/usr/bin/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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 04:03:35,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:03:35,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:03:35,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:03:35,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:03:35,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:03:35,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:03:35,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:03:35,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:03:35,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:03:35,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:03:35,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:03:35,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:03:35,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:03:35,518 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:03:35,520 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:03:35,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:03:35,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:03:35,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:03:35,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:03:35,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:03:35,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:03:35,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:03:35,531 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:03:35,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:03:35,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:03:35,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:03:35,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:03:35,543 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 [2019-11-07 04:03:35,564 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:03:35,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:03:35,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:03:35,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:03:35,566 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:03:35,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:03:35,567 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:03:35,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:03:35,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:03:35,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:03:35,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:03:35,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:03:35,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:03:35,568 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:03:35,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:03:35,569 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:03:35,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:03:35,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:03:35,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:03:35,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:03:35,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:03:35,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:03:35,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:03:35,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:03:35,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:03:35,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:03:35,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:03:35,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:03:35,571 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-11-07 04:03:35,847 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:03:35,858 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:03:35,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:03:35,862 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:03:35,863 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:03:35,863 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2019-11-07 04:03:35,923 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6befe5a37/730ea64f460b46b28449b9e0ed3f5100/FLAG358a1abc2 [2019-11-07 04:03:36,390 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:03:36,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2019-11-07 04:03:36,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6befe5a37/730ea64f460b46b28449b9e0ed3f5100/FLAG358a1abc2 [2019-11-07 04:03:36,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6befe5a37/730ea64f460b46b28449b9e0ed3f5100 [2019-11-07 04:03:36,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:03:36,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:03:36,797 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:36,797 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:03:36,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:03:36,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:36" (1/1) ... [2019-11-07 04:03:36,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e92733 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:36, skipping insertion in model container [2019-11-07 04:03:36,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:03:36" (1/1) ... [2019-11-07 04:03:36,835 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:03:36,866 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:03:37,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:37,135 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:03:37,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:03:37,263 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:03:37,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37 WrapperNode [2019-11-07 04:03:37,264 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:03:37,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:03:37,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:03:37,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:03:37,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (1/1) ... [2019-11-07 04:03:37,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (1/1) ... [2019-11-07 04:03:37,282 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (1/1) ... [2019-11-07 04:03:37,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (1/1) ... [2019-11-07 04:03:37,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (1/1) ... [2019-11-07 04:03:37,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (1/1) ... [2019-11-07 04:03:37,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (1/1) ... [2019-11-07 04:03:37,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:03:37,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:03:37,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:03:37,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:03:37,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (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 [2019-11-07 04:03:37,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:03:37,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:03:37,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:03:37,358 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:03:37,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:03:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:03:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:03:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-07 04:03:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:03:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 04:03:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 04:03:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 04:03:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 04:03:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:03:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:03:37,801 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:03:37,801 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-07 