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:33,490 INFO L168 Benchmark]: Boogie Preprocessor took 77.86 ms. Allocated memory is still 198.7 MB. Free memory was 175.7 MB in the beginning and 173.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:33,491 INFO L168 Benchmark]: RCFGBuilder took 483.97 ms. Allocated memory is still 198.7 MB. Free memory was 173.4 MB in the beginning and 156.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:33,492 INFO L168 Benchmark]: TraceAbstraction took 760.74 ms. Allocated memory is still 198.7 MB. Free memory was 156.2 MB in the beginning and 113.0 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:26:33,496 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 133.7 MB. Free memory was 106.8 MB in the beginning and 106.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 452.98 ms. Allocated memory was 133.7 MB in the beginning and 198.7 MB in the end (delta: 65.0 MB). Free memory was 88.6 MB in the beginning and 175.7 MB in the end (delta: -87.1 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 77.86 ms. Allocated memory is still 198.7 MB. Free memory was 175.7 MB in the beginning and 173.4 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 483.97 ms. Allocated memory is still 198.7 MB. Free memory was 173.4 MB in the beginning and 156.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 760.74 ms. Allocated memory is still 198.7 MB. Free memory was 156.2 MB in the beginning and 113.0 MB in the end (delta: 43.2 MB). Peak memory consumption was 43.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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, 32 locations, 1 error locations. SAFE Result, 0.6s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 1 SDslu, 28 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 1 AbstIntIterations, 1 AbstIntStrong, 0.946969696969697 AbsIntWeakeningRatio, 1.303030303030303 AbsIntAvgWeakeningVarsNumRemoved, 0.18181818181818182 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3139 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 38/46 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...