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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/nla-digbench/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:05:46,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:05:46,291 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:05:46,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:05:46,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:05:46,304 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:05:46,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:05:46,307 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:05:46,309 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:05:46,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:05:46,313 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:05:46,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 21:05:46,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 21:05:46,316 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 21:05:46,317 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 21:05:46,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 21:05:46,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 21:05:46,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 21:05:46,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 21:05:46,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 21:05:46,331 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 21:05:46,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 21:05:46,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 21:05:46,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 21:05:46,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 21:05:46,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 21:05:46,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 21:05:46,346 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 21:05:46,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 21:05:46,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 21:05:46,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 21:05:46,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 21:05:46,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 21:05:46,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 21:05:46,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 21:05:46,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 21:05:46,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-03 21:05:46,385 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:05:46,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:05:46,387 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:05:46,387 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:05:46,387 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:05:46,388 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:05:46,388 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:05:46,388 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:05:46,388 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:05:46,389 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:05:46,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:05:46,390 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:05:46,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:05:46,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:05:46,391 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:05:46,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:05:46,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:05:46,392 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:05:46,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:05:46,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:05:46,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:05:46,393 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:05:46,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:05:46,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:05:46,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:05:46,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:05:46,394 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:05:46,394 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:05:46,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:05:46,394 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:05:46,437 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:05:46,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:05:46,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:05:46,453 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:05:46,453 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:05:46,454 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2019-09-03 21:05:46,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc37ee91/0e337ebe88fa46898d80c5ecfe2c36d3/FLAG8e5bb0358 [2019-09-03 21:05:46,895 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:05:46,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu.c [2019-09-03 21:05:46,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc37ee91/0e337ebe88fa46898d80c5ecfe2c36d3/FLAG8e5bb0358 [2019-09-03 21:05:47,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bbc37ee91/0e337ebe88fa46898d80c5ecfe2c36d3 [2019-09-03 21:05:47,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:05:47,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:05:47,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:05:47,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:05:47,266 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:05:47,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,270 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55725c05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47, skipping insertion in model container [2019-09-03 21:05:47,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,277 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:05:47,298 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:05:47,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:05:47,573 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:05:47,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:05:47,757 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:05:47,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47 WrapperNode [2019-09-03 21:05:47,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:05:47,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:05:47,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:05:47,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:05:47,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (1/1) ... [2019-09-03 21:05:47,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:05:47,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:05:47,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:05:47,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:05:47,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (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 [2019-09-03 21:05:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:05:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:05:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:05:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:05:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:05:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 21:05:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:05:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:05:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:05:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:05:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:05:48,033 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:05:48,033 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:05:48,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:05:48 BoogieIcfgContainer [2019-09-03 21:05:48,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:05:48,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:05:48,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:05:48,039 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:05:48,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:05:47" (1/3) ... [2019-09-03 21:05:48,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6fc986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:05:48, skipping insertion in model container [2019-09-03 21:05:48,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:05:47" (2/3) ... [2019-09-03 21:05:48,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6fc986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:05:48, skipping insertion in model container [2019-09-03 21:05:48,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:05:48" (3/3) ... [2019-09-03 21:05:48,042 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2019-09-03 21:05:48,051 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:05:48,058 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:05:48,073 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:05:48,102 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:05:48,102 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:05:48,103 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:05:48,103 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:05:48,103 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:05:48,103 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:05:48,103 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:05:48,103 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:05:48,115 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-03 21:05:48,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:05:48,123 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:05:48,123 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:05:48,125 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:05:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash 2145967090, now seen corresponding path program 1 times [2019-09-03 21:05:48,132 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:05:48,175 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:48,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:48,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:48,176 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:05:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:05:48,229 