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/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:06:03,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:06:03,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:06:03,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:06:03,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:06:03,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:06:03,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:06:03,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:06:03,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:06:03,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:06:03,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:06:03,277 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:06:03,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:06:03,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:06:03,284 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:06:03,285 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:06:03,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:06:03,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:06:03,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:06:03,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:06:03,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:06:03,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:06:03,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:06:03,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:06:03,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 21:06:03,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 21:06:03,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 21:06:03,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 21:06:03,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 21:06:03,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 21:06:03,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 21:06:03,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 21:06:03,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 21:06:03,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 21:06:03,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 21:06:03,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 21:06:03,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 21:06:03,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 21:06:03,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:06:03,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:06:03,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:06:03,316 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 [2019-10-13 21:06:03,337 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:06:03,337 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:06:03,339 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:06:03,339 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:06:03,340 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:06:03,340 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:06:03,340 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:06:03,340 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:06:03,340 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:06:03,341 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:06:03,342 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:06:03,342 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:06:03,342 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:06:03,343 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:06:03,343 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:06:03,343 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:06:03,343 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:06:03,343 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:06:03,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:06:03,344 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:06:03,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:06:03,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:06:03,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:06:03,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:06:03,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:06:03,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:06:03,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:06:03,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:06:03,346 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 [2019-10-13 21:06:03,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:06:03,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:06:03,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:06:03,659 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:06:03,660 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:06:03,660 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2019-10-13 21:06:03,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981a69220/8331e585790646999c1360d38922ab81/FLAG3c0a450cf [2019-10-13 21:06:04,213 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:06:04,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2019-10-13 21:06:04,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981a69220/8331e585790646999c1360d38922ab81/FLAG3c0a450cf [2019-10-13 21:06:04,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/981a69220/8331e585790646999c1360d38922ab81 [2019-10-13 21:06:04,582 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:06:04,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:06:04,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:04,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:06:04,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:06:04,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37bb7e8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04, skipping insertion in model container [2019-10-13 21:06:04,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,599 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:06:04,624 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:06:04,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:04,811 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:06:04,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:06:04,846 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:06:04,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04 WrapperNode [2019-10-13 21:06:04,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:06:04,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:06:04,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:06:04,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:06:04,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,951 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (1/1) ... [2019-10-13 21:06:04,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:06:04,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:06:04,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:06:04,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:06:04,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (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 [2019-10-13 21:06:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:06:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:06:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:06:05,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:06:05,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:06:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:06:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:06:05,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:06:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:06:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:06:05,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:06:05,323 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:06:05,324 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 21:06:05,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:05 BoogieIcfgContainer [2019-10-13 21:06:05,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:06:05,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:06:05,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:06:05,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:06:05,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:06:04" (1/3) ... [2019-10-13 21:06:05,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac70c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:05, skipping insertion in model container [2019-10-13 21:06:05,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:06:04" (2/3) ... [2019-10-13 21:06:05,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ac70c4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:06:05, skipping insertion in model container [2019-10-13 21:06:05,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:06:05" (3/3) ... [2019-10-13 21:06:05,347 INFO L109 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2019-10-13 21:06:05,357 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:06:05,375 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:06:05,388 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:06:05,414 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:06:05,414 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:06:05,414 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:06:05,414 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:06:05,415 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:06:05,415 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:06:05,415 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:06:05,415 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:06:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2019-10-13 21:06:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 21:06:05,438 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:05,439 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:05,440 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:05,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:05,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2074932940, now seen corresponding path program 1 times [2019-10-13 21:06:05,455 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:05,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846420608] [2019-10-13 21:06:05,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:05,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:05,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:05,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846420608] [2019-10-13 21:06:05,559 