/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_init9_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:25:01,097 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:25:01,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:25:01,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:25:01,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:25:01,150 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:25:01,151 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:25:01,152 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:25:01,153 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:25:01,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:25:01,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:25:01,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:25:01,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:25:01,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:25:01,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:25:01,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:25:01,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:25:01,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:25:01,183 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 01:25:01,212 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:25:01,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:25:01,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:25:01,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:25:01,215 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:25:01,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:25:01,215 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:25:01,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:25:01,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:25:01,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:25:01,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:25:01,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:25:01,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:25:01,217 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:25:01,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:25:01,218 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:25:01,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:25:01,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:25:01,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:25:01,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:25:01,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:25:01,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:25:01,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:25:01,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:25:01,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:25:01,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:25:01,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:25:01,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:25:01,220 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 01:25:01,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:25:01,542 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:25:01,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:25:01,547 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:25:01,547 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:25:01,548 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-11-07 01:25:01,610 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e993566ac/52b68080c5e040f6a9b0eadaa9481267/FLAG64719e714 [2019-11-07 01:25:02,124 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:25:02,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init9_ground-1.i [2019-11-07 01:25:02,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e993566ac/52b68080c5e040f6a9b0eadaa9481267/FLAG64719e714 [2019-11-07 01:25:02,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e993566ac/52b68080c5e040f6a9b0eadaa9481267 [2019-11-07 01:25:02,570 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:25:02,573 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:25:02,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:25:02,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:25:02,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:25:02,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:02" (1/1) ... [2019-11-07 01:25:02,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66940745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:02, skipping insertion in model container [2019-11-07 01:25:02,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:02" (1/1) ... [2019-11-07 01:25:02,617 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:25:02,643 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:25:03,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:25:03,040 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:25:03,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:25:03,176 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:25:03,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03 WrapperNode [2019-11-07 01:25:03,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:25:03,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:25:03,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:25:03,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:25:03,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (1/1) ... [2019-11-07 01:25:03,190 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (1/1) ... [2019-11-07 01:25:03,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (1/1) ... [2019-11-07 01:25:03,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (1/1) ... [2019-11-07 01:25:03,207 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (1/1) ... [2019-11-07 01:25:03,215 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (1/1) ... [2019-11-07 01:25:03,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (1/1) ... [2019-11-07 01:25:03,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:25:03,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:25:03,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:25:03,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:25:03,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (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 01:25:03,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:25:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:25:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:25:03,287 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:25:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:25:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:25:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:25:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:25:03,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:25:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:25:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:25:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:25:03,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:25:03,731 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:25:03,731 INFO L284 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-07 01:25:03,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:03 BoogieIcfgContainer [2019-11-07 01:25:03,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:25:03,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:25:03,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:25:03,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:25:03,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:02" (1/3) ... [2019-11-07 01:25:03,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfaab2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:03, skipping insertion in model container [2019-11-07 01:25:03,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:03" (2/3) ... [2019-11-07 01:25:03,740 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dfaab2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:25:03, skipping insertion in model container [2019-11-07 01:25:03,740 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:25:03" (3/3) ... [2019-11-07 01:25:03,741 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2019-11-07 01:25:03,751 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:25:03,757 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:25:03,769 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:25:03,793 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:25:03,793 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:25:03,793 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:25:03,793 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:25:03,794 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:25:03,794 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:25:03,794 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:25:03,794 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:25:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-07 01:25:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-07 01:25:03,816 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:03,817 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:03,818 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1757541528, now seen corresponding path program 1 times [2019-11-07 01:25:03,830 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:03,830 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623292938] [2019-11-07 01:25:03,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:03,998 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 01:25:03,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623292938] [2019-11-07 01:25:04,000 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:25:04,001 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:25:04,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538787149] [2019-11-07 01:25:04,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:25:04,007 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:04,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:25:04,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:25:04,022 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-11-07 01:25:04,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:04,150 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2019-11-07 01:25:04,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:25:04,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-11-07 01:25:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:04,162 INFO L225 Difference]: With dead ends: 55 [2019-11-07 01:25:04,162 INFO L226 Difference]: Without dead ends: 32 [2019-11-07 01:25:04,166 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 01:25:04,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-07 01:25:04,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-07 01:25:04,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-07 01:25:04,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2019-11-07 01:25:04,214 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2019-11-07 01:25:04,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:04,214 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2019-11-07 01:25:04,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:25:04,215 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2019-11-07 01:25:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-07 01:25:04,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:04,216 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, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:04,217 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash -69039878, now seen corresponding path program 1 times [2019-11-07 01:25:04,218 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:04,218 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631678589] [2019-11-07 01:25:04,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:25:04,331 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631678589] [2019-11-07 01:25:04,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226085177] [2019-11-07 01:25:04,332 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 01:25:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:04,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:25:04,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:25:04,439 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:25:04,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033985461] [2019-11-07 01:25:04,527 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:25:04,527 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:04,547 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:04,559 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:04,561 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:04,694 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:05,779 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:05,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:05,802 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:06,206 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:06,207 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:25:06,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807252106] [2019-11-07 01:25:06,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:25:06,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:06,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:25:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:25:06,214 