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:05:48,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:05:48,230 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:05:48,234 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:05:48,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:05:48,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:05:48,249 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-03 21:05:48,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:05:48,266 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2019-09-03 21:05:48,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:05:48,268 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:05:48,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:05:48,277 INFO L225 Difference]: With dead ends: 29 [2019-09-03 21:05:48,277 INFO L226 Difference]: Without dead ends: 24 [2019-09-03 21:05:48,279 INFO L628 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 [2019-09-03 21:05:48,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-03 21:05:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-03 21:05:48,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 21:05:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2019-09-03 21:05:48,320 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2019-09-03 21:05:48,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:05:48,320 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2019-09-03 21:05:48,321 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:05:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2019-09-03 21:05:48,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:05:48,321 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:05:48,322 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:05:48,322 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:05:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash 2134586928, now seen corresponding path program 1 times [2019-09-03 21:05:48,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:05:48,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:48,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:48,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:48,324 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:05:48,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:05:48,464 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:05:48,464 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 21:05:48,465 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:05:48,466 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:05:48,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:05:48,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 21:05:48,467 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2019-09-03 21:05:48,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:05:48,623 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2019-09-03 21:05:48,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:05:48,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:05:48,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:05:48,625 INFO L225 Difference]: With dead ends: 28 [2019-09-03 21:05:48,625 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 21:05:48,626 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 21:05:48,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 21:05:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-03 21:05:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-03 21:05:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2019-09-03 21:05:48,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2019-09-03 21:05:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:05:48,639 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2019-09-03 21:05:48,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:05:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2019-09-03 21:05:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-03 21:05:48,640 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:05:48,640 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:05:48,641 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:05:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:48,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1496147284, now seen corresponding path program 1 times [2019-09-03 21:05:48,641 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:05:48,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:48,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:48,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:48,643 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:05:48,651 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:05:48,652 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:05:48,652 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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 [2019-09-03 21:05:48,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:48,683 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:05:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:48,702 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-03 21:05:48,704 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [35], [38], [40], [43], [45], [46], [47], [48], [50], [51], [52] [2019-09-03 21:05:48,742 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:05:48,743 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:05:48,849 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:05:48,851 INFO L272 AbstractInterpreter]: Visited 14 different actions 19 times. Never merged. Never widened. Performed 18 root evaluator evaluations with a maximum evaluation depth of 8. Performed 18 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Never found a fixpoint. Largest state had 6 variables. [2019-09-03 21:05:48,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:48,855 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:05:48,855 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:05:48,855 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:05:48,880 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:48,880 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:05:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:48,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 21:05:48,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:05:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:05:48,997 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:05:49,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:05:49,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:05:49,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:05:49,159 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:05:49,159 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-09-03 21:05:49,159 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:05:49,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 21:05:49,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 21:05:49,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-09-03 21:05:49,161 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 12 states. [2019-09-03 21:05:49,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:05:49,634 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2019-09-03 21:05:49,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 21:05:49,634 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2019-09-03 21:05:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:05:49,638 INFO L225 Difference]: With dead ends: 51 [2019-09-03 21:05:49,638 INFO L226 Difference]: Without dead ends: 51 [2019-09-03 21:05:49,638 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-09-03 21:05:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-03 21:05:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-09-03 21:05:49,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 21:05:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2019-09-03 21:05:49,650 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 15 [2019-09-03 21:05:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:05:49,650 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2019-09-03 21:05:49,650 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 21:05:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2019-09-03 21:05:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-03 21:05:49,651 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:05:49,651 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:05:49,652 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:05:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:49,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1472996464, now seen corresponding path program 1 times [2019-09-03 21:05:49,652 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:05:49,653 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:49,653 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:49,654 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:49,654 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:05:49,660 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:05:49,660 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:05:49,660 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG 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) [2019-09-03 21:05:49,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:49,684 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:05:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:49,694 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2019-09-03 21:05:49,694 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [35], [38], [40], [43], [45], [46], [47], [48], [50], [51], [52], [53], [54] [2019-09-03 21:05:49,696 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:05:49,696 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:05:49,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:05:49,746 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-09-03 21:05:49,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:49,746 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:05:49,746 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:05:49,746 