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/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 13:17:48,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 13:17:48,324 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 13:17:48,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-05 13:17:48,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-05 13:17:48,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-05 13:17:48,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-05 13:17:48,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-05 13:17:48,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-05 13:17:48,358 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-05 13:17:48,359 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-05 13:17:48,360 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-09-05 13:17:48,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 13:17:48,387 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 13:17:48,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 13:17:48,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 13:17:48,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 13:17:48,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 13:17:48,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 13:17:48,393 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-05 13:17:48,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 13:17:48,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 13:17:48,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 13:17:48,397 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 [2019-09-05 13:17:48,422 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 13:17:48,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 13:17:48,424 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 13:17:48,424 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 13:17:48,425 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 13:17:48,426 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 13:17:48,426 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 13:17:48,426 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 13:17:48,426 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 13:17:48,426 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 13:17:48,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 13:17:48,429 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 13:17:48,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 13:17:48,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 13:17:48,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 13:17:48,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 13:17:48,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 13:17:48,430 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 13:17:48,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 13:17:48,431 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 13:17:48,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 13:17:48,431 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 13:17:48,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 13:17:48,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 13:17:48,432 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 13:17:48,432 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 13:17:48,433 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 13:17:48,433 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 13:17:48,433 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 13:17:48,433 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 13:17:48,486 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 13:17:48,499 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 13:17:48,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 13:17:48,506 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 13:17:48,506 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 13:17:48,507 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2019-09-05 13:17:48,578 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57b696ca7/dabfc141082c41ff9cc7860fe643b1fb/FLAG8a1d270ce [2019-09-05 13:17:49,027 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 13:17:49,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd.c [2019-09-05 13:17:49,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57b696ca7/dabfc141082c41ff9cc7860fe643b1fb/FLAG8a1d270ce [2019-09-05 13:17:49,049 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57b696ca7/dabfc141082c41ff9cc7860fe643b1fb [2019-09-05 13:17:49,059 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 13:17:49,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 13:17:49,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 13:17:49,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 13:17:49,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 13:17:49,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ccf36b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49, skipping insertion in model container [2019-09-05 13:17:49,070 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,077 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 13:17:49,095 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 13:17:49,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:17:49,255 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 13:17:49,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 13:17:49,286 INFO L192 MainTranslator]: Completed translation [2019-09-05 13:17:49,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49 WrapperNode [2019-09-05 13:17:49,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 13:17:49,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 13:17:49,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 13:17:49,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 13:17:49,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,395 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (1/1) ... [2019-09-05 13:17:49,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 13:17:49,397 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 13:17:49,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 13:17:49,398 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 13:17:49,399 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (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 [2019-09-05 13:17:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 13:17:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 13:17:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 13:17:49,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 13:17:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 13:17:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 13:17:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-05 13:17:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 13:17:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 13:17:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 13:17:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 13:17:49,640 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 13:17:49,640 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 13:17:49,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:17:49 BoogieIcfgContainer [2019-09-05 13:17:49,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 13:17:49,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 13:17:49,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 13:17:49,646 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 13:17:49,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 01:17:49" (1/3) ... [2019-09-05 13:17:49,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24013ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:17:49, skipping insertion in model container [2019-09-05 13:17:49,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 01:17:49" (2/3) ... [2019-09-05 13:17:49,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24013ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 01:17:49, skipping insertion in model container [2019-09-05 13:17:49,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 01:17:49" (3/3) ... [2019-09-05 13:17:49,649 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2019-09-05 13:17:49,657 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 13:17:49,664 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 13:17:49,680 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 13:17:49,706 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 13:17:49,706 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 13:17:49,706 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 13:17:49,706 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 13:17:49,706 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 13:17:49,707 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 13:17:49,707 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 13:17:49,707 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 13:17:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-09-05 13:17:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 13:17:49,728 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:49,729 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:49,732 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:49,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1589353370, now seen corresponding path program 1 times [2019-09-05 13:17:49,737 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:49,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:49,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:49,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:49,782 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:17:49,852 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:17:49,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 13:17:49,852 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:49,855 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 13:17:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 13:17:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 13:17:49,868 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-09-05 13:17:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:49,883 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2019-09-05 13:17:49,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 13:17:49,885 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-05 13:17:49,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:49,894 INFO L225 Difference]: With dead ends: 26 [2019-09-05 13:17:49,894 INFO L226 Difference]: Without dead ends: 21 [2019-09-05 13:17:49,896 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 [2019-09-05 13:17:49,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-05 13:17:49,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-05 13:17:49,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-05 13:17:49,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2019-09-05 13:17:49,934 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 28 transitions. Word has length 10 [2019-09-05 13:17:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:49,934 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 28 transitions. [2019-09-05 13:17:49,935 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 13:17:49,935 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 28 transitions. [2019-09-05 13:17:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 13:17:49,935 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:49,936 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:49,936 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1587685074, now seen corresponding path program 1 times [2019-09-05 13:17:49,937 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:49,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:49,938 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:49,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:49,938 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:49,947 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:49,947 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:49,947 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 [2019-09-05 13:17:49,964 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:49,964 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:17:49,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:49,979 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-05 13:17:49,979 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:17:49,980 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:49,980 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 [2019-09-05 13:17:49,993 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:49,994 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:17:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:50,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 13:17:50,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:17:50,132 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:17:50,220 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:17:50,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-05 