/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/array-examples/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:25:41,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:25:41,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:25:41,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 01:25:41,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:25:41,243 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:25:41,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:25:41,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:25:41,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:25:41,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:25:41,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:25:41,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:25:41,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:25:41,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:25:41,270 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:25:41,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:25:41,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:25:41,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:25:41,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:25:41,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:25:41,288 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 01:25:41,308 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:25:41,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:25:41,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:25:41,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:25:41,311 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:25:41,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:25:41,311 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:25:41,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:25:41,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:25:41,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:25:41,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:25:41,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:25:41,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:25:41,314 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:25:41,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:25:41,315 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:25:41,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:25:41,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:25:41,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:25:41,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:25:41,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:25:41,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:25:41,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:25:41,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:25:41,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:25:41,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:25:41,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:25:41,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:25:41,317 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 01:25:41,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:25:41,655 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:25:41,658 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:25:41,660 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:25:41,660 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:25:41,661 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-11-07 01:25:41,736 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2431dc388/2f4f28eab48d4fa89cdf12bad03b8bee/FLAG9db1cbe4e [2019-11-07 01:25:42,209 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:25:42,210 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-11-07 01:25:42,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2431dc388/2f4f28eab48d4fa89cdf12bad03b8bee/FLAG9db1cbe4e [2019-11-07 01:25:42,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2431dc388/2f4f28eab48d4fa89cdf12bad03b8bee [2019-11-07 01:25:42,641 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:25:42,643 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:25:42,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:25:42,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:25:42,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:25:42,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:42,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@150a0e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42, skipping insertion in model container [2019-11-07 01:25:42,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:42,661 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:25:42,678 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:25:42,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:25:42,861 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:25:42,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:25:42,896 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:25:42,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42 WrapperNode [2019-11-07 01:25:42,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:25:42,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:25:42,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:25:42,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:25:43,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:43,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:43,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:43,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:43,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:43,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:43,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (1/1) ... [2019-11-07 01:25:43,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:25:43,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:25:43,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:25:43,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:25:43,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (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 01:25:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:25:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:25:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:25:43,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:25:43,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:25:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:25:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:25:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:25:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:25:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:25:43,087 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:25:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:25:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:25:43,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:25:43,478 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:25:43,478 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:25:43,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:43 BoogieIcfgContainer [2019-11-07 01:25:43,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:25:43,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:25:43,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:25:43,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:25:43,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:42" (1/3) ... [2019-11-07 01:25:43,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae5e266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:43, skipping insertion in model container [2019-11-07 01:25:43,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:42" (2/3) ... [2019-11-07 01:25:43,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ae5e266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:43, skipping insertion in model container [2019-11-07 01:25:43,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:43" (3/3) ... [2019-11-07 01:25:43,488 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2019-11-07 01:25:43,498 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:25:43,506 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:25:43,515 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:25:43,536 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:25:43,536 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:25:43,536 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:25:43,536 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:25:43,537 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:25:43,537 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:25:43,537 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:25:43,537 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:25:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-11-07 01:25:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-07 01:25:43,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:43,563 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:43,565 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:43,571 INFO L82 PathProgramCache]: Analyzing trace with hash -242987165, now seen corresponding path program 1 times [2019-11-07 01:25:43,581 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:43,581 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692844996] [2019-11-07 01:25:43,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:43,767 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 01:25:43,768 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692844996] [2019-11-07 01:25:43,769 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:25:43,770 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:25:43,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645342836] [2019-11-07 01:25:43,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:25:43,777 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:43,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:25:43,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:25:43,797 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-11-07 01:25:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:43,844 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2019-11-07 01:25:43,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:25:43,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-07 01:25:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:43,857 INFO L225 Difference]: With dead ends: 34 [2019-11-07 01:25:43,858 INFO L226 Difference]: Without dead ends: 18 [2019-11-07 01:25:43,862 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 01:25:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-07 01:25:43,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-07 01:25:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-07 01:25:43,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-11-07 01:25:43,920 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2019-11-07 01:25:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:43,921 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-11-07 01:25:43,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:25:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-11-07 01:25:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 01:25:43,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:43,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:43,924 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:43,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1448285990, now seen corresponding path program 1 times [2019-11-07 01:25:43,926 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:43,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189254939] [2019-11-07 01:25:43,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:44,053 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 01:25:44,053 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189254939] [2019-11-07 01:25:44,054 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552129600] [2019-11-07 01:25:44,054 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 01:25:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:44,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:25:44,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:44,163 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 01:25:44,163 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:44,202 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 01:25:44,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1082646008] [2019-11-07 01:25:44,229 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:44,230 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:44,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:44,244 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:44,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:44,416 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:44,628 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:44,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:44,641 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:44,932 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:44,932 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-11-07 01:25:44,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322674487] [2019-11-07 01:25:44,935 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:25:44,935 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:44,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:25:44,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:25:44,937 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 17 states. [2019-11-07 01:25:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:45,464 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2019-11-07 01:25:45,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:25:45,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-11-07 01:25:45,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:45,468 INFO L225 Difference]: With dead ends: 38 [2019-11-07 01:25:45,468 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 01:25:45,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:25:45,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 01:25:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-07 