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_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:33:17,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:33:17,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:33:17,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:33:17,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:33:17,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:33:17,991 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:33:17,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:33:18,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:33:18,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:33:18,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:33:18,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:33:18,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:33:18,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:33:18,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:33:18,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:33:18,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:33:18,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:33:18,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:33:18,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:33:18,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:33:18,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:33:18,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:33:18,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:33:18,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:33:18,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:33:18,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:33:18,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:33:18,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:33:18,050 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:33:18,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:33:18,052 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:33:18,052 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:33:18,052 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:33:18,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:33:18,053 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:33:18,053 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:33:18,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:33:18,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:33:18,054 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:33:18,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:33:18,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:33:18,054 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:33:18,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:33:18,054 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:33:18,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:33:18,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:33:18,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:33:18,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:33:18,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:33:18,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:18,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:33:18,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:33:18,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:33:18,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:33:18,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:33:18,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:33:18,057 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 [2019-10-15 01:33:18,345 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:33:18,358 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:33:18,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:33:18,363 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:33:18,364 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:33:18,364 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-15 01:33:18,426 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7dfaca18/71fe95c59bad4166b69008f1c7006c3b/FLAGc93f6f084 [2019-10-15 01:33:18,889 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:33:18,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-15 01:33:18,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7dfaca18/71fe95c59bad4166b69008f1c7006c3b/FLAGc93f6f084 [2019-10-15 01:33:19,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7dfaca18/71fe95c59bad4166b69008f1c7006c3b [2019-10-15 01:33:19,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:33:19,277 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:33:19,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:19,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:33:19,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:33:19,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f39b728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19, skipping insertion in model container [2019-10-15 01:33:19,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,296 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:33:19,316 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:33:19,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:19,533 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:33:19,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:33:19,579 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:33:19,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19 WrapperNode [2019-10-15 01:33:19,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:33:19,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:33:19,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:33:19,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:33:19,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... [2019-10-15 01:33:19,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:33:19,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:33:19,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:33:19,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:33:19,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:33:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:33:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:33:19,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:33:19,785 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:33:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:33:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:33:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:33:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:33:19,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:33:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:33:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:33:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:33:19,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:33:20,228 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:33:20,228 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-15 01:33:20,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:20 BoogieIcfgContainer [2019-10-15 01:33:20,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:33:20,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:33:20,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:33:20,234 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:33:20,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:33:19" (1/3) ... [2019-10-15 01:33:20,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2155184b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:20, skipping insertion in model container [2019-10-15 01:33:20,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:33:19" (2/3) ... [2019-10-15 01:33:20,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2155184b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:33:20, skipping insertion in model container [2019-10-15 01:33:20,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:33:20" (3/3) ... [2019-10-15 01:33:20,237 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2019-10-15 01:33:20,246 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:33:20,253 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:33:20,264 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:33:20,292 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:33:20,293 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:33:20,293 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:33:20,293 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:33:20,293 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:33:20,293 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:33:20,294 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:33:20,294 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:33:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-15 01:33:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:33:20,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:20,316 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:20,318 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:20,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1088212985, now seen corresponding path program 1 times [2019-10-15 01:33:20,330 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:20,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958134119] [2019-10-15 01:33:20,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,331 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:20,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:20,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:33:20,496 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958134119] [2019-10-15 01:33:20,498 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:33:20,498 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:33:20,498 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314204325] [2019-10-15 01:33:20,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:33:20,505 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:20,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:33:20,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:20,528 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-10-15 01:33:20,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:20,603 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:33:20,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:33:20,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-15 01:33:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:20,619 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:33:20,620 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:33:20,627 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:33:20,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:33:20,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:33:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:33:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-10-15 01:33:20,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14 [2019-10-15 01:33:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:20,687 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-15 01:33:20,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:33:20,689 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-10-15 01:33:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:33:20,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:20,692 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:20,693 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:20,695 INFO L82 PathProgramCache]: Analyzing trace with hash -280255419, now seen corresponding path program 1 times [2019-10-15 01:33:20,695 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:20,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911421658] [2019-10-15 01:33:20,696 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,696 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:20,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:33:20,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911421658] [2019-10-15 01:33:20,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633648865] [2019-10-15 01:33:20,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:20,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:33:20,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:33:20,976 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:33:21,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042393574] [2019-10-15 01:33:21,062 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:33:21,062 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:21,070 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:21,078 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:21,079 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:21,258 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:22,460 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:33:22,480 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:22,487 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:22,936 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:22,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 11] total 17 [2019-10-15 01:33:22,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131695572] [2019-10-15 01:33:22,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 01:33:22,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 01:33:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-15 01:33:22,941 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 17 states. [2019-10-15 01:33:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:23,792 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2019-10-15 01:33:23,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-15 01:33:23,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-10-15 01:33:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:23,795 INFO L225 Difference]: With dead ends: 58 [2019-10-15 01:33:23,795 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 01:33:23,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:33:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 