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 17 states. [2019-11-07 01:25:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:07,184 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2019-11-07 01:25:07,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:25:07,184 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2019-11-07 01:25:07,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:07,186 INFO L225 Difference]: With dead ends: 93 [2019-11-07 01:25:07,187 INFO L226 Difference]: Without dead ends: 68 [2019-11-07 01:25:07,188 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:25:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-07 01:25:07,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-11-07 01:25:07,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-07 01:25:07,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2019-11-07 01:25:07,211 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 28 [2019-11-07 01:25:07,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:07,212 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2019-11-07 01:25:07,212 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:25:07,212 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2019-11-07 01:25:07,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-07 01:25:07,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:07,220 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:07,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:07,424 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:07,424 INFO L82 PathProgramCache]: Analyzing trace with hash -384842776, now seen corresponding path program 2 times [2019-11-07 01:25:07,424 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:07,424 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495562040] [2019-11-07 01:25:07,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:07,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:07,636 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-07 01:25:07,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495562040] [2019-11-07 01:25:07,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429759466] [2019-11-07 01:25:07,637 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 01:25:07,770 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:25:07,770 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:07,772 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:25:07,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-07 01:25:07,814 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-11-07 01:25:07,878 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415486495] [2019-11-07 01:25:07,880 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:25:07,880 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:07,880 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:07,881 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:07,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:07,908 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:08,719 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:08,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:08,727 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:09,045 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:09,046 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:25:09,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531479648] [2019-11-07 01:25:09,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:25:09,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:09,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:25:09,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:25:09,050 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 23 states. [2019-11-07 01:25:10,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:10,267 INFO L93 Difference]: Finished difference Result 171 states and 242 transitions. [2019-11-07 01:25:10,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:25:10,268 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 55 [2019-11-07 01:25:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:10,271 INFO L225 Difference]: With dead ends: 171 [2019-11-07 01:25:10,271 INFO L226 Difference]: Without dead ends: 122 [2019-11-07 01:25:10,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:25:10,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-07 01:25:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2019-11-07 01:25:10,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-07 01:25:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2019-11-07 01:25:10,305 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 55 [2019-11-07 01:25:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:10,305 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2019-11-07 01:25:10,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:25:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2019-11-07 01:25:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-07 01:25:10,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:10,311 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:10,516 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:10,516 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 471908520, now seen corresponding path program 3 times [2019-11-07 01:25:10,517 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:10,517 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680722202] [2019-11-07 01:25:10,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:10,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-11-07 01:25:10,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680722202] [2019-11-07 01:25:10,764 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540856591] [2019-11-07 01:25:10,764 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 01:25:10,874 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:25:10,874 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:10,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:25:10,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-11-07 01:25:10,927 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:11,147 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-11-07 01:25:11,147 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310770817] [2019-11-07 01:25:11,149 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:25:11,149 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:11,150 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:11,150 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:11,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:11,165 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:11,664 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:11,669 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:11,671 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:12,013 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:12,013 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:25:12,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139819972] [2019-11-07 01:25:12,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:25:12,015 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:12,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:25:12,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:25:12,017 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 35 states. [2019-11-07 01:25:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:14,496 INFO L93 Difference]: Finished difference Result 327 states and 452 transitions. [2019-11-07 01:25:14,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:25:14,501 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 109 [2019-11-07 01:25:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:14,507 INFO L225 Difference]: With dead ends: 327 [2019-11-07 01:25:14,508 INFO L226 Difference]: Without dead ends: 230 [2019-11-07 01:25:14,516 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 307 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:25:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-11-07 01:25:14,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2019-11-07 01:25:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-07 01:25:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2019-11-07 01:25:14,577 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 109 [2019-11-07 01:25:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:14,578 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2019-11-07 01:25:14,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:25:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2019-11-07 01:25:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-07 01:25:14,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:14,582 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:14,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:14,786 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:14,787 INFO L82 PathProgramCache]: Analyzing trace with hash -324154840, now seen corresponding path program 4 times [2019-11-07 01:25:14,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:14,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133367527] [2019-11-07 01:25:14,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:15,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-11-07 01:25:15,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133367527] [2019-11-07 01:25:15,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177428017] [2019-11-07 01:25:15,431 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 01:25:15,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:15,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:25:15,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-11-07 01:25:15,665 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2019-11-07 01:25:16,317 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472102407] [2019-11-07 01:25:16,318 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-11-07 01:25:16,319 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:16,319 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:16,319 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:16,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:16,339 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:16,778 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:16,783 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:16,784 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:17,225 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:17,226 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:25:17,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634280195] [2019-11-07 01:25:17,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:25:17,228 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:25:17,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:25:17,231 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 59 states. [2019-11-07 01:25:22,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:22,898 INFO L93 Difference]: Finished difference Result 639 states and 872 transitions. [2019-11-07 01:25:22,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:25:22,899 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 217 [2019-11-07 01:25:22,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:22,902 INFO L225 Difference]: With dead ends: 639 [2019-11-07 01:25:22,903 INFO L226 Difference]: Without dead ends: 446 [2019-11-07 01:25:22,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 619 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:25:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2019-11-07 01:25:22,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 437. [2019-11-07 01:25:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-11-07 01:25:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 446 transitions. [2019-11-07 01:25:22,952 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 446 transitions. Word has length 217 [2019-11-07 01:25:22,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:22,952 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 446 transitions. [2019-11-07 01:25:22,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:25:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 446 transitions. [2019-11-07 01:25:22,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2019-11-07 01:25:22,962 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:22,962 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:23,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:23,168 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:23,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2107907368, now seen corresponding path program 5 times [2019-11-07 01:25:23,168 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:23,173 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386858350] [2019-11-07 01:25:23,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9729 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 8648 trivial. 0 not checked. [2019-11-07 01:25:25,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386858350] [2019-11-07 01:25:25,101 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436739015] [2019-11-07 01:25:25,101 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