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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:52:31,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:52:31,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:52:31,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 23:52:31,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:52:31,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:52:31,949 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:52:31,950 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:52:31,965 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:52:31,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:52:31,966 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:52:31,967 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:52:31,967 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:52:31,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:52:31,967 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:52:31,967 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:52:31,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:52:31,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:52:31,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:52:31,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:52:31,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:52:31,969 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:52:31,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:52:31,970 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:52:31,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:52:31,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:52:31,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:52:31,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:52:31,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:52:31,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:52:31,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:52:31,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:52:31,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:52:31,972 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:52:31,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:52:31,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:52:31,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:52:32,268 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:52:32,282 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:52:32,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:52:32,287 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:52:32,288 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:52:32,289 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2019-10-14 23:52:32,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dac68e382/b3284d98896c4a37a695e8bae3d8865e/FLAGee4abf6ed [2019-10-14 23:52:32,816 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:52:32,816 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2019-10-14 23:52:32,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dac68e382/b3284d98896c4a37a695e8bae3d8865e/FLAGee4abf6ed [2019-10-14 23:52:33,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dac68e382/b3284d98896c4a37a695e8bae3d8865e [2019-10-14 23:52:33,236 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:52:33,238 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:52:33,239 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:52:33,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:52:33,243 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:52:33,243 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,246 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bfc0887 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33, skipping insertion in model container [2019-10-14 23:52:33,246 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,254 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:52:33,271 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:52:33,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:52:33,468 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:52:33,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:52:33,512 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:52:33,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33 WrapperNode [2019-10-14 23:52:33,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:52:33,514 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:52:33,514 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:52:33,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:52:33,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (1/1) ... [2019-10-14 23:52:33,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:52:33,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:52:33,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:52:33,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:52:33,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (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 [2019-10-14 23:52:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:52:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:52:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:52:33,775 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-10-14 23:52:33,776 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:52:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 23:52:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:52:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:52:33,776 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-14 23:52:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 23:52:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-14 23:52:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:52:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:52:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-14 23:52:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:52:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:52:33,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:52:34,038 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:52:34,038 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:52:34,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:34 BoogieIcfgContainer [2019-10-14 23:52:34,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:52:34,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:52:34,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:52:34,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:52:34,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:52:33" (1/3) ... [2019-10-14 23:52:34,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460bc355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:34, skipping insertion in model container [2019-10-14 23:52:34,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:52:33" (2/3) ... [2019-10-14 23:52:34,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460bc355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:52:34, skipping insertion in model container [2019-10-14 23:52:34,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:52:34" (3/3) ... [2019-10-14 23:52:34,051 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2019-10-14 23:52:34,069 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:52:34,097 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:52:34,128 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:52:34,160 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:52:34,160 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:52:34,160 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:52:34,160 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:52:34,161 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:52:34,161 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:52:34,161 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:52:34,161 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:52:34,185 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:52:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:52:34,192 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:34,193 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:34,196 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:34,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2019-10-14 23:52:34,211 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:34,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074971346] [2019-10-14 23:52:34,212 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:34,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:52:34,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074971346] [2019-10-14 23:52:34,381 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:34,381 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:52:34,381 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423009988] [2019-10-14 23:52:34,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:52:34,388 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:34,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:52:34,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:34,401 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-10-14 23:52:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:34,427 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2019-10-14 23:52:34,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:52:34,429 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-10-14 