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:05,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 21:06:05,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680401309] [2019-10-13 21:06:05,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 21:06:05,566 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:05,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 21:06:05,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 21:06:05,580 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2019-10-13 21:06:05,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:05,625 INFO L93 Difference]: Finished difference Result 87 states and 156 transitions. [2019-10-13 21:06:05,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 21:06:05,626 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-13 21:06:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:05,639 INFO L225 Difference]: With dead ends: 87 [2019-10-13 21:06:05,639 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 21:06:05,647 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 [2019-10-13 21:06:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 21:06:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-13 21:06:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 21:06:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2019-10-13 21:06:05,720 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 60 transitions. Word has length 12 [2019-10-13 21:06:05,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:05,721 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 60 transitions. [2019-10-13 21:06:05,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 21:06:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 60 transitions. [2019-10-13 21:06:05,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 21:06:05,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:05,725 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:05,726 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:05,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:05,728 INFO L82 PathProgramCache]: Analyzing trace with hash -132543993, now seen corresponding path program 1 times [2019-10-13 21:06:05,728 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:05,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139330164] [2019-10-13 21:06:05,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:05,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:05,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:05,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139330164] [2019-10-13 21:06:05,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:05,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:06:05,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518632465] [2019-10-13 21:06:05,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:06:05,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:06:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:06:05,886 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 5 states. [2019-10-13 21:06:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:06,111 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2019-10-13 21:06:06,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:06:06,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-13 21:06:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:06,115 INFO L225 Difference]: With dead ends: 48 [2019-10-13 21:06:06,115 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 21:06:06,117 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:06:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 21:06:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-13 21:06:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 21:06:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2019-10-13 21:06:06,131 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 13 [2019-10-13 21:06:06,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:06,132 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2019-10-13 21:06:06,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:06:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2019-10-13 21:06:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 21:06:06,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:06,134 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:06,134 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash -811261734, now seen corresponding path program 1 times [2019-10-13 21:06:06,135 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:06,135 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683239285] [2019-10-13 21:06:06,135 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:06,136 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:06,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:06,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683239285] [2019-10-13 21:06:06,181 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:06,181 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:06:06,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233424559] [2019-10-13 21:06:06,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:06:06,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:06,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:06:06,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:06:06,183 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand 5 states. [2019-10-13 21:06:06,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:06,254 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2019-10-13 21:06:06,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:06:06,255 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-13 21:06:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:06,256 INFO L225 Difference]: With dead ends: 52 [2019-10-13 21:06:06,256 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 21:06:06,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:06:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 21:06:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-13 21:06:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 21:06:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-13 21:06:06,265 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2019-10-13 21:06:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:06,266 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-13 21:06:06,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:06:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-13 21:06:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 21:06:06,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:06,267 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:06,268 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1679618026, now seen corresponding path program 1 times [2019-10-13 21:06:06,268 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:06,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766232431] [2019-10-13 21:06:06,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:06,269 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:06,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:06,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:06:06,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766232431] [2019-10-13 21:06:06,323 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:06:06,323 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:06:06,324 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848457014] [2019-10-13 21:06:06,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:06:06,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:06:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:06:06,325 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2019-10-13 21:06:06,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:06,430 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2019-10-13 21:06:06,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:06:06,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-13 21:06:06,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:06,432 INFO L225 Difference]: With dead ends: 55 [2019-10-13 21:06:06,433 INFO L226 Difference]: Without dead ends: 53 [2019-10-13 21:06:06,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:06:06,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-13 21:06:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-10-13 21:06:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 21:06:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2019-10-13 21:06:06,449 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 19 [2019-10-13 21:06:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:06,449 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2019-10-13 21:06:06,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:06:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2019-10-13 21:06:06,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 21:06:06,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:06:06,453 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:06:06,454 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:06:06,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2122625936, now seen corresponding path program 1 times [2019-10-13 21:06:06,455 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 21:06:06,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717108998] [2019-10-13 21:06:06,455 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:06,456 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:06:06,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:06:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:06:06,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717108998] [2019-10-13 21:06:06,634 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861520941] [2019-10-13 21:06:06,634 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 [2019-10-13 21:06:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:06:06,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 21:06:06,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:06:06,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:06:06,863 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:06:06,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:06,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:06,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:06,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:07,000 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 21:06:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:06:07,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1928284801] [2019-10-13 