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:05:49,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:49,768 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:05:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:49,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-03 21:05:49,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:05:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 21:05:49,858 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:05:49,914 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:05:49,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:05:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-03 21:05:49,980 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:05:49,981 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-09-03 21:05:49,981 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:05:49,982 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 21:05:49,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 21:05:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-09-03 21:05:49,983 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 12 states. [2019-09-03 21:05:52,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:05:52,295 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2019-09-03 21:05:52,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 21:05:52,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-09-03 21:05:52,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:05:52,299 INFO L225 Difference]: With dead ends: 53 [2019-09-03 21:05:52,299 INFO L226 Difference]: Without dead ends: 53 [2019-09-03 21:05:52,300 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-09-03 21:05:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-03 21:05:52,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-09-03 21:05:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-03 21:05:52,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2019-09-03 21:05:52,317 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2019-09-03 21:05:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:05:52,318 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2019-09-03 21:05:52,318 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 21:05:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2019-09-03 21:05:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 21:05:52,319 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:05:52,319 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:05:52,319 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:05:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:52,319 INFO L82 PathProgramCache]: Analyzing trace with hash -378433900, now seen corresponding path program 1 times [2019-09-03 21:05:52,319 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:05:52,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:52,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:52,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:05:52,321 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:05:52,326 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:05:52,326 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:05:52,326 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:05:52,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:52,341 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:05:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:52,351 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2019-09-03 21:05:52,351 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [35], [38], [40], [43], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56] [2019-09-03 21:05:52,353 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:05:52,353 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:05:52,387 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:05:52,387 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-09-03 21:05:52,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:05:52,388 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:05:52,388 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:05:52,388 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 21:05:52,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:05:52,405 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:05:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:05:52,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 21:05:52,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:05:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 21:05:52,486 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:05:52,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:05:52,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:05:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 21:05:52,604 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:05:52,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2019-09-03 21:05:52,604 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:05:52,605 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 21:05:52,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 21:05:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-09-03 21:05:52,606 INFO L87 Difference]: Start difference. First operand 52 states and 69 transitions. Second operand 12 states. [2019-09-03 21:06:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:06:00,738 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2019-09-03 21:06:00,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 21:06:00,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2019-09-03 21:06:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:06:00,740 INFO L225 Difference]: With dead ends: 66 [2019-09-03 21:06:00,741 INFO L226 Difference]: Without dead ends: 59 [2019-09-03 21:06:00,741 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-09-03 21:06:00,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-03 21:06:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-03 21:06:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 21:06:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2019-09-03 21:06:00,756 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 25 [2019-09-03 21:06:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:06:00,756 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2019-09-03 21:06:00,756 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 21:06:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2019-09-03 21:06:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-03 21:06:00,760 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:06:00,760 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:06:00,761 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:06:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:06:00,761 INFO L82 PathProgramCache]: Analyzing trace with hash -223920524, now seen corresponding path program 1 times [2019-09-03 21:06:00,761 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:06:00,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:00,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:00,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:00,762 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:06:00,768 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:06:00,768 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:06:00,768 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:06:00,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:00,782 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:06:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:06:00,805 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 48 with the following transitions: [2019-09-03 21:06:00,806 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [23], [35], [38], [40], [43], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59] [2019-09-03 21:06:00,808 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:06:00,808 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:06:00,834 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:06:00,835 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-09-03 21:06:00,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:06:00,835 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:06:00,835 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:06:00,835 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:06:00,856 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:00,856 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:06:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:06:00,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 21:06:00,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:06:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-03 21:06:00,985 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:06:01,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:01,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-09-03 21:06:01,116 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:06:01,116 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-03 21:06:01,116 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:06:01,117 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 21:06:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 21:06:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-09-03 21:06:01,118 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 14 states. [2019-09-03 21:06:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:06:01,581 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2019-09-03 21:06:01,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 21:06:01,582 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2019-09-03 21:06:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:06:01,584 INFO L225 Difference]: With dead ends: 74 [2019-09-03 21:06:01,584 INFO L226 Difference]: Without dead ends: 74 [2019-09-03 21:06:01,585 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-03 21:06:01,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-09-03 21:06:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-09-03 21:06:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-03 21:06:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2019-09-03 21:06:01,594 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 47 [2019-09-03 