23:52:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:34,438 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:52:34,438 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:52:34,442 INFO L600 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 [2019-10-14 23:52:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:52:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:52:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:52:34,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 23:52:34,485 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2019-10-14 23:52:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:34,486 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 23:52:34,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:52:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 23:52:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:52:34,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:34,487 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:52:34,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1453375688, now seen corresponding path program 1 times [2019-10-14 23:52:34,489 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:34,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571254261] [2019-10-14 23:52:34,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,490 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:52:34,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571254261] [2019-10-14 23:52:34,570 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:34,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:52:34,571 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753702915] [2019-10-14 23:52:34,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:52:34,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:34,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:52:34,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:34,574 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 23:52:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:34,615 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2019-10-14 23:52:34,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:52:34,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-14 23:52:34,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:34,619 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:52:34,619 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:52:34,621 INFO L600 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 [2019-10-14 23:52:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:52:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2019-10-14 23:52:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:52:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 23:52:34,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-10-14 23:52:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:34,634 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 23:52:34,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:52:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 23:52:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:52:34,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:34,636 INFO L380 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] [2019-10-14 23:52:34,636 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:34,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1976547036, now seen corresponding path program 1 times [2019-10-14 23:52:34,637 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:34,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945911267] [2019-10-14 23:52:34,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,638 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:34,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:52:34,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945911267] [2019-10-14 23:52:34,718 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:34,718 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:52:34,718 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128619302] [2019-10-14 23:52:34,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:52:34,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:34,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:52:34,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:52:34,720 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2019-10-14 23:52:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:34,738 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2019-10-14 23:52:34,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:52:34,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-14 23:52:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:34,741 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:52:34,741 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:52:34,742 INFO L600 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 [2019-10-14 23:52:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:52:34,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 23:52:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:52:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2019-10-14 23:52:34,748 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2019-10-14 23:52:34,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:34,749 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2019-10-14 23:52:34,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:52:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2019-10-14 23:52:34,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:52:34,750 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:34,750 INFO L380 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] [2019-10-14 23:52:34,751 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:34,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1583520026, now seen corresponding path program 1 times [2019-10-14 23:52:34,752 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:34,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284048552] [2019-10-14 23:52:34,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,752 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:34,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284048552] [2019-10-14 23:52:34,822 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:52:34,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:52:34,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554607178] [2019-10-14 23:52:34,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:52:34,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:52:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:52:34,825 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 4 states. [2019-10-14 23:52:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:34,868 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-10-14 23:52:34,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:52:34,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 23:52:34,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:34,870 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:52:34,870 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:52:34,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:52:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:52:34,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-14 23:52:34,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:52:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-10-14 23:52:34,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2019-10-14 23:52:34,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:34,877 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-10-14 23:52:34,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:52:34,877 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-10-14 23:52:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:52:34,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:52:34,878 INFO L380 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] [2019-10-14 23:52:34,879 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:52:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash -596099560, now seen corresponding path program 1 times [2019-10-14 23:52:34,879 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:52:34,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509072718] [2019-10-14 23:52:34,880 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,880 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:52:34,880 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:52:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:34,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509072718] [2019-10-14 23:52:34,957 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142110723] [2019-10-14 23:52:34,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:52:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:52:35,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:52:35,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:52:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:35,119 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:52:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:52:35,240 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1857722977] [2019-10-14 23:52:35,247 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 26 [2019-10-14 23:52:35,283 