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/prodbin.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:25:26,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:25:26,251 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:25:26,267 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 02:25:26,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 02:25:26,269 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 02:25:26,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 02:25:26,281 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 02:25:26,282 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 02:25:26,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 02:25:26,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 02:25:26,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 02:25:26,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 02:25:26,291 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 02:25:26,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 02:25:26,295 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 02:25:26,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 02:25:26,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 02:25:26,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 02:25:26,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 02:25:26,304 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 02:25:26,306 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 02:25:26,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 02:25:26,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 02:25:26,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-10 02:25:26,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 02:25:26,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 02:25:26,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 02:25:26,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 02:25:26,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 02:25:26,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 02:25:26,319 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 02:25:26,319 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 02:25:26,319 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 02:25:26,320 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 02:25:26,320 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 02:25:26,321 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 [2019-09-10 02:25:26,336 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:25:26,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:25:26,336 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:25:26,336 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:25:26,337 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:25:26,337 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:25:26,337 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:25:26,338 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:25:26,338 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:25:26,338 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:25:26,339 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:25:26,339 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:25:26,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:25:26,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:25:26,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:25:26,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:25:26,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:25:26,340 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:25:26,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:25:26,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:25:26,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:25:26,341 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:25:26,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:25:26,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:25:26,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:25:26,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:25:26,342 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:25:26,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:25:26,342 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:25:26,342 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:25:26,379 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:25:26,393 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:25:26,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:25:26,400 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:25:26,402 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:25:26,403 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/prodbin.c [2019-09-10 02:25:26,472 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64cd4aa57/a0d36c7afcc04264900e939cd38142de/FLAG95338bd22 [2019-09-10 02:25:26,887 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:25:26,888 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/prodbin.c [2019-09-10 02:25:26,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64cd4aa57/a0d36c7afcc04264900e939cd38142de/FLAG95338bd22 [2019-09-10 02:25:27,285 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64cd4aa57/a0d36c7afcc04264900e939cd38142de [2019-09-10 02:25:27,297 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:25:27,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:25:27,299 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:25:27,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:25:27,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:25:27,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163020e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27, skipping insertion in model container [2019-09-10 02:25:27,306 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,314 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:25:27,332 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:25:27,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:25:27,555 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:25:27,580 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:25:27,596 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:25:27,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27 WrapperNode [2019-09-10 02:25:27,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:25:27,597 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:25:27,597 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:25:27,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:25:27,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,699 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (1/1) ... [2019-09-10 02:25:27,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:25:27,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:25:27,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:25:27,721 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:25:27,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (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 [2019-09-10 02:25:27,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:25:27,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:25:27,777 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 02:25:27,778 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:25:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:25:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-09-10 02:25:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:25:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:25:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:25:27,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:25:27,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:25:27,952 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:25:27,952 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 02:25:27,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:25:27 BoogieIcfgContainer [2019-09-10 02:25:27,954 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:25:27,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:25:27,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:25:27,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:25:27,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:25:27" (1/3) ... [2019-09-10 02:25:27,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b85872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:25:27, skipping insertion in model container [2019-09-10 02:25:27,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:25:27" (2/3) ... [2019-09-10 02:25:27,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b85872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:25:27, skipping insertion in model container [2019-09-10 02:25:27,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:25:27" (3/3) ... [2019-09-10 02:25:27,975 INFO L109 eAbstractionObserver]: Analyzing ICFG prodbin.c [2019-09-10 02:25:28,000 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:25:28,009 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:25:28,027 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:25:28,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:25:28,070 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:25:28,070 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:25:28,071 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:25:28,071 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:25:28,071 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:25:28,071 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:25:28,071 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:25:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-10 02:25:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 02:25:28,110 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:25:28,110 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:25:28,112 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:25:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:28,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1560104174, now seen corresponding path program 1 times [2019-09-10 02:25:28,118 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:25:28,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:28,155 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:28,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:28,155 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:25:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:25:28,220 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:25:28,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 02:25:28,220 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:25:28,224 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 02:25:28,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 02:25:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:25:28,236 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-10 02:25:28,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:25:28,256 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2019-09-10 02:25:28,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 02:25:28,258 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-10 02:25:28,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:25:28,270 INFO L225 Difference]: With dead ends: 22 [2019-09-10 02:25:28,270 INFO L226 Difference]: Without dead ends: 17 [2019-09-10 02:25:28,274 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 [2019-09-10 02:25:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-10 02:25:28,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-10 02:25:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-10 02:25:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-09-10 02:25:28,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2019-09-10 02:25:28,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:25:28,326 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-09-10 02:25:28,326 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 02:25:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-09-10 02:25:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 02:25:28,329 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:25:28,329 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:25:28,330 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:25:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:28,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1561891634, now seen corresponding path program 1 times [2019-09-10 02:25:28,332 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:25:28,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:28,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:28,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:28,334 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:25:28,360 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:25:28,360 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:25:28,360 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 [2019-09-10 02:25:28,380 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:28,381 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:25:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:28,402 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 02:25:28,403 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:25:28,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:25:28,403 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) [2019-09-10 02:25:28,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:28,421 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:25:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:28,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-10 02:25:28,458 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:25:29,812 WARN L188 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 16 [2019-09-10 02:25:29,826 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:25:29,873 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:25:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:25:29,930 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:25:29,930 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-10 02:25:29,931 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:25:29,931 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:25:29,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:25:29,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-10 02:25:29,932 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2019-09-10 02:25:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:25:30,024 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2019-09-10 02:25:30,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:25:30,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-10 02:25:30,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:25:30,027 INFO L225 Difference]: With dead ends: 26 [2019-09-10 02:25:30,027 INFO L226 Difference]: Without dead ends: 26 [2019-09-10 02:25:30,028 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:25:30,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-10 02:25:30,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-10 02:25:30,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-10 02:25:30,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-10 02:25:30,035 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2019-09-10 02:25:30,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:25:30,035 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-10 02:25:30,035 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:25:30,035 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-10 02:25:30,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-10 02:25:30,036 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:25:30,037 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:25:30,037 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:25:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1038075816, now seen corresponding path program 1 times [2019-09-10 02:25:30,038 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:25:30,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:30,039 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:30,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:30,040 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:25:30,045 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:25:30,046 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:25:30,046 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:25:30,059 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:30,060 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:25:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:30,072 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-10 02:25:30,074 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [22], [26], [33], [36], [38], [41], [43], [44], [45], [46], [48], [49] [2019-09-10 02:25:30,108 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:25:30,108 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:25:30,240 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 02:25:30,295 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:25:30,300 INFO L272 AbstractInterpreter]: Visited 16 different actions 26 times. Merged at 4 different actions 4 times. Never widened. Performed 44 root evaluator evaluations with a maximum evaluation depth of 8. Performed 44 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2019-09-10 02:25:30,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:30,303 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:25:30,303 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:25:30,303 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:25:30,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:30,319 