04:03:37,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:37 BoogieIcfgContainer [2019-11-07 04:03:37,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:03:37,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:03:37,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:03:37,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:03:37,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:03:36" (1/3) ... [2019-11-07 04:03:37,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288ada8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:37, skipping insertion in model container [2019-11-07 04:03:37,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:03:37" (2/3) ... [2019-11-07 04:03:37,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@288ada8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:03:37, skipping insertion in model container [2019-11-07 04:03:37,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:03:37" (3/3) ... [2019-11-07 04:03:37,812 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2019-11-07 04:03:37,822 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:03:37,830 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:03:37,841 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:03:37,865 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:03:37,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:03:37,865 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:03:37,865 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:03:37,866 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:03:37,866 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:03:37,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:03:37,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:03:37,882 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-07 04:03:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-07 04:03:37,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:37,889 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:37,891 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:37,896 INFO L82 PathProgramCache]: Analyzing trace with hash 176718902, now seen corresponding path program 1 times [2019-11-07 04:03:37,904 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:37,904 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051269375] [2019-11-07 04:03:37,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:37,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:38,042 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051269375] [2019-11-07 04:03:38,043 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:38,044 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 04:03:38,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326125187] [2019-11-07 04:03:38,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 04:03:38,051 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:38,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 04:03:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:03:38,070 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-11-07 04:03:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:38,097 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2019-11-07 04:03:38,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 04:03:38,099 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2019-11-07 04:03:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:38,107 INFO L225 Difference]: With dead ends: 45 [2019-11-07 04:03:38,108 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 04:03:38,114 INFO L630 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 [2019-11-07 04:03:38,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 04:03:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 04:03:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 04:03:38,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-07 04:03:38,163 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 18 [2019-11-07 04:03:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:38,163 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-07 04:03:38,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 04:03:38,164 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-07 04:03:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 04:03:38,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:38,165 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:38,165 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1184471636, now seen corresponding path program 1 times [2019-11-07 04:03:38,166 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:38,166 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506670594] [2019-11-07 04:03:38,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:03:38,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506670594] [2019-11-07 04:03:38,254 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:03:38,254 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 04:03:38,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878900147] [2019-11-07 04:03:38,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 04:03:38,262 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:38,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 04:03:38,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 04:03:38,263 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 3 states. [2019-11-07 04:03:38,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:38,304 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2019-11-07 04:03:38,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 04:03:38,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-11-07 04:03:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:38,309 INFO L225 Difference]: With dead ends: 40 [2019-11-07 04:03:38,309 INFO L226 Difference]: Without dead ends: 25 [2019-11-07 04:03:38,310 INFO L630 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 [2019-11-07 04:03:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-07 04:03:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-11-07 04:03:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-07 04:03:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-07 04:03:38,318 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 20 [2019-11-07 04:03:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:38,318 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-07 04:03:38,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 04:03:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-07 04:03:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-07 04:03:38,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:38,320 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:38,320 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:38,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1352731196, now seen corresponding path program 1 times [2019-11-07 04:03:38,321 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:38,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136673850] [2019-11-07 04:03:38,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 04:03:38,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136673850] [2019-11-07 04:03:38,441 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667255902] [2019-11-07 04:03:38,441 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 [2019-11-07 04:03:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:38,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:03:38,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 04:03:38,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-07 04:03:38,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1341697022] [2019-11-07 04:03:38,705 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-11-07 04:03:38,705 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:38,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:38,727 