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/ps6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 21:15:07,482 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 21:15:07,484 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 21:15:07,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 21:15:07,500 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 21:15:07,501 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 21:15:07,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 21:15:07,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 21:15:07,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 21:15:07,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 21:15:07,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 21:15:07,508 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 21:15:07,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 21:15:07,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 21:15:07,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 21:15:07,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 21:15:07,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 21:15:07,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 21:15:07,515 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 21:15:07,516 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 21:15:07,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 21:15:07,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 21:15:07,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 21:15:07,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 21:15:07,526 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 21:15:07,530 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-03 21:15:07,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-03 21:15:07,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-03 21:15:07,535 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-03 21:15:07,536 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-03 21:15:07,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-03 21:15:07,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-03 21:15:07,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-03 21:15:07,537 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 21:15:07,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 21:15:07,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 21:15:07,543 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 21:15:07,562 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 21:15:07,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 21:15:07,563 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 21:15:07,563 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 21:15:07,564 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 21:15:07,564 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 21:15:07,564 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 21:15:07,564 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 21:15:07,565 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 21:15:07,565 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 21:15:07,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 21:15:07,566 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 21:15:07,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 21:15:07,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 21:15:07,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 21:15:07,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 21:15:07,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 21:15:07,567 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 21:15:07,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 21:15:07,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 21:15:07,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 21:15:07,567 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 21:15:07,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 21:15:07,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 21:15:07,568 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 21:15:07,568 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 21:15:07,568 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 21:15:07,569 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 21:15:07,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 21:15:07,569 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 21:15:07,601 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 21:15:07,615 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 21:15:07,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 21:15:07,621 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 21:15:07,622 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 21:15:07,623 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6.c [2019-09-03 21:15:07,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f439cb0/eac794c17176424caead9102c12c9fd6/FLAG4d0969151 [2019-09-03 21:15:08,116 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 21:15:08,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6.c [2019-09-03 21:15:08,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f439cb0/eac794c17176424caead9102c12c9fd6/FLAG4d0969151 [2019-09-03 21:15:08,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/15f439cb0/eac794c17176424caead9102c12c9fd6 [2019-09-03 21:15:08,538 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 21:15:08,539 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 21:15:08,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 21:15:08,541 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 21:15:08,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 21:15:08,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d21465a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08, skipping insertion in model container [2019-09-03 21:15:08,550 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,556 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 21:15:08,572 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 21:15:08,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:15:08,751 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 21:15:08,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 21:15:08,787 INFO L192 MainTranslator]: Completed translation [2019-09-03 21:15:08,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08 WrapperNode [2019-09-03 21:15:08,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 21:15:08,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 21:15:08,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 21:15:08,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 21:15:08,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (1/1) ... [2019-09-03 21:15:08,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 21:15:08,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 21:15:08,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 21:15:08,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 21:15:08,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (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 21:15:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 21:15:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 21:15:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 21:15:08,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 21:15:08,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 21:15:08,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 21:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 21:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 21:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 21:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 21:15:08,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 21:15:09,101 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 21:15:09,102 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 21:15:09,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:15:09 BoogieIcfgContainer [2019-09-03 21:15:09,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 21:15:09,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 21:15:09,104 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 21:15:09,107 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 21:15:09,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 09:15:08" (1/3) ... [2019-09-03 21:15:09,108 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd69a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:15:09, skipping insertion in model container [2019-09-03 21:15:09,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 09:15:08" (2/3) ... [2019-09-03 21:15:09,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd69a5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 09:15:09, skipping insertion in model container [2019-09-03 21:15:09,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 09:15:09" (3/3) ... [2019-09-03 21:15:09,110 INFO L109 eAbstractionObserver]: Analyzing ICFG ps6.c [2019-09-03 21:15:09,120 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 21:15:09,130 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 21:15:09,143 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 21:15:09,168 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 21:15:09,169 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 21:15:09,169 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 21:15:09,169 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 21:15:09,169 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 21:15:09,169 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 21:15:09,169 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 21:15:09,170 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 21:15:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-09-03 21:15:09,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:15:09,189 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:09,190 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:09,191 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:09,195 INFO L82 PathProgramCache]: Analyzing trace with hash -148746498, now seen corresponding path program 1 times [2019-09-03 21:15:09,197 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:09,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:09,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:09,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:09,234 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:09,295 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 21:15:09,297 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:15:09,298 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 21:15:09,298 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:15:09,302 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 21:15:09,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 