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-examples/standard_compareModified_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:53:05,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:53:05,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:53:05,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:53:05,485 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:53:05,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:53:05,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:53:05,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:53:05,491 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:53:05,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:53:05,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:53:05,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:53:05,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:53:05,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:53:05,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:53:05,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:53:05,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:53:05,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:53:05,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:53:05,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:53:05,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:53:05,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:53:05,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:53:05,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:53:05,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:53:05,509 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:53:05,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:53:05,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:53:05,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:53:05,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:53:05,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:53:05,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:53:05,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:53:05,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:53:05,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:53:05,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:53:05,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:53:05,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:53:05,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:53:05,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:53:05,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:53:05,524 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 19:53:05,546 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:53:05,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:53:05,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:53:05,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:53:05,549 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:53:05,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:53:05,549 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:53:05,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:53:05,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:53:05,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:53:05,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:53:05,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:53:05,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:53:05,552 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:53:05,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:53:05,552 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:53:05,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:53:05,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:53:05,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:53:05,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:53:05,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:53:05,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:53:05,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:53:05,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:53:05,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:53:05,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:53:05,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:53:05,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:53:05,555 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 19:53:05,877 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:53:05,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:53:05,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:53:05,904 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:53:05,905 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:53:05,905 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-10-13 19:53:05,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/694a43002/40ef45d5ea5e4a4091280a910ed08a64/FLAG9710bf6f0 [2019-10-13 19:53:06,410 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:53:06,411 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_compareModified_ground.i [2019-10-13 19:53:06,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/694a43002/40ef45d5ea5e4a4091280a910ed08a64/FLAG9710bf6f0 [2019-10-13 19:53:06,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/694a43002/40ef45d5ea5e4a4091280a910ed08a64 [2019-10-13 19:53:06,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:53:06,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:53:06,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:53:06,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:53:06,817 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:53:06,818 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:53:06" (1/1) ... [2019-10-13 19:53:06,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70cf440b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:06, skipping insertion in model container [2019-10-13 19:53:06,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:53:06" (1/1) ... [2019-10-13 19:53:06,828 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:53:06,850 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:53:07,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:53:07,082 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:53:07,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:53:07,249 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:53:07,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07 WrapperNode [2019-10-13 19:53:07,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:53:07,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:53:07,251 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:53:07,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:53:07,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,276 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,300 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (1/1) ... [2019-10-13 19:53:07,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:53:07,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:53:07,320 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:53:07,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:53:07,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (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 19:53:07,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:53:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:53:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:53:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:53:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:53:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:53:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:53:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:53:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:53:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:53:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:53:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:53:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:53:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:53:07,649 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:53:07,650 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-13 19:53:07,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:53:07 BoogieIcfgContainer [2019-10-13 19:53:07,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:53:07,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:53:07,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:53:07,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:53:07,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:53:06" (1/3) ... [2019-10-13 19:53:07,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6163754b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:53:07, skipping insertion in model container [2019-10-13 19:53:07,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:53:07" (2/3) ... [2019-10-13 19:53:07,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6163754b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:53:07, skipping insertion in model container [2019-10-13 19:53:07,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:53:07" (3/3) ... [2019-10-13 19:53:07,661 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2019-10-13 19:53:07,673 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:53:07,681 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:53:07,695 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:53:07,744 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:53:07,744 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:53:07,747 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:53:07,747 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:53:07,748 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:53:07,748 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:53:07,748 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:53:07,748 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:53:07,777 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-13 