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:38,728 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:38,886 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:03:39,184 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-11-07 04:03:39,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:03:39,199 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:39,884 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 04:03:39,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [4, 4, 4] total 24 [2019-11-07 04:03:39,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750760296] [2019-11-07 04:03:39,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-07 04:03:39,886 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-07 04:03:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2019-11-07 04:03:39,888 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 19 states. [2019-11-07 04:03:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:40,667 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-11-07 04:03:40,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-07 04:03:40,668 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-11-07 04:03:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:40,669 INFO L225 Difference]: With dead ends: 44 [2019-11-07 04:03:40,669 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 04:03:40,671 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=211, Invalid=1195, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 04:03:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 04:03:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2019-11-07 04:03:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 04:03:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-07 04:03:40,679 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2019-11-07 04:03:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:40,679 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-07 04:03:40,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-07 04:03:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-07 04:03:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 04:03:40,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:40,680 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:40,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:40,882 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:40,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1780369353, now seen corresponding path program 1 times [2019-11-07 04:03:40,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:40,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488245644] [2019-11-07 04:03:40,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:03:40,988 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488245644] [2019-11-07 04:03:40,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445536779] [2019-11-07 04:03:40,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:41,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:03:41,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:41,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:03:41,037 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:03:41,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357856319] [2019-11-07 04:03:41,066 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-11-07 04:03:41,066 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:41,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:41,067 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:41,067 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:41,097 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:03:41,279 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-11-07 04:03:41,286 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:03:41,288 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:41,749 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 04:03:41,750 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 23 [2019-11-07 04:03:41,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112759820] [2019-11-07 04:03:41,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 04:03:41,751 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:41,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 04:03:41,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2019-11-07 04:03:41,752 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 18 states. [2019-11-07 04:03:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:42,381 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-07 04:03:42,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-07 04:03:42,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-11-07 04:03:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:42,384 INFO L225 Difference]: With dead ends: 43 [2019-11-07 04:03:42,384 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 04:03:42,385 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 04:03:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 04:03:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-11-07 04:03:42,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-07 04:03:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2019-11-07 04:03:42,392 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24 [2019-11-07 04:03:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:42,392 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2019-11-07 04:03:42,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 04:03:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2019-11-07 04:03:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 04:03:42,393 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:42,394 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:42,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:42,602 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:42,603 INFO L82 PathProgramCache]: Analyzing trace with hash -207415457, now seen corresponding path program 1 times [2019-11-07 04:03:42,603 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:42,603 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379361591] [2019-11-07 04:03:42,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:03:42,678 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379361591] [2019-11-07 04:03:42,678 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556584463] [2019-11-07 04:03:42,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:42,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:03:42,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:03:42,734 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:42,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-07 04:03:42,749 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002129316] [2019-11-07 04:03:42,750 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-11-07 04:03:42,751 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:42,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:42,752 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:42,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:42,796 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:03:42,969 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 12 for LOIs [2019-11-07 04:03:42,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:03:42,976 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:43,338 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 04:03:43,338 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [4, 4, 4] total 23 [2019-11-07 04:03:43,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208769635] [2019-11-07 04:03:43,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-07 04:03:43,339 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-07 04:03:43,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2019-11-07 04:03:43,340 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 