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/nla-digbench/prodbin.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:04:37,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:04:37,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:04:37,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:04:37,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:04:37,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:04:37,275 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:04:37,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:04:37,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:04:37,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:04:37,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:04:37,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:04:37,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:04:37,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:04:37,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:04:37,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:04:37,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:04:37,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:04:37,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:04:37,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:04:37,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:04:37,318 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:04:37,321 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:04:37,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:04:37,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:04:37,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:04:37,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:04:37,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:04:37,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:04:37,328 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:04:37,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:04:37,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:04:37,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:04:37,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:04:37,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:04:37,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:04:37,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:04:37,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:04:37,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:04:37,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:04:37,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:04:37,337 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 03:04:37,369 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:04:37,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:04:37,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:04:37,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:04:37,374 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:04:37,378 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:04:37,378 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:04:37,378 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:04:37,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:04:37,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:04:37,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:04:37,379 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:04:37,379 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:04:37,379 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:04:37,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:04:37,379 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:04:37,380 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:04:37,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:04:37,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:04:37,381 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:04:37,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:04:37,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:37,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:04:37,382 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:04:37,382 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:04:37,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:04:37,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:04:37,383 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:04:37,383 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 03:04:37,690 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:04:37,711 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:04:37,715 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:04:37,717 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:04:37,717 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:04:37,718 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin.c [2019-10-15 03:04:37,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadf886a9/bd9f8919b9bb41288f55ad8c372a2a1a/FLAGc8e6ee7af [2019-10-15 03:04:38,269 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:04:38,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin.c [2019-10-15 03:04:38,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadf886a9/bd9f8919b9bb41288f55ad8c372a2a1a/FLAGc8e6ee7af [2019-10-15 03:04:38,628 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadf886a9/bd9f8919b9bb41288f55ad8c372a2a1a [2019-10-15 03:04:38,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:04:38,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:04:38,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:38,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:04:38,646 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:04:38,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:38,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@283ca1de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38, skipping insertion in model container [2019-10-15 03:04:38,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:38,658 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:04:38,679 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:04:38,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:38,885 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:04:38,902 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:38,917 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:04:38,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38 WrapperNode [2019-10-15 03:04:38,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:38,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:04:38,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:04:38,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:04:39,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:39,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:39,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:39,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:39,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:39,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:39,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (1/1) ... [2019-10-15 03:04:39,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:04:39,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:04:39,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:04:39,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:04:39,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (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 03:04:39,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:04:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:04:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:04:39,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:04:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:04:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-10-15 03:04:39,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:04:39,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:04:39,107 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:04:39,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:04:39,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:04:39,375 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:04:39,375 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:04:39,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:39 BoogieIcfgContainer [2019-10-15 03:04:39,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:04:39,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:04:39,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:04:39,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:04:39,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:04:38" (1/3) ... [2019-10-15 03:04:39,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20528b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:39, skipping insertion in model container [2019-10-15 03:04:39,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:38" (2/3) ... [2019-10-15 03:04:39,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20528b6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:39, skipping insertion in model container [2019-10-15 03:04:39,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:39" (3/3) ... [2019-10-15 03:04:39,385 INFO L109 eAbstractionObserver]: Analyzing ICFG prodbin.c [2019-10-15 03:04:39,394 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:04:39,402 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:04:39,413 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:04:39,437 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:04:39,438 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:04:39,438 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:04:39,438 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:04:39,438 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:04:39,440 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:04:39,440 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:04:39,440 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:04:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 03:04:39,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:39,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:39,466 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:39,467 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:39,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1598892056, now seen corresponding path program 1 times [2019-10-15 03:04:39,485 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:39,485 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971950476] [2019-10-15 03:04:39,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:39,595 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 03:04:39,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971950476] [2019-10-15 03:04:39,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:39,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:04:39,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972841650] [2019-10-15 03:04:39,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:04:39,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:04:39,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:39,616 