21:15:09,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 21:15:09,315 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2019-09-03 21:15:09,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:09,333 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 21:15:09,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 21:15:09,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 21:15:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:09,343 INFO L225 Difference]: With dead ends: 21 [2019-09-03 21:15:09,343 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 21:15:09,345 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 21:15:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 21:15:09,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 21:15:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 21:15:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 21:15:09,376 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 21:15:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:09,377 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 21:15:09,377 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 21:15:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 21:15:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 21:15:09,379 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:09,379 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:09,379 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:09,380 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-09-03 21:15:09,380 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:09,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:09,381 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:09,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:09,382 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:09,387 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:09,387 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:09,388 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) [2019-09-03 21:15:09,411 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:09,412 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:15:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:09,425 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-03 21:15:09,426 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:15:09,426 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:09,427 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 21:15:09,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:09,441 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:15:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:09,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 21:15:09,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:09,590 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 21:15:09,591 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:15:09,668 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 21:15:09,672 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-03 21:15:09,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-03 21:15:09,673 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 21:15:09,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 21:15:09,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 21:15:09,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-03 21:15:09,675 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2019-09-03 21:15:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:09,750 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-09-03 21:15:09,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 21:15:09,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 21:15:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:09,751 INFO L225 Difference]: With dead ends: 25 [2019-09-03 21:15:09,752 INFO L226 Difference]: Without dead ends: 23 [2019-09-03 21:15:09,753 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-03 21:15:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-03 21:15:09,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-03 21:15:09,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 21:15:09,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-03 21:15:09,761 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2019-09-03 21:15:09,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:09,762 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-03 21:15:09,762 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 21:15:09,762 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-03 21:15:09,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-03 21:15:09,763 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:09,763 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:09,764 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:09,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:09,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1425845280, now seen corresponding path program 1 times [2019-09-03 21:15:09,765 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:09,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:09,766 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:09,766 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:09,766 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:09,770 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:09,771 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:09,771 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 [2019-09-03 21:15:09,791 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:09,792 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:15:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:09,805 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 18 with the following transitions: [2019-09-03 21:15:09,807 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [27], [30], [32], [35], [37], [38], [39], [40], [42], [43] [2019-09-03 21:15:09,841 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:15:09,841 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:15:10,013 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:15:10,018 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 12 root evaluator evaluations with a maximum evaluation depth of 15. Performed 12 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 5 variables. [2019-09-03 21:15:10,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:10,023 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:15:10,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:10,024 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 [2019-09-03 21:15:10,052 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:10,052 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-03 21:15:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:10,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 21:15:10,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 21:15:10,145 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:15:10,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:10,301 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (5)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 21:15:10,351 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:15:10,351 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-09-03 21:15:10,351 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:15:10,352 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 21:15:10,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 21:15:10,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-03 21:15:10,352 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2019-09-03 21:15:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:10,513 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-09-03 21:15:10,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 21:15:10,514 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 17 [2019-09-03 21:15:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:10,516 INFO L225 Difference]: With dead ends: 32 [2019-09-03 21:15:10,516 INFO L226 Difference]: Without dead ends: 30 [2019-09-03 21:15:10,516 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-09-03 21:15:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-03 21:15:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-09-03 21:15:10,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 21:15:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2019-09-03 21:15:10,527 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 17 [2019-09-03 21:15:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:10,528 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2019-09-03 21:15:10,528 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 21:15:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2019-09-03 21:15:10,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 21:15:10,530 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:10,530 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:10,531 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:10,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:10,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1054216485, now seen corresponding path program 1 times [2019-09-03 21:15:10,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:10,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:10,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:10,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:10,534 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:10,544 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:10,545 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:10,545 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) [2019-09-03 21:15:10,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:10,559 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-03 21:15:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:10,572 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-09-03 21:15:10,573 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [17], [19], [27], [30], [32], [35], [37], [38], [39], [40], [42], [43], [44], [45], [46] [2019-09-03 21:15:10,580 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 21:15:10,580 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 21:15:10,631 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-03 21:15:10,631 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 12 root evaluator evaluations with a maximum evaluation depth of 15. Performed 12 inverse root evaluator evaluations with a maximum inverse evaluation depth of 15. Never found a fixpoint. Largest state had 5 variables. [2019-09-03 21:15:10,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:10,632 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-03 21:15:10,633 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:10,633 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 21:15:10,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:10,655 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 21:15:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:10,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-03 21:15:10,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:10,790 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 21:15:10,822 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:15:10,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:11,691 WARN L188 SmtUtils]: Spent 616.