18 states. [2019-11-07 04:03:43,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:43,912 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2019-11-07 04:03:43,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-07 04:03:43,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 24 [2019-11-07 04:03:43,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:43,913 INFO L225 Difference]: With dead ends: 40 [2019-11-07 04:03:43,914 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 04:03:43,915 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 04:03:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 04:03:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-07 04:03:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 04:03:43,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-07 04:03:43,920 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2019-11-07 04:03:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:43,921 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-07 04:03:43,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-07 04:03:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-07 04:03:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-07 04:03:43,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:43,922 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:44,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:44,123 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1377800540, now seen corresponding path program 1 times [2019-11-07 04:03:44,124 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:44,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666091815] [2019-11-07 04:03:44,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:44,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:03:44,201 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666091815] [2019-11-07 04:03:44,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727454220] [2019-11-07 04:03:44,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:44,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:03:44,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:03:44,272 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-07 04:03:44,289 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943337372] [2019-11-07 04:03:44,291 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-11-07 04:03:44,291 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:44,292 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:44,292 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:44,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:44,325 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:03:44,539 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-11-07 04:03:44,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:03:44,548 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:45,029 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 04:03:45,029 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [4, 4, 4] total 21 [2019-11-07 04:03:45,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545464351] [2019-11-07 04:03:45,030 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-07 04:03:45,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-07 04:03:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2019-11-07 04:03:45,032 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 16 states. [2019-11-07 04:03:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:45,465 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2019-11-07 04:03:45,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 04:03:45,466 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-11-07 04:03:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:45,467 INFO L225 Difference]: With dead ends: 35 [2019-11-07 04:03:45,468 INFO L226 Difference]: Without dead ends: 30 [2019-11-07 04:03:45,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2019-11-07 04:03:45,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-07 04:03:45,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-11-07 04:03:45,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 04:03:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-07 04:03:45,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 26 [2019-11-07 04:03:45,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:45,475 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-07 04:03:45,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-07 04:03:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-07 04:03:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-07 04:03:45,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:03:45,476 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:03:45,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:45,679 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:03:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:03:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash 301099668, now seen corresponding path program 1 times [2019-11-07 04:03:45,680 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:03:45,680 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59237958] [2019-11-07 04:03:45,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:03:45,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:03:45,793 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59237958] [2019-11-07 04:03:45,794 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068710418] [2019-11-07 04:03:45,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:03:45,845 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 04:03:45,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:03:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:03:45,863 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:03:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 04:03:45,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119659747] [2019-11-07 04:03:45,889 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-11-07 04:03:45,890 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:03:45,890 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:03:45,890 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:03:45,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:03:45,911 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 04:03:46,116 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2019-11-07 04:03:46,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 04:03:46,120 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:03:46,497 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 04:03:46,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 20 [2019-11-07 04:03:46,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986644603] [2019-11-07 04:03:46,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-07 04:03:46,500 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:03:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-07 04:03:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2019-11-07 04:03:46,501 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 15 states. [2019-11-07 04:03:47,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:03:47,080 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-07 04:03:47,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-07 04:03:47,080 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2019-11-07 04:03:47,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:03:47,081 INFO L225 Difference]: With dead ends: 28 [2019-11-07 04:03:47,081 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 04:03:47,082 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2019-11-07 04:03:47,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 04:03:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 04:03:47,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 