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-15 03:04:39,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:39,645 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-15 03:04:39,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:04:39,646 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 03:04:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:39,655 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:04:39,655 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:04:39,658 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:39,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:04:39,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:04:39,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:04:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-15 03:04:39,700 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-10-15 03:04:39,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:39,701 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-15 03:04:39,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:04:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-15 03:04:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:39,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:39,703 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:39,703 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:39,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-10-15 03:04:39,704 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:39,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588061430] [2019-10-15 03:04:39,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,705 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:39,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:39,714 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:39,714 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525038258] [2019-10-15 03:04:39,714 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 03:04:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:39,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:04:39,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:39,949 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2019-10-15 03:04:40,020 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 03:04:40,021 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:40,102 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 03:04:40,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588061430] [2019-10-15 03:04:40,103 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:40,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525038258] [2019-10-15 03:04:40,104 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:40,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 03:04:40,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339427577] [2019-10-15 03:04:40,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:04:40,106 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:04:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:04:40,107 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-10-15 03:04:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:40,254 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-10-15 03:04:40,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:04:40,255 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-15 03:04:40,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:40,257 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:04:40,257 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 03:04:40,258 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 03:04:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-15 03:04:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-15 03:04:40,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-15 03:04:40,280 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-10-15 03:04:40,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:40,281 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-15 03:04:40,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:04:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-15 03:04:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 03:04:40,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:40,288 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:40,489 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:40,489 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash -148694472, now seen corresponding path program 1 times [2019-10-15 03:04:40,491 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:40,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301160004] [2019-10-15 03:04:40,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:40,492 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:40,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:40,506 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:40,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788425162] [2019-10-15 03:04:40,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:40,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:04:40,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:04:40,735 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:40,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:40,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 03:04:40,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301160004] [2019-10-15 03:04:40,904 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:40,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788425162] [2019-10-15 03:04:40,905 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670215938] [2019-10-15 03:04:40,941 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 03:04:40,941 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:40,948 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:40,963 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:40,964 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:41,036 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:04:41,539 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2019-10-15 03:04:41,634 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:04:41,638 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:41,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:04:41,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2019-10-15 03:04:41,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975163448] [2019-10-15 03:04:41,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-15 03:04:41,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-15 03:04:41,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:04:41,868 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 19 states. [2019-10-15 03:04:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:42,073 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2019-10-15 03:04:42,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 03:04:42,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2019-10-15 03:04:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:42,078 INFO L225 Difference]: With dead ends: 30 [2019-10-15 03:04:42,079 INFO L226 Difference]: Without dead ends: 25 [2019-10-15 03:04:42,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2019-10-15 03:04:42,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-15 03:04:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-10-15 03:04:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-15 03:04:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-10-15 03:04:42,095 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 23 [2019-10-15 03:04:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:42,096 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-10-15 03:04:42,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-15 03:04:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-10-15 03:04:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:04:42,097 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:42,098 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:42,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:42,299 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:42,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:42,299 INFO L82 PathProgramCache]: Analyzing trace with hash 768249234, now seen corresponding path program 1 times [2019-10-15 03:04:42,300 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:42,300 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582487781] [2019-10-15 03:04:42,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:42,300 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:42,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:42,313 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:42,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205059219] [2019-10-15 03:04:42,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:42,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-15 03:04:42,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:58,103 WARN L191 SmtUtils]: Spent 15.64 s on a formula simplification. DAG size of input: 141 DAG size of output: 23 [2019-10-15 03:05:16,076 WARN L191 SmtUtils]: Spent 17.59 s on a formula simplification. DAG size of input: 224 DAG size of output: 71 [2019-10-15 03:05:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:05:20,298 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:05:24,632 WARN L191 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 38 [2019-10-15 03:05:25,548 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2019-10-15 03:05:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 03:05:25,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582487781] [2019-10-15 03:05:25,688 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:05:25,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205059219] [2019-10-15 03:05:25,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2083855357] [2019-10-15 03:05:25,690 INFO L162 IcfgInterpreter]: Started Sifa with 14 locations of interest [2019-10-15 03:05:25,690 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:05:25,691 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:05:25,691 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:05:25,691 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:05:25,715 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:05:25,915 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:05:25,988 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:05:25,996 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:05:26,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:05:26,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 20 [2019-10-15 03:05:26,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427969775] [2019-10-15 03:05:26,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-15 03:05:26,316 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:05:26,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-15 03:05:26,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=308, Unknown=1, NotChecked=0, Total=380 [2019-10-15 03:05:26,317 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 20 states.