19:53:07,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:53:07,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:07,786 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:07,788 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:07,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1992705634, now seen corresponding path program 1 times [2019-10-13 19:53:07,803 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:07,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758839487] [2019-10-13 19:53:07,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:07,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:07,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:07,925 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 19:53:07,926 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758839487] [2019-10-13 19:53:07,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:07,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 19:53:07,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483244131] [2019-10-13 19:53:07,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:53:07,933 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:07,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:53:07,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:07,950 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-10-13 19:53:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:07,972 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2019-10-13 19:53:07,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:53:07,973 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-10-13 19:53:07,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:07,981 INFO L225 Difference]: With dead ends: 58 [2019-10-13 19:53:07,981 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 19:53:07,984 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 19:53:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 19:53:08,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-13 19:53:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:53:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-13 19:53:08,021 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 15 [2019-10-13 19:53:08,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,021 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-13 19:53:08,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:53:08,022 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-13 19:53:08,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:53:08,023 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:08,023 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:08,023 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,024 INFO L82 PathProgramCache]: Analyzing trace with hash -2038513977, now seen corresponding path program 1 times [2019-10-13 19:53:08,024 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:08,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270045208] [2019-10-13 19:53:08,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,025 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,084 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 19:53:08,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270045208] [2019-10-13 19:53:08,085 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:08,086 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:53:08,086 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718770507] [2019-10-13 19:53:08,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:53:08,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:08,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:53:08,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:53:08,089 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-10-13 19:53:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:08,114 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-10-13 19:53:08,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:53:08,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-13 19:53:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:08,116 INFO L225 Difference]: With dead ends: 50 [2019-10-13 19:53:08,117 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:53:08,118 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 [2019-10-13 19:53:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:53:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 19:53:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:53:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-10-13 19:53:08,125 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 15 [2019-10-13 19:53:08,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,126 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-10-13 19:53:08,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:53:08,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2019-10-13 19:53:08,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 19:53:08,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:08,128 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:53:08,128 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:08,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1204074085, now seen corresponding path program 1 times [2019-10-13 19:53:08,129 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:08,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506628808] [2019-10-13 19:53:08,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,129 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:53:08,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506628808] [2019-10-13 19:53:08,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:08,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:53:08,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104913873] [2019-10-13 19:53:08,192 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:53:08,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:08,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:53:08,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:53:08,193 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 3 states. [2019-10-13 19:53:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:08,212 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-10-13 19:53:08,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:53:08,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-13 19:53:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:08,214 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:53:08,214 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 19:53:08,215 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 [2019-10-13 19:53:08,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 19:53:08,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-10-13 19:53:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:53:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-10-13 19:53:08,222 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2019-10-13 19:53:08,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,226 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-10-13 19:53:08,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:53:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-10-13 19:53:08,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:53:08,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:08,228 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] [2019-10-13 19:53:08,228 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:08,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,229 INFO L82 PathProgramCache]: Analyzing trace with hash -489632055, now seen corresponding path program 1 times [2019-10-13 19:53:08,230 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:08,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139505783] [2019-10-13 19:53:08,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,232 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:53:08,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139505783] [2019-10-13 19:53:08,311 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:53:08,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:53:08,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283824694] [2019-10-13 19:53:08,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:53:08,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:08,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:53:08,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:53:08,314 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2019-10-13 19:53:08,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:08,351 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 19:53:08,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:53:08,352 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-13 19:53:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:08,355 INFO L225 Difference]: With dead ends: 55 [2019-10-13 19:53:08,355 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:53:08,356 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 [2019-10-13 19:53:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:53:08,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2019-10-13 19:53:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:53:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-10-13 19:53:08,367 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-10-13 19:53:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,367 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-10-13 19:53:08,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:53:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-10-13 19:53:08,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:53:08,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:53:08,369 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] [2019-10-13 19:53:08,369 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:53:08,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,370 INFO L82 PathProgramCache]: Analyzing trace with hash -882659065, now seen corresponding path program 1 times [2019-10-13 19:53:08,370 