04:03:47,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 04:03:47,083 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2019-11-07 04:03:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:03:47,083 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 04:03:47,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-07 04:03:47,084 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 04:03:47,084 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 04:03:47,284 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:03:47,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 04:03:47,723 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-11-07 04:03:47,723 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:03:47,723 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 04:03:47,723 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |#NULL.offset|)) [2019-11-07 04:03:47,723 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 04:03:47,724 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 04:03:47,724 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 14 58) no Hoare annotation was computed. [2019-11-07 04:03:47,724 INFO L439 ceAbstractionStarter]: At program point L23-3(lines 23 24) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (and (<= 0 main_~i~0) (= 0 (select |#valid| 0))) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-11-07 04:03:47,724 INFO L439 ceAbstractionStarter]: At program point L19-3(lines 19 20) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (and (<= 0 main_~i~0) (= 0 (select |#valid| 0))) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-11-07 04:03:47,724 INFO L443 ceAbstractionStarter]: For program point L32-1(lines 32 33) no Hoare annotation was computed. [2019-11-07 04:03:47,725 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 33) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0)) (and (<= 0 main_~nc_A~0) (or (= (select (select |#memory_int| |main_~#string_B~0.base|) (+ |main_~#string_B~0.offset| 4)) 0) (<= 1 main_~nc_A~0)) (<= 5 main_~i~0) (= 0 (select |#valid| 0)) (or (= main_~nc_B~0 0) (<= 1 main_~nc_B~0)))) [2019-11-07 04:03:47,725 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 15 58) no Hoare annotation was computed. [2019-11-07 04:03:47,725 INFO L443 ceAbstractionStarter]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2019-11-07 04:03:47,725 INFO L439 ceAbstractionStarter]: At program point L28-3(lines 28 29) the Hoare annotation is: (let ((.cse0 (<= 5 main_~i~0)) (.cse1 (= 0 (select |#valid| 0)))) (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (and (<= 1 main_~nc_A~0) .cse0 .cse1) (and .cse0 .cse1 (= (select (select |#memory_int| |main_~#string_B~0.base|) (+ |main_~#string_B~0.offset| 4)) 0) (= main_~nc_A~0 0)) (not (<= |#NULL.base| 0)))) [2019-11-07 04:03:47,725 INFO L443 ceAbstractionStarter]: For program point L28-4(lines 28 29) no Hoare annotation was computed. [2019-11-07 04:03:47,725 INFO L439 ceAbstractionStarter]: At program point L41-2(lines 39 51) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (= 0 (select |#valid| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-11-07 04:03:47,726 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-11-07 04:03:47,726 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-11-07 04:03:47,726 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 14 58) no Hoare annotation was computed. [2019-11-07 04:03:47,726 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 14 58) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (and (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (= |old(#length)| |#length|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0))) [2019-11-07 04:03:47,726 INFO L439 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (or (not (<= |#NULL.offset| 0)) (not (<= 0 |#NULL.base|)) (not (= 0 (select |old(#valid)| 0))) (not (<= 0 |#NULL.offset|)) (not (<= |#NULL.base| 0)) (and (or (<= main_~nc_B~0 main_~j~0) (<= main_~nc_A~0 main_~i~0)) (= 0 (select |#valid| 0)) (= (ite (< main_~nc_B~0 (+ main_~j~0 1)) 1 0) main_~found~0))) [2019-11-07 04:03:47,726 INFO L443 ceAbstractionStarter]: For program point L55-1(line 55) no Hoare annotation was computed. [2019-11-07 04:03:47,727 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-11-07 04:03:47,727 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2019-11-07 04:03:47,727 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2019-11-07 04:03:47,727 INFO L443 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-11-07 04:03:47,727 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-11-07 04:03:47,727 INFO L443 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2019-11-07 04:03:47,735 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,736 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,736 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,736 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,742 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,742 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,742 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,742 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,744 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,745 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,745 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,745 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,745 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-07 04:03:47,746 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,746 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,747 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,747 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,747 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-07 04:03:47,748 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,748 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,749 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,749 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-07 04:03:47,749 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,750 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,750 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,750 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,751 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-07 04:03:47,751 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,752 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,752 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,752 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,752 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,755 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,755 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,755 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,755 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,759 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,759 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,760 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,760 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,760 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,760 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,761 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,761 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:03:47 BoogieIcfgContainer [2019-11-07 04:03:47,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 04:03:47,774 INFO L168 Benchmark]: Toolchain (without parser) took 10991.44 ms. Allocated memory was 144.2 MB in the beginning and 310.9 MB in the end (delta: 166.7 MB). Free memory was 101.8 MB in the beginning and 170.6 MB in the end (delta: -68.8 MB). Peak memory consumption was 98.0 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:47,775 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-11-07 04:03:47,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 468.02 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 179.