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-invgen/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-03 02:32:28,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-03 02:32:28,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-03 02:32:28,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-03 02:32:28,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-03 02:32:28,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-03 02:32:28,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-03 02:32:28,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-03 02:32:28,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-03 02:32:28,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-03 02:32:28,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-03 02:32:28,082 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-10-03 02:32:28,121 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 [2019-10-03 02:32:28,139 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-03 02:32:28,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-03 02:32:28,139 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-03 02:32:28,139 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-03 02:32:28,140 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-03 02:32:28,140 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-03 02:32:28,141 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-03 02:32:28,141 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-03 02:32:28,141 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-03 02:32:28,142 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-03 02:32:28,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-03 02:32:28,144 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-03 02:32:28,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-03 02:32:28,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-03 02:32:28,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-03 02:32:28,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-03 02:32:28,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-03 02:32:28,145 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-03 02:32:28,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-03 02:32:28,146 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-03 02:32:28,146 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-03 02:32:28,146 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-03 02:32:28,146 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-03 02:32:28,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-03 02:32:28,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-03 02:32:28,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-03 02:32:28,147 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-03 02:32:28,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-03 02:32:28,148 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-03 02:32:28,148 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-03 02:32:28,205 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-03 02:32:28,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-03 02:32:28,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-03 02:32:28,227 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-03 02:32:28,227 INFO L275 PluginConnector]: CDTParser initialized [2019-10-03 02:32:28,228 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2019-10-03 02:32:28,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0896cc5/53f87e5fa24049999f7325b4c5014b02/FLAGbe3c41b3f [2019-10-03 02:32:28,739 INFO L306 CDTParser]: Found 1 translation units. [2019-10-03 02:32:28,740 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2019-10-03 02:32:28,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0896cc5/53f87e5fa24049999f7325b4c5014b02/FLAGbe3c41b3f [2019-10-03 02:32:29,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b0896cc5/53f87e5fa24049999f7325b4c5014b02 [2019-10-03 02:32:29,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-03 02:32:29,191 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-03 02:32:29,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-03 02:32:29,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-03 02:32:29,196 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-03 02:32:29,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225cf470 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29, skipping insertion in model container [2019-10-03 02:32:29,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,208 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-03 02:32:29,226 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-03 02:32:29,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:32:29,407 INFO L188 MainTranslator]: Completed pre-run [2019-10-03 02:32:29,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-03 02:32:29,437 INFO L192 MainTranslator]: Completed translation [2019-10-03 02:32:29,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29 WrapperNode [2019-10-03 02:32:29,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-03 02:32:29,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-03 02:32:29,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-03 02:32:29,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-03 02:32:29,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,555 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,556 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (1/1) ... [2019-10-03 02:32:29,558 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-03 02:32:29,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-03 02:32:29,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-03 02:32:29,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-03 02:32:29,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (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 [2019-10-03 02:32:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-03 02:32:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-03 02:32:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-03 02:32:29,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-03 02:32:29,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-03 02:32:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-03 02:32:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-03 02:32:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-03 02:32:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-03 02:32:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-03 02:32:29,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-03 02:32:29,834 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-03 02:32:29,835 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-03 02:32:29,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:32:29 BoogieIcfgContainer [2019-10-03 02:32:29,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-03 02:32:29,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-03 02:32:29,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-03 02:32:29,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-03 02:32:29,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.10 02:32:29" (1/3) ... [2019-10-03 02:32:29,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358759e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:32:29, skipping insertion in model container [2019-10-03 02:32:29,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.10 02:32:29" (2/3) ... [2019-10-03 02:32:29,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@358759e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.10 02:32:29, skipping insertion in model container [2019-10-03 02:32:29,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.10 02:32:29" (3/3) ... [2019-10-03 02:32:29,845 INFO L109 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2019-10-03 02:32:29,855 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-03 02:32:29,863 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-03 02:32:29,899 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-03 02:32:29,943 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-03 02:32:29,943 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-03 02:32:29,944 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-03 02:32:29,944 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-03 02:32:29,944 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-03 02:32:29,944 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-03 02:32:29,944 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-03 02:32:29,945 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-03 02:32:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-03 02:32:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-03 02:32:29,973 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:29,975 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:29,979 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:29,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:29,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1770779542, now seen corresponding path program 1 times [2019-10-03 02:32:29,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:30,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:30,044 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:30,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:30,045 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:30,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:32:30,219 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:30,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-03 02:32:30,219 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:30,223 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:32:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:32:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:30,237 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 6 states. [2019-10-03 02:32:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:30,370 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-10-03 02:32:30,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-03 02:32:30,372 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-03 02:32:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:30,382 INFO L225 Difference]: With dead ends: 36 [2019-10-03 02:32:30,383 INFO L226 Difference]: Without dead ends: 28 [2019-10-03 02:32:30,385 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:32:30,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-03 