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:52:35,283 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-14 23:52:35,348 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-14 23:52:35,350 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 17 root evaluator evaluations with a maximum evaluation depth of 0. Performed 17 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 23 variables. [2019-10-14 23:52:35,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:52:35,353 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-14 23:52:35,392 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-14 23:52:35,392 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-14 23:52:35,394 INFO L553 sIntCurrentIteration]: We unified 24 AI predicates to 24 [2019-10-14 23:52:35,394 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-14 23:52:35,395 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-14 23:52:35,395 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5, 5] total 10 [2019-10-14 23:52:35,395 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405770346] [2019-10-14 23:52:35,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:52:35,397 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-14 23:52:35,397 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-14 23:52:35,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:52:35,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:35,398 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 2 states. [2019-10-14 23:52:35,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:52:35,400 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-10-14 23:52:35,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:52:35,400 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2019-10-14 23:52:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:52:35,401 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:52:35,401 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:52:35,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:52:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:52:35,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:52:35,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:52:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:52:35,402 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2019-10-14 23:52:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:52:35,403 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:52:35,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:52:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:52:35,403 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:52:35,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:52:35,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:52:35,656 INFO L446 ceAbstractionStarter]: At program point initENTRY(lines 9 16) the Hoare annotation is: true [2019-10-14 23:52:35,656 INFO L443 ceAbstractionStarter]: For program point initEXIT(lines 9 16) no Hoare annotation was computed. [2019-10-14 23:52:35,657 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2019-10-14 23:52:35,657 INFO L446 ceAbstractionStarter]: At program point L12-3(lines 12 15) the Hoare annotation is: true [2019-10-14 23:52:35,657 INFO L443 ceAbstractionStarter]: For program point L12-4(lines 9 16) no Hoare annotation was computed. [2019-10-14 23:52:35,657 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:52:35,657 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:52:35,657 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:52:35,657 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:52:35,658 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:52:35,658 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:52:35,658 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:52:35,658 INFO L443 ceAbstractionStarter]: For program point L33(lines 33 34) no Hoare annotation was computed. [2019-10-14 23:52:35,658 INFO L443 ceAbstractionStarter]: For program point L31-2(lines 31 35) no Hoare annotation was computed. [2019-10-14 23:52:35,658 INFO L439 ceAbstractionStarter]: At program point L31-3(lines 31 35) the Hoare annotation is: (= main_~flag~0 1) [2019-10-14 23:52:35,659 INFO L443 ceAbstractionStarter]: For program point L31-4(lines 31 35) no Hoare annotation was computed. [2019-10-14 23:52:35,659 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 17 37) no Hoare annotation was computed. [2019-10-14 23:52:35,659 INFO L439 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: false [2019-10-14 23:52:35,659 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-10-14 23:52:35,659 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 17 37) no Hoare annotation was computed. [2019-10-14 23:52:35,659 INFO L439 ceAbstractionStarter]: At program point L34(line 34) the Hoare annotation is: false [2019-10-14 23:52:35,659 INFO L443 ceAbstractionStarter]: For program point L34-1(line 34) no Hoare annotation was computed. [2019-10-14 23:52:35,660 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 17 37) the Hoare annotation is: true [2019-10-14 23:52:35,660 INFO L443 ceAbstractionStarter]: For program point L26(lines 26 29) no Hoare annotation was computed. [2019-10-14 23:52:35,660 INFO L443 ceAbstractionStarter]: For program point L24-2(lines 24 30) no Hoare annotation was computed. [2019-10-14 23:52:35,660 INFO L439 ceAbstractionStarter]: At program point L24-3(lines 24 30) the Hoare annotation is: (= main_~flag~0 1) [2019-10-14 23:52:35,660 INFO L443 ceAbstractionStarter]: For program point L24-4(lines 24 30) no Hoare annotation was computed. [2019-10-14 23:52:35,660 INFO L443 ceAbstractionStarter]: For program point L4-3(line 4) no Hoare annotation was computed. [2019-10-14 23:52:35,661 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 4) the Hoare annotation is: true [2019-10-14 23:52:35,661 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2019-10-14 23:52:35,661 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 4) no Hoare annotation was computed. [2019-10-14 23:52:35,661 INFO L443 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2019-10-14 23:52:35,661 INFO L443 ceAbstractionStarter]: For program point L4-1(line 4) no Hoare annotation was computed. [2019-10-14 23:52:35,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:52:35 BoogieIcfgContainer [2019-10-14 23:52:35,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:52:35,678 INFO L168 Benchmark]: Toolchain (without parser) took 2440.04 ms. Allocated memory was 144.2 MB in the beginning and 233.8 MB in the end (delta: 89.7 MB). Free memory was 101.7 MB in the beginning and 185.2 MB in the end (delta: -83.5 MB). Peak memory consumption was 6.2 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:35,679 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 144.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2019-10-14 23:52:35,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.47 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:35,681 INFO L168 Benchmark]: Boogie Preprocessor took 184.70 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 178.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:35,682 INFO L168 Benchmark]: RCFGBuilder took 340.59 ms. Allocated memory is still 201.3 MB. Free memory was 178.9 MB in the beginning and 162.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:35,683 INFO L168 Benchmark]: TraceAbstraction took 1635.52 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 162.3 MB in the beginning and 186.6 MB in the end (delta: -24.2 MB). Peak memory consumption was 8.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:52:35,687 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 144.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.47 ms. Allocated memory is still 144.2 MB. Free memory was 101.3 MB in the beginning and 91.3 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 184.70 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 178.9 MB in the end (delta: -87.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 340.59 ms. Allocated memory is still 201.3 MB. Free memory was 178.9 MB in the beginning and 162.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1635.52 ms. Allocated memory was 201.3 MB in the beginning and 233.8 MB in the end (delta: 32.5 MB). Free memory was 162.3 MB in the beginning and 186.6 MB in the end (delta: -24.2 MB). Peak memory consumption was 8.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: 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 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: flag == 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: flag == 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Result: SAFE, OverallTime: 1.5s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 14 SDslu, 104 SDs, 0 SdLazy, 27 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 15 PreInvPairs, 17 NumberOfFragments, 15 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 136 NumberOfCodeBlocks, 136 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 5576 SizeOfPredicates, 2 NumberOfNonLiveVariables, 109 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 5/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 107, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9583333333333334, AVG_VARS_REMOVED_DURING_WEAKENING: 1.0416666666666667, AVG_WEAKENED_CONJUNCTS: 0.25, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...