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:25:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:30,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-10 02:25:30,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:25:31,586 WARN L188 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 16 [2019-09-10 02:25:37,097 WARN L188 SmtUtils]: Spent 5.48 s on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2019-09-10 02:25:41,977 WARN L188 SmtUtils]: Spent 4.86 s on a formula simplification. DAG size of input: 33 DAG size of output: 22 [2019-09-10 02:25:41,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:25:42,072 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:25:42,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:25:44,942 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 02:25:44,942 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2019-09-10 02:25:44,942 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:25:44,943 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 02:25:44,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 02:25:44,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-10 02:25:44,944 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2019-09-10 02:25:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:25:45,142 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2019-09-10 02:25:45,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 02:25:45,143 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-09-10 02:25:45,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:25:45,144 INFO L225 Difference]: With dead ends: 35 [2019-09-10 02:25:45,144 INFO L226 Difference]: Without dead ends: 35 [2019-09-10 02:25:45,145 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-10 02:25:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-10 02:25:45,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-09-10 02:25:45,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-10 02:25:45,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-10 02:25:45,153 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 19 [2019-09-10 02:25:45,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:25:45,154 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-10 02:25:45,154 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 02:25:45,154 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-10 02:25:45,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-10 02:25:45,155 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:25:45,155 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:25:45,156 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:25:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:45,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1481884118, now seen corresponding path program 1 times [2019-09-10 02:25:45,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:25:45,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:45,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:45,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:45,157 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:25:45,163 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:25:45,163 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:25:45,163 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 [2019-09-10 02:25:45,180 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:45,180 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:25:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:45,190 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-10 02:25:45,191 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [24], [26], [33], [36], [38], [41], [43], [44], [45], [46], [48], [49] [2019-09-10 02:25:45,197 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:25:45,197 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:25:45,226 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 02:25:45,300 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:25:45,300 INFO L272 AbstractInterpreter]: Visited 16 different actions 16 times. Never merged. Never widened. Performed 23 root evaluator evaluations with a maximum evaluation depth of 10. Performed 23 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2019-09-10 02:25:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:45,301 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:25:45,301 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:25:45,301 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:25:45,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:45,317 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:25:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:45,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-10 02:25:45,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:25:46,656 WARN L188 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 16 [2019-09-10 02:25:50,758 WARN L188 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2019-09-10 02:25:55,474 WARN L188 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2019-09-10 02:25:55,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:25:55,512 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:25:55,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:25:55,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:25:55,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-10 02:25:55,740 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:25:55,740 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-10 02:25:55,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-10 02:25:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-09-10 02:25:55,741 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 12 states. [2019-09-10 02:25:57,714 WARN L188 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2019-09-10 02:25:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:25:57,842 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-09-10 02:25:57,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-10 02:25:57,842 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-09-10 02:25:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:25:57,845 INFO L225 Difference]: With dead ends: 55 [2019-09-10 02:25:57,845 INFO L226 Difference]: Without dead ends: 55 [2019-09-10 02:25:57,845 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2019-09-10 02:25:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-10 02:25:57,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-09-10 02:25:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-10 02:25:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-09-10 02:25:57,855 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 19 [2019-09-10 02:25:57,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:25:57,856 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-09-10 02:25:57,856 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-10 02:25:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-09-10 02:25:57,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-10 02:25:57,858 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:25:57,858 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:25:57,858 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:25:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 776909625, now seen corresponding path program 1 times [2019-09-10 02:25:57,859 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:25:57,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:57,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:57,860 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:57,860 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:25:57,864 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:25:57,864 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:25:57,864 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 [2019-09-10 02:25:57,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:57,875 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:25:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:57,885 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2019-09-10 02:25:57,885 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [22], [26], [33], [36], [38], [41], [43], [44], [45], [46], [48], [49], [50] [2019-09-10 02:25:57,888 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:25:57,888 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:25:57,912 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 02:25:57,946 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:25:57,947 INFO L272 AbstractInterpreter]: Visited 18 different actions 40 times. Merged at 5 different actions 5 times. Never widened. Performed 58 root evaluator evaluations with a maximum evaluation depth of 8. Performed 58 inverse root evaluator evaluations with a maximum inverse evaluation depth of 8. Found 1 fixpoints after 1 