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-09-03 21:15:11,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:16,471 WARN L188 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 51 [2019-09-03 21:15:16,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:18,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:18,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-03 21:15:18,984 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:15:18,984 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-09-03 21:15:18,984 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:15:18,985 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 21:15:18,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 21:15:18,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=189, Unknown=2, NotChecked=0, Total=240 [2019-09-03 21:15:18,986 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 16 states. [2019-09-03 21:15:21,359 WARN L188 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 61 DAG size of output: 24 [2019-09-03 21:15:23,502 WARN L188 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2019-09-03 21:15:24,690 WARN L188 SmtUtils]: Spent 929.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2019-09-03 21:15:33,798 WARN L188 SmtUtils]: Spent 6.93 s on a formula simplification that was a NOOP. DAG size: 55 [2019-09-03 21:15:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:15:44,111 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-03 21:15:44,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 21:15:44,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2019-09-03 21:15:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:15:44,114 INFO L225 Difference]: With dead ends: 46 [2019-09-03 21:15:44,114 INFO L226 Difference]: Without dead ends: 38 [2019-09-03 21:15:44,115 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=98, Invalid=356, Unknown=8, NotChecked=0, Total=462 [2019-09-03 21:15:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-03 21:15:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-09-03 21:15:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 21:15:44,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2019-09-03 21:15:44,122 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 28 [2019-09-03 21:15:44,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:15:44,122 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2019-09-03 21:15:44,122 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 21:15:44,122 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2019-09-03 21:15:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 21:15:44,124 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 21:15:44,124 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 21:15:44,124 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 21:15:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 21:15:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash -705610227, now seen corresponding path program 2 times [2019-09-03 21:15:44,125 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 21:15:44,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:44,126 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 21:15:44,126 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 21:15:44,126 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 21:15:44,130 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-03 21:15:44,130 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-03 21:15:44,130 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 21:15:44,143 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 21:15:44,143 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-03 21:15:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 21:15:44,160 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-03 21:15:44,160 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-03 21:15:44,160 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 21:15:44,161 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 21:15:44,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 21:15:44,181 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-03 21:15:44,211 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 21:15:44,211 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 21:15:44,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2019-09-03 21:15:44,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 21:15:44,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:15:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-03 21:15:44,381 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-03 21:16:17,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:16:27,415 WARN L188 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 47 [2019-09-03 21:16:27,418 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-03 21:16:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 11 proven. 33 refuted. 13 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-03 21:16:27,720 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 21:16:27,720 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2019-09-03 21:16:27,720 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-03 21:16:27,721 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-03 21:16:27,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-03 21:16:27,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=357, Unknown=24, NotChecked=0, Total=462 [2019-09-03 21:16:27,723 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 22 states. [2019-09-03 21:16:36,497 WARN L188 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2019-09-03 21:16:49,813 WARN L188 SmtUtils]: Spent 6.89 s on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2019-09-03 21:17:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 21:17:01,058 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-09-03 21:17:01,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 21:17:01,059 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2019-09-03 21:17:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 21:17:01,059 INFO L225 Difference]: With dead ends: 41 [2019-09-03 21:17:01,059 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 21:17:01,060 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 67.0s TimeCoverageRelationStatistics Valid=172, Invalid=729, Unknown=29, NotChecked=0, Total=930 [2019-09-03 21:17:01,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 21:17:01,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 21:17:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 21:17:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 21:17:01,061 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2019-09-03 21:17:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 21:17:01,061 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 21:17:01,061 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-03 21:17:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 21:17:01,061 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 21:17:01,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 09:17:01 BoogieIcfgContainer [2019-09-03 21:17:01,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 21:17:01,067 INFO L168 Benchmark]: Toolchain (without parser) took 112527.48 ms. Allocated memory was 133.2 MB in the beginning and 261.6 MB in the end (delta: 128.5 MB). Free memory was 89.5 MB in the beginning and 203.7 MB in the end (delta: -114.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2019-09-03 21:17:01,068 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 133.2 MB. Free memory was 107.4 MB in the beginning and 107.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 21:17:01,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.54 ms. Allocated memory is still 133.2 MB. Free memory was 89.1 MB in the beginning and 79.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-03 21:17:01,069 INFO L168 Benchmark]: Boogie Preprocessor took 112.02 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 79.7 MB in the beginning and 176.8 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-03 21:17:01,070 INFO L168 Benchmark]: RCFGBuilder took 202.49 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 165.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2019-09-03 21:17:01,071 INFO L168 Benchmark]: TraceAbstraction took 111961.46 ms. Allocated memory was 200.3 MB in the beginning and 261.6 MB in the end (delta: 61.3 MB). Free memory was 165.0 MB in the beginning and 203.7 MB in the end (delta: -38.7 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2019-09-03 21:17:01,075 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 133.2 MB. Free memory was 107.4 MB in the beginning and 107.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.54 ms. Allocated memory is still 133.2 MB. Free memory was 89.1 MB in the beginning and 79.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.02 ms. Allocated memory was 133.2 MB in the beginning and 200.3 MB in the end (delta: 67.1 MB). Free memory was 79.7 MB in the beginning and 176.8 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 202.49 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 165.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 111961.46 ms. Allocated memory was 200.3 MB in the beginning and 261.6 MB in the end (delta: 61.3 MB). Free memory was 165.0 MB in the beginning and 203.7 MB in the end (delta: -38.7 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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, 21 locations, 1 error locations. SAFE Result, 111.9s OverallTime, 5 OverallIterations, 7 TraceHistogramMax, 58.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 83 SDtfs, 83 SDslu, 382 SDs, 0 SdLazy, 444 SolverSat, 67 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 22.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 226 GetRequests, 154 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 88.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 52.3s InterpolantComputationTime, 218 NumberOfCodeBlocks, 218 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 209 ConstructedInterpolants, 15 QuantifiedInterpolants, 56549 SizeOfPredicates, 18 NumberOfNonLiveVariables, 260 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 140/254 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...