01:33:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2019-10-15 01:33:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-15 01:33:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2019-10-15 01:33:23,813 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 18 [2019-10-15 01:33:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:23,817 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2019-10-15 01:33:23,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 01:33:23,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2019-10-15 01:33:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-15 01:33:23,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:23,821 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:24,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:24,025 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:24,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:24,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1663969159, now seen corresponding path program 2 times [2019-10-15 01:33:24,026 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:24,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513836189] [2019-10-15 01:33:24,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:24,027 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:24,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:24,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:24,174 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:33:24,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513836189] [2019-10-15 01:33:24,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342896061] [2019-10-15 01:33:24,175 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 [2019-10-15 01:33:24,269 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 01:33:24,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:24,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:33:24,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:33:24,286 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-15 01:33:24,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [818082113] [2019-10-15 01:33:24,348 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:33:24,348 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:24,349 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:24,349 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:24,349 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:24,383 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:25,240 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:33:25,254 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:25,269 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:25,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:25,745 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 11] total 23 [2019-10-15 01:33:25,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729886161] [2019-10-15 01:33:25,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-15 01:33:25,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:25,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-15 01:33:25,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2019-10-15 01:33:25,748 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 23 states. [2019-10-15 01:33:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:26,873 INFO L93 Difference]: Finished difference Result 91 states and 122 transitions. [2019-10-15 01:33:26,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:33:26,875 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-15 01:33:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:26,877 INFO L225 Difference]: With dead ends: 91 [2019-10-15 01:33:26,877 INFO L226 Difference]: Without dead ends: 67 [2019-10-15 01:33:26,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 77 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=310, Invalid=1250, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:33:26,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-15 01:33:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2019-10-15 01:33:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-15 01:33:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-10-15 01:33:26,904 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 30 [2019-10-15 01:33:26,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:26,904 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-10-15 01:33:26,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-15 01:33:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-10-15 01:33:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-15 01:33:26,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:26,910 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:27,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:27,116 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1209641671, now seen corresponding path program 3 times [2019-10-15 01:33:27,117 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:27,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497411552] [2019-10-15 01:33:27,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:27,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:27,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-15 01:33:27,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497411552] [2019-10-15 01:33:27,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446031744] [2019-10-15 01:33:27,309 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 [2019-10-15 01:33:27,395 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:33:27,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:33:27,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 01:33:27,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-15 01:33:27,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-10-15 01:33:27,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [19417400] [2019-10-15 01:33:27,597 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:33:27,597 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:27,598 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:27,598 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:27,598 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:27,619 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:28,206 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:33:28,215 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:28,218 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:28,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:28,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 11] total 35 [2019-10-15 01:33:28,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536033239] [2019-10-15 01:33:28,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-15 01:33:28,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:28,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-15 01:33:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=863, Unknown=0, NotChecked=0, Total=1190 [2019-10-15 01:33:28,928 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 35 states. [2019-10-15 01:33:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:31,123 INFO L93 Difference]: Finished difference Result 157 states and 212 transitions. [2019-10-15 01:33:31,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-15 01:33:31,124 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 54 [2019-10-15 01:33:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:31,126 INFO L225 Difference]: With dead ends: 157 [2019-10-15 01:33:31,126 INFO L226 Difference]: Without dead ends: 115 [2019-10-15 01:33:31,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 143 SyntacticMatches, 22 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=976, Invalid=3056, Unknown=0, NotChecked=0, Total=4032 [2019-10-15 01:33:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-15 01:33:31,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2019-10-15 01:33:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-10-15 01:33:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2019-10-15 01:33:31,147 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 54 [2019-10-15 01:33:31,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:31,148 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2019-10-15 01:33:31,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-15 01:33:31,148 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2019-10-15 01:33:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-15 01:33:31,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:31,150 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:31,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:31,352 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:31,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:31,352 INFO L82 PathProgramCache]: Analyzing trace with hash -2052149575, now seen corresponding path program 4 times [2019-10-15 01:33:31,353 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:31,353 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749698529] [2019-10-15 01:33:31,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,353 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:31,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:31,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-10-15 01:33:31,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749698529] [2019-10-15 01:33:31,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978969480] [2019-10-15 01:33:31,852 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 [2019-10-15 01:33:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:31,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 01:33:31,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:33:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-10-15 01:33:32,010 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:33:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-10-15 01:33:32,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482447546] [2019-10-15 01:33:32,750 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:33:32,750 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:33:32,751 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:33:32,751 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:33:32,751 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:33:32,777 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:33:33,395 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 21 for LOIs [2019-10-15 01:33:33,401 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:33:33,404 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:33:35,233 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 01:33:35,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 11] total 59 [2019-10-15 01:33:35,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937867820] [2019-10-15 01:33:35,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-10-15 01:33:35,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:33:35,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-10-15 01:33:35,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=2219, Unknown=0, NotChecked=0, Total=3422 [2019-10-15 01:33:35,238 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand 59 states. [2019-10-15 01:33:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:33:40,762 INFO L93 Difference]: Finished difference Result 289 states and 392 transitions. [2019-10-15 01:33:40,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-10-15 01:33:40,763 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 102 [2019-10-15 01:33:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:33:40,765 INFO L225 Difference]: With dead ends: 289 [2019-10-15 01:33:40,765 INFO L226 Difference]: Without dead ends: 211 [2019-10-15 01:33:40,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 275 SyntacticMatches, 46 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6013 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3604, Invalid=8828, Unknown=0, NotChecked=0, Total=12432 [2019-10-15 01:33:40,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-10-15 01:33:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 202. [2019-10-15 01:33:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-10-15 01:33:40,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 206 transitions. [2019-10-15 01:33:40,796 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 206 transitions. Word has length 102 [2019-10-15 01:33:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:33:40,797 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 206 transitions. [2019-10-15 01:33:40,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-10-15 01:33:40,797 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 206 transitions. [2019-10-15 01:33:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-15 01:33:40,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:33:40,801 INFO L380 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:33:41,005 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:33:41,006 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:33:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:33:41,006 INFO L82 PathProgramCache]: Analyzing trace with hash -118693447, now seen corresponding path program 5 times [2019-10-15 01:33:41,007 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:33:41,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755447990] [2019-10-15 01:33:41,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:41,008 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:33:41,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:33:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:33:42,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4324 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2019-10-15 01:33:42,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755447990] [2019-10-15 01:33:42,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971940506] [2019-10-15 01:33:42,292 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