21:06:01,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:06:01,594 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2019-09-03 21:06:01,595 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 21:06:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2019-09-03 21:06:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-09-03 21:06:01,596 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:06:01,596 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:06:01,597 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:06:01,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:06:01,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1224693684, now seen corresponding path program 2 times [2019-09-03 21:06:01,597 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:06:01,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:01,598 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:01,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:01,599 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:06:01,605 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:06:01,605 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:06:01,605 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:06:01,625 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 21:06:01,626 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:06:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:06:01,641 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 21:06:01,641 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:06:01,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:06:01,641 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:06:01,652 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 21:06:01,652 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-03 21:06:01,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 21:06:01,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 21:06:01,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 21:06:01,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:06:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-09-03 21:06:01,725 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:06:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2019-09-03 21:06:01,914 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 21:06:01,915 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-09-03 21:06:01,915 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:06:01,917 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:06:01,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:06:01,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:06:01,918 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 5 states. [2019-09-03 21:06:04,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:06:04,018 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2019-09-03 21:06:04,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 21:06:04,019 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-09-03 21:06:04,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:06:04,020 INFO L225 Difference]: With dead ends: 81 [2019-09-03 21:06:04,020 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 21:06:04,021 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 21:06:04,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 21:06:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-09-03 21:06:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-03 21:06:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2019-09-03 21:06:04,030 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 57 [2019-09-03 21:06:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:06:04,030 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2019-09-03 21:06:04,030 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:06:04,030 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2019-09-03 21:06:04,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-03 21:06:04,032 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:06:04,032 INFO L399 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:06:04,032 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:06:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:06:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1975458643, now seen corresponding path program 1 times [2019-09-03 21:06:04,033 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:06:04,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:04,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 21:06:04,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:04,034 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:06:04,040 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:06:04,040 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:06:04,040 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:06:04,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:04,059 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:06:04,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:06:04,074 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 69 with the following transitions: [2019-09-03 21:06:04,074 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [21], [23], [35], [38], [40], [43], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62] [2019-09-03 21:06:04,076 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:06:04,076 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:06:04,091 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:06:04,092 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-09-03 21:06:04,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:06:04,092 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:06:04,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:06:04,092 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:06:04,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:04,112 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:06:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:06:04,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-03 21:06:04,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:06:04,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:04,225 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-03 21:06:04,225 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:06:04,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:04,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-09-03 21:06:04,511 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:06:04,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-03 21:06:04,512 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:06:04,512 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-03 21:06:04,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-03 21:06:04,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-09-03 21:06:04,513 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand 14 states. [2019-09-03 21:06:11,292 WARN L188 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 33 [2019-09-03 21:06:42,002 WARN L188 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 31 [2019-09-03 21:06:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:06:47,278 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2019-09-03 21:06:47,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 21:06:47,278 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2019-09-03 21:06:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:06:47,280 INFO L225 Difference]: With dead ends: 83 [2019-09-03 21:06:47,280 INFO L226 Difference]: Without dead ends: 83 [2019-09-03 21:06:47,281 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=80, Invalid=299, Unknown=1, NotChecked=0, Total=380 [2019-09-03 21:06:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-09-03 21:06:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2019-09-03 21:06:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-03 21:06:47,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2019-09-03 21:06:47,290 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 68 [2019-09-03 21:06:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:06:47,290 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2019-09-03 21:06:47,290 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-03 21:06:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2019-09-03 21:06:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 21:06:47,292 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:06:47,292 INFO L399 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:06:47,292 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:06:47,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:06:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash 713083767, now seen corresponding path program 1 times [2019-09-03 21:06:47,293 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:06:47,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:47,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:47,294 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:06:47,294 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:06:47,299 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:06:47,299 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:06:47,299 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:06:47,333 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:47,333 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:06:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:06:47,350 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 74 with the following transitions: [2019-09-03 21:06:47,350 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [21], [23], [35], [38], [40], [43], [45], [46], [47], [48], [50], [51], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62], [63], [64] [2019-09-03 21:06:47,352 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:06:47,352 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:06:47,365 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:06:47,366 INFO L272 AbstractInterpreter]: Visited 15 different actions 20 times. Never merged. Never widened. Performed 19 root evaluator evaluations with a maximum evaluation depth of 9. Performed 19 inverse root evaluator evaluations with a maximum inverse evaluation