different actions. Largest state had 7 variables. [2019-09-10 02:25:57,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:57,948 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:25:57,949 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:25:57,949 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) [2019-09-10 02:25:57,973 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:57,973 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:25:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:57,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-10 02:25:57,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:25:58,056 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-10 02:25:58,077 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:25:58,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:58,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:25:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-10 02:25:58,174 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:25:58,174 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-10 02:25:58,174 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:25:58,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-10 02:25:58,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-10 02:25:58,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:25:58,176 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 13 states. [2019-09-10 02:25:59,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:25:59,724 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2019-09-10 02:25:59,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 02:25:59,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2019-09-10 02:25:59,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:25:59,726 INFO L225 Difference]: With dead ends: 59 [2019-09-10 02:25:59,726 INFO L226 Difference]: Without dead ends: 54 [2019-09-10 02:25:59,727 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-09-10 02:25:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-10 02:25:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-09-10 02:25:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-10 02:25:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2019-09-10 02:25:59,739 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 25 [2019-09-10 02:25:59,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:25:59,739 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2019-09-10 02:25:59,739 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-10 02:25:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2019-09-10 02:25:59,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-10 02:25:59,740 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:25:59,740 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:25:59,741 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:25:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:59,741 INFO L82 PathProgramCache]: Analyzing trace with hash 999927412, now seen corresponding path program 1 times [2019-09-10 02:25:59,741 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:25:59,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:59,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:59,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:25:59,743 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:25:59,747 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:25:59,747 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:25:59,748 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 [2019-09-10 02:25:59,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:59,763 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:25:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:59,783 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-09-10 02:25:59,783 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [22], [24], [26], [33], [36], [38], [41], [43], [44], [45], [46], [48], [49] [2019-09-10 02:25:59,785 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:25:59,785 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:25:59,795 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 02:25:59,857 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:25:59,857 INFO L272 AbstractInterpreter]: Visited 17 different actions 29 times. Merged at 5 different actions 5 times. Never widened. Performed 52 root evaluator evaluations with a maximum evaluation depth of 10. Performed 52 inverse root evaluator evaluations with a maximum inverse evaluation depth of 10. Found 3 fixpoints after 3 different actions. Largest state had 7 variables. [2019-09-10 02:25:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:25:59,858 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:25:59,858 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:25:59,858 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 [2019-09-10 02:25:59,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:25:59,876 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:25:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:25:59,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-10 02:25:59,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:26:01,273 WARN L188 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 13 [2019-09-10 02:26:02,613 WARN L188 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 14 [2019-09-10 02:26:02,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:02,615 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:07,440 WARN L188 SmtUtils]: Spent 4.80 s on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2019-09-10 02:26:09,309 WARN L188 SmtUtils]: Spent 1.83 s on a formula simplification that was a NOOP. DAG size: 28 [2019-09-10 02:26:14,387 WARN L188 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2019-09-10 02:26:14,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:14,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,407 WARN L188 SmtUtils]: Spent 4.95 s on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2019-09-10 02:26:19,413 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 02:26:19,455 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:26:19,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,644 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,646 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,793 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:19,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:27,725 WARN L188 SmtUtils]: Spent 3.21 s on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-09-10 02:26:27,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:26:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 02:26:34,193 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:26:34,193 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2019-09-10 02:26:34,193 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:26:34,194 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-10 02:26:34,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-10 02:26:34,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=302, Unknown=5, NotChecked=0, Total=380 [2019-09-10 02:26:34,195 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 20 states. [2019-09-10 02:26:38,447 WARN L188 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 39 DAG size of output: 18 [2019-09-10 02:26:42,808 WARN L188 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2019-09-10 02:26:47,985 WARN L188 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 37 DAG size of output: 24 [2019-09-10 02:26:52,588 WARN L188 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2019-09-10 02:27:02,201 WARN L188 SmtUtils]: Spent 4.28 s on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-09-10 02:27:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:27:02,453 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-09-10 02:27:02,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-10 02:27:02,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2019-09-10 02:27:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:27:02,458 INFO L225 Difference]: With dead ends: 76 [2019-09-10 02:27:02,458 INFO L226 Difference]: Without dead ends: 76 [2019-09-10 02:27:02,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=164, Invalid=643, Unknown=5, NotChecked=0, Total=812 [2019-09-10 02:27:02,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-10 02:27:02,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-09-10 02:27:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-10 02:27:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2019-09-10 02:27:02,470 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 28 [2019-09-10 02:27:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:27:02,470 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2019-09-10 02:27:02,471 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-10 