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:53:08,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942577674] [2019-10-13 19:53:08,370 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:53:08,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:53:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:53:08,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942577674] [2019-10-13 19:53:08,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530313970] [2019-10-13 19:53:08,445 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 19:53:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:53:08,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:53:08,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:53:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:53:08,535 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:53:08,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:53:08,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [384440445] [2019-10-13 19:53:08,588 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 21 [2019-10-13 19:53:08,619 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 19:53:08,619 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 19:53:08,672 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 19:53:08,674 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 30 variables. [2019-10-13 19:53:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:53:08,678 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 19:53:08,716 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-13 19:53:08,716 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 19:53:08,718 INFO L553 sIntCurrentIteration]: We unified 19 AI predicates to 19 [2019-10-13 19:53:08,718 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 19:53:08,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 19:53:08,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-10-13 19:53:08,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043811057] [2019-10-13 19:53:08,720 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:53:08,721 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 19:53:08,721 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 19:53:08,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:53:08,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:53:08,722 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 2 states. [2019-10-13 19:53:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:53:08,724 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-10-13 19:53:08,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:53:08,725 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-10-13 19:53:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:53:08,725 INFO L225 Difference]: With dead ends: 35 [2019-10-13 19:53:08,726 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 19:53:08,726 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 19:53:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 19:53:08,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 19:53:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 19:53:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 19:53:08,727 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-10-13 19:53:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:53:08,728 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 19:53:08,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:53:08,728 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 19:53:08,728 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 19:53:08,932 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:53:08,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 19:53:08,991 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:53:08,991 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:53:08,992 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:53:08,992 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:53:08,992 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-13 19:53:08,992 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:53:08,992 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:53:08,993 INFO L439 ceAbstractionStarter]: At program point L31(line 31) the Hoare annotation is: false [2019-10-13 19:53:08,993 INFO L443 ceAbstractionStarter]: For program point L31-1(line 31) no Hoare annotation was computed. [2019-10-13 19:53:08,993 INFO L439 ceAbstractionStarter]: At program point L27(line 27) the Hoare annotation is: false [2019-10-13 19:53:08,993 INFO L443 ceAbstractionStarter]: For program point L27-1(line 27) no Hoare annotation was computed. [2019-10-13 19:53:08,993 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 5 34) no Hoare annotation was computed. [2019-10-13 19:53:08,994 INFO L443 ceAbstractionStarter]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2019-10-13 19:53:08,994 INFO L439 ceAbstractionStarter]: At program point L12-3(lines 12 15) the Hoare annotation is: false [2019-10-13 19:53:08,994 INFO L443 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2019-10-13 19:53:08,994 INFO L443 ceAbstractionStarter]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2019-10-13 19:53:08,994 INFO L443 ceAbstractionStarter]: For program point L17-1(lines 5 34) no Hoare annotation was computed. [2019-10-13 19:53:08,994 INFO L443 ceAbstractionStarter]: For program point L17-2(lines 17 23) no Hoare annotation was computed. [2019-10-13 19:53:08,995 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 5 34) no Hoare annotation was computed. [2019-10-13 19:53:08,995 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 5 34) the Hoare annotation is: true [2019-10-13 19:53:08,995 INFO L443 ceAbstractionStarter]: For program point L30-2(lines 30 32) no Hoare annotation was computed. [2019-10-13 19:53:08,995 INFO L439 ceAbstractionStarter]: At program point L30-3(lines 30 32) the Hoare annotation is: false [2019-10-13 19:53:08,995 INFO L443 ceAbstractionStarter]: For program point L30-4(lines 30 32) no Hoare annotation was computed. [2019-10-13 19:53:08,996 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-10-13 19:53:08,996 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-10-13 19:53:08,996 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 20) no Hoare annotation was computed. [2019-10-13 19:53:08,996 INFO L443 ceAbstractionStarter]: For program point L18-2(lines 18 20) no Hoare annotation was computed. [2019-10-13 19:53:08,996 INFO L443 ceAbstractionStarter]: For program point L2-1(line 2) no Hoare annotation was computed. [2019-10-13 19:53:08,996 INFO L443 ceAbstractionStarter]: For program point L2-3(line 2) no Hoare annotation was computed. [2019-10-13 19:53:08,997 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2019-10-13 19:53:08,997 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2019-10-13 19:53:08,997 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2019-10-13 19:53:08,997 INFO L443 ceAbstractionStarter]: For program point L2(line 2) no Hoare annotation was computed. [2019-10-13 19:53:09,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:53:09 BoogieIcfgContainer [2019-10-13 19:53:09,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:53:09,012 INFO L168 Benchmark]: Toolchain (without parser) took 2196.04 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 101.6 MB in the beginning and 87.3 MB in the end (delta: 14.3 MB). Peak memory consumption was 70.9 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,013 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-10-13 19:53:09,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 436.82 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 101.6 MB in the beginning and 179.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,019 INFO L168 Benchmark]: Boogie Preprocessor took 68.59 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,020 INFO L168 Benchmark]: RCFGBuilder took 331.45 ms. Allocated memory is still 200.8 MB. Free memory was 177.3 MB in the beginning and 160.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,021 INFO L168 Benchmark]: TraceAbstraction took 1354.80 ms. Allocated memory is still 200.8 MB. Free memory was 160.8 MB in the beginning and 87.3 MB in the end (delta: 73.6 MB). Peak memory consumption was 73.6 MB. Max. memory is 7.1 GB. [2019-10-13 19:53:09,029 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 144.2 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 436.82 ms. Allocated memory was 144.2 MB in the beginning and 200.8 MB in the end (delta: 56.6 MB). Free memory was 101.6 MB in the beginning and 179.7 MB in the end (delta: -78.1 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 68.59 ms. Allocated memory is still 200.8 MB. Free memory was 179.7 MB in the beginning and 177.3 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.45 ms. Allocated memory is still 200.8 MB. Free memory was 177.3 MB in the beginning and 160.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1354.80 ms. Allocated memory is still 200.8 MB. Free memory was 160.8 MB in the beginning and 87.3 MB in the end (delta: 73.6 MB). Peak memory consumption was 73.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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: 30]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 33 locations, 1 error locations. Result: SAFE, OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 145 SDtfs, 11 SDslu, 87 SDs, 0 SdLazy, 13 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 19 PreInvPairs, 19 NumberOfFragments, 10 HoareAnnotationTreeSize, 19 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 10 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 2742 SizeOfPredicates, 1 NumberOfNonLiveVariables, 91 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 6/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 90, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.881578947368421, AVG_VARS_REMOVED_DURING_WEAKENING: 1.105263157894737, AVG_WEAKENED_CONJUNCTS: 0.3157894736842105, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...