depth of 9. Never found a fixpoint. Largest state had 6 variables. [2019-09-03 21:06:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:06:47,366 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:06:47,366 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:06:47,366 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:06:47,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:06:47,388 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:06:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:06:47,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-03 21:06:47,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:06:47,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:47,529 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-03 21:06:47,529 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:06:47,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:47,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:06:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-09-03 21:06:47,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:06:47,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-09-03 21:06:47,796 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:06:47,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 21:06:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 21:06:47,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-09-03 21:06:47,798 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 15 states. [2019-09-03 21:07:01,119 WARN L188 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 37 [2019-09-03 21:07:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:07:09,042 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2019-09-03 21:07:09,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-03 21:07:09,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2019-09-03 21:07:09,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:07:09,044 INFO L225 Difference]: With dead ends: 107 [2019-09-03 21:07:09,044 INFO L226 Difference]: Without dead ends: 96 [2019-09-03 21:07:09,045 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-09-03 21:07:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-03 21:07:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2019-09-03 21:07:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-03 21:07:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2019-09-03 21:07:09,053 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 73 [2019-09-03 21:07:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:07:09,054 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2019-09-03 21:07:09,054 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 21:07:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2019-09-03 21:07:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 21:07:09,055 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:07:09,056 INFO L399 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:07:09,056 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:07:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:07:09,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1818484460, now seen corresponding path program 3 times [2019-09-03 21:07:09,056 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:07:09,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:07:09,057 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:07:09,057 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:07:09,058 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:07:09,062 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:07:09,062 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:07:09,063 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:07:09,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 21:07:09,075 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:07:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:07:09,088 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 21:07:09,089 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:07:09,089 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:07:09,089 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 21:07:09,102 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 21:07:09,102 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-03 21:07:09,141 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 21:07:09,141 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 21:07:09,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 21:07:09,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:07:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 25 proven. 54 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-03 21:07:09,250 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:07:13,332 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:07:13,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:07:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 25 proven. 54 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-09-03 21:07:13,426 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:07:13,426 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-09-03 21:07:13,426 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:07:13,429 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 21:07:13,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 21:07:13,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=187, Unknown=1, NotChecked=0, Total=240 [2019-09-03 21:07:13,430 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 16 states. [2019-09-03 21:07:15,388 WARN L188 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2019-09-03 21:07:19,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:07:19,896 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2019-09-03 21:07:19,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 21:07:19,897 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2019-09-03 21:07:19,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:07:19,897 INFO L225 Difference]: With dead ends: 101 [2019-09-03 21:07:19,897 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 21:07:19,898 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=77, Invalid=264, Unknown=1, NotChecked=0, Total=342 [2019-09-03 21:07:19,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 21:07:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 21:07:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 21:07:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 21:07:19,899 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2019-09-03 21:07:19,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:07:19,900 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 21:07:19,900 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 21:07:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 21:07:19,900 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 21:07:19,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 09:07:19 BoogieIcfgContainer [2019-09-03 21:07:19,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 21:07:19,906 INFO L168 Benchmark]: Toolchain (without parser) took 92643.92 ms. Allocated memory was 132.1 MB in the beginning and 347.1 MB in the end (delta: 215.0 MB). Free memory was 84.2 MB in the beginning and 314.3 MB in the end (delta: -230.1 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-03 21:07:19,908 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 132.1 MB. Free memory was 102.3 MB in the beginning and 102.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:07:19,909 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.29 ms. Allocated memory was 132.1 MB in the beginning and 197.7 MB in the end (delta: 65.5 MB). Free memory was 84.0 MB in the beginning and 175.8 MB in the end (delta: -91.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2019-09-03 21:07:19,909 INFO L168 Benchmark]: Boogie Preprocessor took 30.59 ms. Allocated memory is still 197.7 MB. Free memory was 175.8 MB in the beginning and 173.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-09-03 21:07:19,911 INFO L168 Benchmark]: RCFGBuilder took 244.49 ms. Allocated memory is still 197.7 MB. Free memory was 173.9 MB in the beginning and 161.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2019-09-03 21:07:19,912 INFO L168 Benchmark]: TraceAbstraction took 91869.06 ms. Allocated memory was 197.7 MB in the beginning and 347.1 MB in the end (delta: 149.4 MB). Free memory was 161.0 MB in the beginning and 314.3 MB in the end (delta: -153.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2019-09-03 21:07:19,916 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 132.1 MB. Free memory was 102.3 MB in the beginning and 102.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 496.29 ms. Allocated memory was 132.1 MB in the beginning and 197.7 MB in the end (delta: 65.5 MB). Free memory was 84.0 MB in the beginning and 175.8 MB in the end (delta: -91.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.59 ms. Allocated memory is still 197.7 MB. Free memory was 175.8 MB in the beginning and 173.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.49 ms. Allocated memory is still 197.7 MB. Free memory was 173.9 MB in the beginning and 161.0 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 91869.06 ms. Allocated memory was 197.7 MB in the beginning and 347.1 MB in the end (delta: 149.4 MB). Free memory was 161.0 MB in the beginning and 314.3 MB in the end (delta: -153.3 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. SAFE Result, 91.8s OverallTime, 10 OverallIterations, 14 TraceHistogramMax, 84.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 254 SDtfs, 168 SDslu, 930 SDs, 0 SdLazy, 1508 SolverSat, 291 SolverUnsat, 50 SolverUnknown, 0 SolverNotchecked, 70.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 797 GetRequests, 673 SyntacticMatches, 4 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 18.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 788 NumberOfCodeBlocks, 753 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 770 ConstructedInterpolants, 12 QuantifiedInterpolants, 243954 SizeOfPredicates, 32 NumberOfNonLiveVariables, 777 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 2054/2394 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...