21:06:07,014 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 34 [2019-10-13 21:06:07,051 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 21:06:07,052 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 21:06:07,266 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-13 21:06:07,269 INFO L272 AbstractInterpreter]: Visited 20 different actions 133 times. Merged at 6 different actions 36 times. Widened at 1 different actions 2 times. Performed 184 root evaluator evaluations with a maximum evaluation depth of 5. Performed 184 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 6 variables. [2019-10-13 21:06:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:06:07,275 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:06:07,276 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:06:07,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 17 [2019-10-13 21:06:07,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831426840] [2019-10-13 21:06:07,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 21:06:07,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 21:06:07,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 21:06:07,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-10-13 21:06:07,278 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand 17 states. [2019-10-13 21:06:07,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:06:07,533 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2019-10-13 21:06:07,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:06:07,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2019-10-13 21:06:07,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:06:07,534 INFO L225 Difference]: With dead ends: 51 [2019-10-13 21:06:07,535 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 21:06:07,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-10-13 21:06:07,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 21:06:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 21:06:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 21:06:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 21:06:07,539 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2019-10-13 21:06:07,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:06:07,540 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 21:06:07,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 21:06:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 21:06:07,540 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 21:06:07,746 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:06:07,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 21:06:07,958 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-10-13 21:06:07,959 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:07,959 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 21:06:07,959 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 21:06:07,959 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 21:06:07,959 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 21:06:07,960 INFO L439 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,960 INFO L446 ceAbstractionStarter]: At program point L60(lines 11 63) the Hoare annotation is: true [2019-10-13 21:06:07,960 INFO L439 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,960 INFO L439 ceAbstractionStarter]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,961 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 63) no Hoare annotation was computed. [2019-10-13 21:06:07,961 INFO L443 ceAbstractionStarter]: For program point L56(line 56) no Hoare annotation was computed. [2019-10-13 21:06:07,961 INFO L443 ceAbstractionStarter]: For program point L52(lines 52 54) no Hoare annotation was computed. [2019-10-13 21:06:07,961 INFO L443 ceAbstractionStarter]: For program point L19(lines 19 23) no Hoare annotation was computed. [2019-10-13 21:06:07,961 INFO L443 ceAbstractionStarter]: For program point L15(line 15) no Hoare annotation was computed. [2019-10-13 21:06:07,961 INFO L443 ceAbstractionStarter]: For program point L15-1(line 15) no Hoare annotation was computed. [2019-10-13 21:06:07,962 INFO L443 ceAbstractionStarter]: For program point L40(lines 40 54) no Hoare annotation was computed. [2019-10-13 21:06:07,962 INFO L439 ceAbstractionStarter]: At program point L40-1(lines 40 54) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,962 INFO L439 ceAbstractionStarter]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,962 INFO L439 ceAbstractionStarter]: At program point L36-1(line 36) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,963 INFO L443 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2019-10-13 21:06:07,963 INFO L443 ceAbstractionStarter]: For program point L28(line 28) no Hoare annotation was computed. [2019-10-13 21:06:07,963 INFO L443 ceAbstractionStarter]: For program point L24(lines 24 26) no Hoare annotation was computed. [2019-10-13 21:06:07,963 INFO L439 ceAbstractionStarter]: At program point L20(line 20) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,963 INFO L439 ceAbstractionStarter]: At program point L20-1(line 20) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,963 INFO L443 ceAbstractionStarter]: For program point L45(lines 45 49) no Hoare annotation was computed. [2019-10-13 21:06:07,964 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2019-10-13 21:06:07,964 INFO L439 ceAbstractionStarter]: At program point L46(line 46) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,964 INFO L439 ceAbstractionStarter]: At program point L46-1(line 46) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,964 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 63) no Hoare annotation was computed. [2019-10-13 21:06:07,964 INFO L439 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,965 INFO L439 ceAbstractionStarter]: At program point L42-1(line 42) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,965 INFO L439 ceAbstractionStarter]: At program point L34-2(lines 34 58) the Hoare annotation is: (and (<= 1 main_~tagbuf_len~0) (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,965 INFO L439 ceAbstractionStarter]: At program point L34-3(lines 34 58) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,965 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 63) the Hoare annotation is: true [2019-10-13 21:06:07,965 INFO L439 ceAbstractionStarter]: At program point L59(line 59) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,966 INFO L439 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,966 INFO L439 ceAbstractionStarter]: At program point L18-2(lines 18 30) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0)) [2019-10-13 21:06:07,966 INFO L439 ceAbstractionStarter]: At program point L18-3(lines 18 30) the Hoare annotation is: (and (<= main_~t~0 main_~tagbuf_len~0) (<= 0 main_~t~0) (not (= main_~tagbuf_len~0 main_~t~0))) [2019-10-13 21:06:07,966 INFO L443 ceAbstractionStarter]: For program point L43(line 43) no Hoare annotation was computed. [2019-10-13 21:06:07,966 INFO L443 ceAbstractionStarter]: For program point L35(lines 35 39) no Hoare annotation was computed. [2019-10-13 21:06:07,967 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-10-13 21:06:07,967 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-10-13 21:06:07,967 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-13 21:06:07,967 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-13 21:06:07,967 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-13 21:06:07,967 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-10-13 21:06:07,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 09:06:07 BoogieIcfgContainer [2019-10-13 21:06:07,986 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 21:06:07,991 INFO L168 Benchmark]: Toolchain (without parser) took 3404.81 ms. Allocated memory was 138.9 MB in the beginning and 235.4 MB in the end (delta: 96.5 MB). Free memory was 103.1 MB in the beginning and 87.5 MB in the end (delta: 15.6 MB). Peak memory consumption was 112.1 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:07,995 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:06:07,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.08 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:08,003 INFO L168 Benchmark]: Boogie Preprocessor took 128.13 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.9 MB in the beginning and 181.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:08,004 INFO L168 Benchmark]: RCFGBuilder took 354.69 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 165.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:08,005 INFO L168 Benchmark]: TraceAbstraction took 2654.82 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 165.5 MB in the beginning and 87.5 MB in the end (delta: 78.0 MB). Peak memory consumption was 110.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:06:08,012 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.08 ms. Allocated memory is still 138.9 MB. Free memory was 102.9 MB in the beginning and 92.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.13 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.9 MB in the beginning and 181.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 354.69 ms. Allocated memory is still 202.9 MB. Free memory was 181.3 MB in the beginning and 165.5 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2654.82 ms. Allocated memory was 202.9 MB in the beginning and 235.4 MB in the end (delta: 32.5 MB). Free memory was 165.5 MB in the beginning and 87.5 MB in the end (delta: 78.0 MB). Peak memory consumption was 110.5 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 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: t <= tagbuf_len && 0 <= t - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (1 <= tagbuf_len && t <= tagbuf_len) && 0 <= t - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 2.5s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, HoareTripleCheckerStatistics: 245 SDtfs, 74 SDslu, 553 SDs, 0 SdLazy, 294 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=4, 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, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 24 LocationsWithAnnotation, 59 PreInvPairs, 79 NumberOfFragments, 175 HoareAnnotationTreeSize, 59 FomulaSimplifications, 11 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 24 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 11020 SizeOfPredicates, 4 NumberOfNonLiveVariables, 69 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 46/73 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...