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:47,776 INFO L168 Benchmark]: Boogie Preprocessor took 39.27 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 177.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:47,778 INFO L168 Benchmark]: RCFGBuilder took 499.34 ms. Allocated memory is still 200.8 MB. Free memory was 177.3 MB in the beginning and 153.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:47,779 INFO L168 Benchmark]: TraceAbstraction took 9966.28 ms. Allocated memory was 200.8 MB in the beginning and 310.9 MB in the end (delta: 110.1 MB). Free memory was 153.2 MB in the beginning and 170.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 92.8 MB. Max. memory is 7.1 GB. [2019-11-07 04:03:47,784 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 468.02 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 179.8 MB in the end (delta: -78.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.27 ms. Allocated memory is still 200.8 MB. Free memory was 179.8 MB in the beginning and 177.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 499.34 ms. Allocated memory is still 200.8 MB. Free memory was 177.3 MB in the beginning and 153.2 MB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9966.28 ms. Allocated memory was 200.8 MB in the beginning and 310.9 MB in the end (delta: 110.1 MB). Free memory was 153.2 MB in the beginning and 170.6 MB in the end (delta: -17.3 MB). Peak memory consumption was 92.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #memory_int - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL - GenericResult: Unfinished Backtranslation unknown boogie variable #NULL * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 39]: Loop Invariant [2019-11-07 04:03:47,799 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,799 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,799 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,800 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,800 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,800 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,801 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,801 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((!(#NULL <= 0) || 0 == \valid[0]) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0) - InvariantResult [Line: 32]: Loop Invariant [2019-11-07 04:03:47,801 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,802 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,802 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,802 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,803 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-07 04:03:47,803 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,803 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,803 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,804 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,805 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int Derived loop invariant: ((((!(#NULL <= 0) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0)) || ((((0 <= nc_A && (unknown-#memory_int-unknown[string_B][string_B + 4] == 0 || 1 <= nc_A)) && 5 <= i) && 0 == \valid[0]) && (nc_B == 0 || 1 <= nc_B)) - InvariantResult [Line: 28]: Loop Invariant [2019-11-07 04:03:47,805 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,806 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,806 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,806 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-07 04:03:47,806 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,807 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,807 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,807 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,807 WARN L1295 BoogieBacktranslator]: unknown boogie variable #memory_int [2019-11-07 04:03:47,808 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: (((((!(#NULL <= 0) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || ((1 <= nc_A && 5 <= i) && 0 == \valid[0])) || (((5 <= i && 0 == \valid[0]) && unknown-#memory_int-unknown[string_B][string_B + 4] == 0) && nc_A == 0)) || !(#NULL <= 0) - InvariantResult [Line: 23]: Loop Invariant [2019-11-07 04:03:47,808 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,811 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,811 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,811 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,813 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,813 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,813 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,814 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((!(#NULL <= 0) || (0 <= i && 0 == \valid[0])) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0) - InvariantResult [Line: 19]: Loop Invariant [2019-11-07 04:03:47,815 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,815 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,815 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,816 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,817 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,817 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,817 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL [2019-11-07 04:03:47,817 WARN L1295 BoogieBacktranslator]: unknown boogie variable #NULL Derived loop invariant: ((((!(#NULL <= 0) || (0 <= i && 0 == \valid[0])) || !(0 <= #NULL)) || !(0 == \old(\valid)[0])) || !(0 <= #NULL)) || !(#NULL <= 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 9.8s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 3.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, HoareTripleCheckerStatistics: 96 SDtfs, 225 SDslu, 174 SDs, 0 SdLazy, 814 SolverSat, 171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 286 SyntacticMatches, 6 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 20 PreInvPairs, 39 NumberOfFragments, 312 HoareAnnotationTreeSize, 20 FomulaSimplifications, 2579 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 662 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 284 NumberOfCodeBlocks, 284 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 10504 SizeOfPredicates, 5 NumberOfNonLiveVariables, 518 ConjunctsInSsa, 15 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 54/69 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 1433, ICFG_INTERPRETER_ENTERED_PROCEDURES: 20, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 100, DAG_INTERPRETER_EARLY_EXITS: 5, TOOLS_POST_APPLICATIONS: 152, TOOLS_POST_TIME[ms]: 491, TOOLS_POST_CALL_APPLICATIONS: 25, TOOLS_POST_CALL_TIME[ms]: 58, TOOLS_POST_RETURN_APPLICATIONS: 10, TOOLS_POST_RETURN_TIME[ms]: 9, TOOLS_QUANTIFIERELIM_APPLICATIONS: 187, TOOLS_QUANTIFIERELIM_TIME[ms]: 504, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 58, FLUID_QUERY_TIME[ms]: 13, FLUID_QUERIES: 415, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 16, DOMAIN_JOIN_TIME[ms]: 111, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 31, DOMAIN_WIDEN_TIME[ms]: 302, DOMAIN_ISSUBSETEQ_APPLICATIONS: 48, DOMAIN_ISSUBSETEQ_TIME[ms]: 119, DOMAIN_ISBOTTOM_APPLICATIONS: 100, DOMAIN_ISBOTTOM_TIME[ms]: 144, LOOP_SUMMARIZER_APPLICATIONS: 17, LOOP_SUMMARIZER_CACHE_MISSES: 17, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 824, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 823, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 48, CALL_SUMMARIZER_APPLICATIONS: 10, CALL_SUMMARIZER_CACHE_MISSES: 5, CALL_SUMMARIZER_OVERALL_TIME[ms]: 77, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 77, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 14, PATH_EXPR_TIME[ms]: 8, REGEX_TO_DAG_TIME[ms]: 11, DAG_COMPRESSION_TIME[ms]: 62, DAG_COMPRESSION_PROCESSED_NODES: 1043, DAG_COMPRESSION_RETAINED_NODES: 363, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...