02:32:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-03 02:32:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-03 02:32:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-03 02:32:30,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2019-10-03 02:32:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:30,426 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-03 02:32:30,426 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:32:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-03 02:32:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-03 02:32:30,427 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:30,428 INFO L411 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:30,428 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:30,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1769173835, now seen corresponding path program 1 times [2019-10-03 02:32:30,429 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:30,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:30,431 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:30,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:30,431 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-03 02:32:30,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-03 02:32:30,519 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-03 02:32:30,521 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-03 02:32:30,523 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-03 02:32:30,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-03 02:32:30,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-03 02:32:30,524 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 6 states. [2019-10-03 02:32:30,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:30,642 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-03 02:32:30,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-03 02:32:30,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2019-10-03 02:32:30,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:30,645 INFO L225 Difference]: With dead ends: 36 [2019-10-03 02:32:30,646 INFO L226 Difference]: Without dead ends: 36 [2019-10-03 02:32:30,647 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-03 02:32:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-03 02:32:30,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-03 02:32:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-03 02:32:30,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-10-03 02:32:30,660 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 23 [2019-10-03 02:32:30,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:30,660 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-10-03 02:32:30,660 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-03 02:32:30,660 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-10-03 02:32:30,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-03 02:32:30,663 INFO L403 BasicCegarLoop]: Found error trace [2019-10-03 02:32:30,663 INFO L411 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-03 02:32:30,663 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-03 02:32:30,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:30,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1089945877, now seen corresponding path program 1 times [2019-10-03 02:32:30,664 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-03 02:32:30,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:30,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:30,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-03 02:32:30,666 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-03 02:32:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:30,797 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-03 02:32:30,797 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:32:30,798 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-03 02:32:30,798 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2019-10-03 02:32:30,800 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [12], [16], [19], [25], [31], [39], [44], [52], [55], [57], [62], [65], [67], [70], [72], [73], [74], [75], [77], [78], [79], [80] [2019-10-03 02:32:30,840 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-03 02:32:30,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-03 02:32:31,093 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-03 02:32:31,096 INFO L272 AbstractInterpreter]: Visited 25 different actions 132 times. Merged at 5 different actions 30 times. Widened at 1 different actions 2 times. Performed 169 root evaluator evaluations with a maximum evaluation depth of 6. Performed 169 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 10 variables. [2019-10-03 02:32:31,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-03 02:32:31,101 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-03 02:32:31,102 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-03 02:32:31,102 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-10-03 02:32:31,121 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-03 02:32:31,121 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-10-03 02:32:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-03 02:32:31,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-03 02:32:31,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-03 02:32:31,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-03 02:32:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-03 02:32:31,317 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-03 02:32:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-03 02:32:31,475 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-03 02:32:31,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2019-10-03 02:32:31,476 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-10-03 02:32:31,476 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-03 02:32:31,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-03 02:32:31,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-10-03 02:32:31,478 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2019-10-03 02:32:31,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-03 02:32:31,696 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-10-03 02:32:31,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-03 02:32:31,697 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-10-03 02:32:31,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-03 02:32:31,697 INFO L225 Difference]: With dead ends: 39 [2019-10-03 02:32:31,698 INFO L226 Difference]: Without dead ends: 0 [2019-10-03 02:32:31,698 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-10-03 02:32:31,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-03 02:32:31,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-03 02:32:31,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-03 02:32:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-03 02:32:31,699 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2019-10-03 02:32:31,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-03 02:32:31,699 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-03 02:32:31,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-03 02:32:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-03 02:32:31,700 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-03 02:32:31,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.10 02:32:31 BoogieIcfgContainer [2019-10-03 02:32:31,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-03 02:32:31,709 INFO L168 Benchmark]: Toolchain (without parser) took 2516.27 ms. Allocated memory was 140.5 MB in the beginning and 225.4 MB in the end (delta: 84.9 MB). Free memory was 87.2 MB in the beginning and 141.2 MB in the end (delta: -53.9 MB). Peak memory consumption was 31.0 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:31,711 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-10-03 02:32:31,712 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.06 ms. Allocated memory is still 140.5 MB. Free memory was 86.8 MB in the beginning and 77.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:31,714 INFO L168 Benchmark]: Boogie Preprocessor took 119.41 ms. Allocated memory was 140.5 MB in the beginning and 198.7 MB in the end (delta: 58.2 MB). Free memory was 77.3 MB in the beginning and 176.3 MB in the end (delta: -98.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:31,716 INFO L168 Benchmark]: RCFGBuilder took 278.68 ms. Allocated memory is still 198.7 MB. Free memory was 175.7 MB in the beginning and 161.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:31,717 INFO L168 Benchmark]: TraceAbstraction took 1867.55 ms. Allocated memory was 198.7 MB in the beginning and 225.4 MB in the end (delta: 26.7 MB). Free memory was 161.9 MB in the beginning and 141.2 MB in the end (delta: 20.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. [2019-10-03 02:32:31,728 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.5 MB. Free memory was 105.4 MB in the beginning and 105.2 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.06 ms. Allocated memory is still 140.5 MB. Free memory was 86.8 MB in the beginning and 77.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.41 ms. Allocated memory was 140.5 MB in the beginning and 198.7 MB in the end (delta: 58.2 MB). Free memory was 77.3 MB in the beginning and 176.3 MB in the end (delta: -98.9 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 278.68 ms. Allocated memory is still 198.7 MB. Free memory was 175.7 MB in the beginning and 161.9 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1867.55 ms. Allocated memory was 198.7 MB in the beginning and 225.4 MB in the end (delta: 26.7 MB). Free memory was 161.9 MB in the beginning and 141.2 MB in the end (delta: 20.7 MB). Peak memory consumption was 47.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. SAFE Result, 1.7s OverallTime, 3 OverallIterations, 4 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 39 SDslu, 336 SDs, 0 SdLazy, 168 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN 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, 0.6s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 144 ConstructedInterpolants, 0 QuantifiedInterpolants, 13813 SizeOfPredicates, 9 NumberOfNonLiveVariables, 82 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 57/65 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...