01:25:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-07 01:25:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-07 01:25:45,504 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-11-07 01:25:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:45,505 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-07 01:25:45,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:25:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-07 01:25:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 01:25:45,506 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:45,506 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:45,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:45,713 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash 119243939, now seen corresponding path program 2 times [2019-11-07 01:25:45,714 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:45,714 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367209790] [2019-11-07 01:25:45,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:25:45,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367209790] [2019-11-07 01:25:45,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440089426] [2019-11-07 01:25:45,889 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 01:25:45,955 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:25:45,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:45,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:25:45,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:25:45,976 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-07 01:25:46,051 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489846351] [2019-11-07 01:25:46,053 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:46,053 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:46,054 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:46,054 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:46,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:46,102 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:46,211 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:46,222 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:46,224 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:46,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:46,439 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-11-07 01:25:46,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143727917] [2019-11-07 01:25:46,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:25:46,440 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:46,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:25:46,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:25:46,441 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 23 states. [2019-11-07 01:25:47,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:47,150 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2019-11-07 01:25:47,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:25:47,151 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 20 [2019-11-07 01:25:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:47,152 INFO L225 Difference]: With dead ends: 53 [2019-11-07 01:25:47,152 INFO L226 Difference]: Without dead ends: 39 [2019-11-07 01:25:47,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=1247, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:25:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-07 01:25:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2019-11-07 01:25:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-07 01:25:47,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-11-07 01:25:47,163 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 20 [2019-11-07 01:25:47,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:47,164 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-11-07 01:25:47,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:25:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-11-07 01:25:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:25:47,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:47,166 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:47,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:47,374 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:47,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:47,374 INFO L82 PathProgramCache]: Analyzing trace with hash 92938371, now seen corresponding path program 3 times [2019-11-07 01:25:47,375 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:47,375 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132096314] [2019-11-07 01:25:47,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:47,538 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:25:47,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132096314] [2019-11-07 01:25:47,539 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537128314] [2019-11-07 01:25:47,540 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 01:25:47,600 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:25:47,600 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:47,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:25:47,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:25:47,629 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-07 01:25:47,830 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305840854] [2019-11-07 01:25:47,831 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:47,831 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:47,832 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:47,832 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:47,832 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:47,876 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:47,986 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:47,993 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:47,995 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:48,237 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:48,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-11-07 01:25:48,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040672788] [2019-11-07 01:25:48,239 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:25:48,239 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:48,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:25:48,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=860, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:25:48,241 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 35 states. [2019-11-07 01:25:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:49,526 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2019-11-07 01:25:49,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:25:49,526 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 32 [2019-11-07 01:25:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:49,527 INFO L225 Difference]: With dead ends: 83 [2019-11-07 01:25:49,528 INFO L226 Difference]: Without dead ends: 63 [2019-11-07 01:25:49,530 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=979, Invalid=3053, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:25:49,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-07 01:25:49,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2019-11-07 01:25:49,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-07 01:25:49,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2019-11-07 01:25:49,543 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 32 [2019-11-07 01:25:49,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:49,543 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2019-11-07 01:25:49,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:25:49,543 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2019-11-07 01:25:49,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 01:25:49,545 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:49,545 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:49,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:49,749 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1097584707, now seen corresponding path program 4 times [2019-11-07 01:25:49,751 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:49,755 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350114124] [2019-11-07 01:25:49,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:49,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:50,236 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:25:50,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350114124] [2019-11-07 01:25:50,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784439681] [2019-11-07 01:25:50,237 INFO L92 rtionOrderModulation]: Changing assertion order to 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 01:25:50,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:50,327 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:25:50,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:50,352 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:25:50,352 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-07 01:25:51,033 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074016348] [2019-11-07 01:25:51,034 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:25:51,034 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:51,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:51,035 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:51,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:51,060 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:51,145 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:25:51,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:51,151 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:51,494 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:51,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-11-07 01:25:51,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029589225] [2019-11-07 01:25:51,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:25:51,496 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:51,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:25:51,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=2216, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:25:51,499 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 59 states. [2019-11-07 01:25:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:54,670 INFO L93 Difference]: Finished difference Result 143 states and 195 transitions. [2019-11-07 01:25:54,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:25:54,670 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 56 [2019-11-07 01:25:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:54,672 INFO L225 Difference]: With dead ends: 143 [2019-11-07 01:25:54,672 INFO L226 Difference]: Without dead ends: 111 [2019-11-07 01:25:54,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2755 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3607, Invalid=8825, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:25:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-07 01:25:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2019-11-07 01:25:54,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-07 01:25:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2019-11-07 01:25:54,693 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 56 [2019-11-07 01:25:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:54,693 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2019-11-07 01:25:54,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:25:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2019-11-07 01:25:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-07 01:25:54,697 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:54,697 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:54,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:54,900 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:54,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:54,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1168568381, now seen corresponding path program 5 times [2019-11-07 01:25:54,902 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:54,905 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486613099] [2019-11-07 01:25:54,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-07 01:25:56,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486613099] [2019-11-07 01:25:56,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290633944] [2019-11-07 01:25:56,177 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 01:26:18,445 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-11-07 01:26:18,446 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:26:18,454 INFO L256 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-07 01:26:18,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:26:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-07 01:26:18,501 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:26:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2019-11-07 01:26:20,962 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [55169496] [2019-11-07 01:26:20,963 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2019-11-07 01:26:20,964 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:26:20,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:26:20,964 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:26:20,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:26:20,987 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:26:21,054 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-11-07 01:26:21,063 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:26:21,065 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:26:21,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:26:21,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 11] total 107 [2019-11-07 01:26:21,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343079712] [2019-11-07 01:26:21,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 107 states [2019-11-07 01:26:21,459 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:26:21,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2019-11-07 01:26:21,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4686, Invalid=6656, Unknown=0, NotChecked=0, Total=11342 [2019-11-07 01:26:21,464 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 107 states.