02:27:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2019-09-10 02:27:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-10 02:27:02,472 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:27:02,472 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:27:02,473 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:27:02,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:27:02,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1797628174, now seen corresponding path program 2 times [2019-09-10 02:27:02,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:27:02,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:02,474 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:27:02,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:27:02,474 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:27:02,478 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:27:02,478 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:27:02,478 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 [2019-09-10 02:27:02,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:27:02,509 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:27:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:27:02,525 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:27:02,525 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:27:02,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:27:02,525 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 [2019-09-10 02:27:02,539 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:27:02,540 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 02:27:02,596 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-10 02:27:02,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:27:02,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-10 02:27:02,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:27:02,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:02,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:02,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:02,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:02,692 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:02,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:02,933 WARN L188 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2019-09-10 02:27:03,356 WARN L188 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2019-09-10 02:27:03,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:03,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:03,902 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-09-10 02:27:03,959 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:27:04,026 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:04,406 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:04,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:04,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:04,409 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,712 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,722 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,946 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:06,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:07,135 WARN L188 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2019-09-10 02:27:07,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:27:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-09-10 02:27:07,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:27:07,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2019-09-10 02:27:07,166 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:27:07,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-10 02:27:07,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-10 02:27:07,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=304, Unknown=5, NotChecked=0, Total=380 [2019-09-10 02:27:07,168 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 20 states. [2019-09-10 02:27:07,586 WARN L188 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2019-09-10 02:27:09,425 WARN L188 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2019-09-10 02:27:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:27:09,444 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2019-09-10 02:27:09,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-10 02:27:09,444 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2019-09-10 02:27:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:27:09,445 INFO L225 Difference]: With dead ends: 80 [2019-09-10 02:27:09,445 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:27:09,446 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=146, Invalid=498, Unknown=6, NotChecked=0, Total=650 [2019-09-10 02:27:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:27:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:27:09,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:27:09,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:27:09,447 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2019-09-10 02:27:09,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:27:09,447 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:27:09,447 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-10 02:27:09,447 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:27:09,447 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:27:09,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:27:09 BoogieIcfgContainer [2019-09-10 02:27:09,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:27:09,455 INFO L168 Benchmark]: Toolchain (without parser) took 102156.94 ms. Allocated memory was 133.7 MB in the beginning and 290.5 MB in the end (delta: 156.8 MB). Free memory was 90.1 MB in the beginning and 79.6 MB in the end (delta: 10.4 MB). Peak memory consumption was 167.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:27:09,456 INFO L168 Benchmark]: CDTParser took 1.08 ms. Allocated memory is still 133.7 MB. Free memory was 108.3 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:27:09,457 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.26 ms. Allocated memory is still 133.7 MB. Free memory was 89.9 MB in the beginning and 80.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-09-10 02:27:09,458 INFO L168 Benchmark]: Boogie Preprocessor took 122.59 ms. Allocated memory was 133.7 MB in the beginning and 199.2 MB in the end (delta: 65.5 MB). Free memory was 80.0 MB in the beginning and 175.2 MB in the end (delta: -95.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2019-09-10 02:27:09,458 INFO L168 Benchmark]: RCFGBuilder took 233.87 ms. Allocated memory is still 199.2 MB. Free memory was 175.2 MB in the beginning and 163.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-10 02:27:09,459 INFO L168 Benchmark]: TraceAbstraction took 101498.42 ms. Allocated memory was 199.2 MB in the beginning and 290.5 MB in the end (delta: 91.2 MB). Free memory was 163.2 MB in the beginning and 79.6 MB in the end (delta: 83.6 MB). Peak memory consumption was 174.8 MB. Max. memory is 7.1 GB. [2019-09-10 02:27:09,463 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.08 ms. Allocated memory is still 133.7 MB. Free memory was 108.3 MB in the beginning and 108.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.26 ms. Allocated memory is still 133.7 MB. Free memory was 89.9 MB in the beginning and 80.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.59 ms. Allocated memory was 133.7 MB in the beginning and 199.2 MB in the end (delta: 65.5 MB). Free memory was 80.0 MB in the beginning and 175.2 MB in the end (delta: -95.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 233.87 ms. Allocated memory is still 199.2 MB. Free memory was 175.2 MB in the beginning and 163.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 101498.42 ms. Allocated memory was 199.2 MB in the beginning and 290.5 MB in the end (delta: 91.2 MB). Free memory was 163.2 MB in the beginning and 79.6 MB in the end (delta: 83.6 MB). Peak memory consumption was 174.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: 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, 22 locations, 1 error locations. SAFE Result, 101.4s OverallTime, 7 OverallIterations, 5 TraceHistogramMax, 34.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 102 SDtfs, 124 SDslu, 492 SDs, 0 SdLazy, 613 SolverSat, 98 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 10.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 210 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 88.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 65.5s InterpolantComputationTime, 304 NumberOfCodeBlocks, 295 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 291 ConstructedInterpolants, 55 QuantifiedInterpolants, 88197 SizeOfPredicates, 29 NumberOfNonLiveVariables, 345 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 170/212 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...