13:17:50,221 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:50,221 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:17:50,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:17:50,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 13:17:50,222 INFO L87 Difference]: Start difference. First operand 21 states and 28 transitions. Second operand 5 states. [2019-09-05 13:17:50,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:50,342 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2019-09-05 13:17:50,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:17:50,343 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-05 13:17:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:50,344 INFO L225 Difference]: With dead ends: 35 [2019-09-05 13:17:50,345 INFO L226 Difference]: Without dead ends: 35 [2019-09-05 13:17:50,346 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 [2019-09-05 13:17:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-09-05 13:17:50,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-09-05 13:17:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-05 13:17:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2019-09-05 13:17:50,359 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 10 [2019-09-05 13:17:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:50,360 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2019-09-05 13:17:50,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:17:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2019-09-05 13:17:50,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-05 13:17:50,361 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:50,361 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:50,361 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:50,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:50,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1592529048, now seen corresponding path program 1 times [2019-09-05 13:17:50,362 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:50,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:50,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:50,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:50,364 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:50,370 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:50,370 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:50,370 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 13:17:50,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:50,388 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:17:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:50,402 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-05 13:17:50,404 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54] [2019-09-05 13:17:50,435 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:50,435 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:50,576 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:50,578 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:50,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:50,582 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:50,582 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:50,582 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 [2019-09-05 13:17:50,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:50,597 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:17:50,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:50,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 13:17:50,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:17:50,669 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 13:17:50,761 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:17:50,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-05 13:17:50,762 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:50,762 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:17:50,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:17:50,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 13:17:50,763 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand 5 states. [2019-09-05 13:17:50,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:50,869 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2019-09-05 13:17:50,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:17:50,873 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-05 13:17:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:50,874 INFO L225 Difference]: With dead ends: 39 [2019-09-05 13:17:50,874 INFO L226 Difference]: Without dead ends: 39 [2019-09-05 13:17:50,875 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-05 13:17:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-05 13:17:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2019-09-05 13:17:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-05 13:17:50,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2019-09-05 13:17:50,894 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 15 [2019-09-05 13:17:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:50,895 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2019-09-05 13:17:50,895 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:17:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2019-09-05 13:17:50,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-05 13:17:50,897 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:50,898 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:50,898 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2040988462, now seen corresponding path program 1 times [2019-09-05 13:17:50,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:50,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:50,900 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:50,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:50,901 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:50,920 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:50,921 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:50,921 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 [2019-09-05 13:17:50,945 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:50,946 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:17:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:50,959 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 21 with the following transitions: [2019-09-05 13:17:50,959 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56] [2019-09-05 13:17:50,963 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:50,963 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:51,012 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:51,013 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:51,013 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:51,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:51,014 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 [2019-09-05 13:17:51,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,034 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:17:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:51,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-05 13:17:51,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 13:17:51,077 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-05 13:17:51,134 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:17:51,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-05 13:17:51,134 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:51,135 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:17:51,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:17:51,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 13:17:51,136 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand 5 states. [2019-09-05 13:17:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:51,212 INFO L93 Difference]: Finished difference Result 61 states and 89 transitions. [2019-09-05 13:17:51,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:17:51,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-09-05 13:17:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:51,218 INFO L225 Difference]: With dead ends: 61 [2019-09-05 13:17:51,218 INFO L226 Difference]: Without dead ends: 59 [2019-09-05 13:17:51,219 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-05 13:17:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-09-05 13:17:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-09-05 13:17:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-05 13:17:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 84 transitions. [2019-09-05 13:17:51,245 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 84 transitions. Word has length 20 [2019-09-05 13:17:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:51,246 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 84 transitions. [2019-09-05 13:17:51,246 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:17:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 84 transitions. [2019-09-05 13:17:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-05 13:17:51,247 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:51,247 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:51,252 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash 113727669, now seen corresponding path program 1 times [2019-09-05 13:17:51,253 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:51,254 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:51,257 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:51,258 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:51,269 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:51,269 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:51,269 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 [2019-09-05 13:17:51,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,291 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:17:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:51,302 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2019-09-05 13:17:51,302 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58] [2019-09-05 13:17:51,305 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:51,305 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:51,337 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:51,338 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:51,338 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:51,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:51,338 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) [2019-09-05 13:17:51,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,359 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 [2019-09-05 13:17:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:51,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-05 13:17:51,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-05 13:17:51,392 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:51,419 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-05 13:17:51,423 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:17:51,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-09-05 13:17:51,423 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:51,424 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:17:51,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:17:51,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-05 13:17:51,425 INFO L87 Difference]: Start difference. First operand 59 states and 84 transitions. Second operand 5 states. [2019-09-05 13:17:51,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:51,469 INFO L93 Difference]: Finished difference Result 63 states and 87 transitions. [2019-09-05 13:17:51,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:17:51,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-09-05 13:17:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:51,471 INFO L225 Difference]: With dead ends: 63 [2019-09-05 13:17:51,471 INFO L226 Difference]: Without dead ends: 63 [2019-09-05 13:17:51,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-05 13:17:51,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-05 13:17:51,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-09-05 13:17:51,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-05 13:17:51,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2019-09-05 13:17:51,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 26 [2019-09-05 13:17:51,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:51,482 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2019-09-05 13:17:51,482 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:17:51,482 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2019-09-05 13:17:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-05 13:17:51,483 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:51,483 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:51,483 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:51,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:51,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1597054094, now seen corresponding path program 1 times [2019-09-05 13:17:51,484 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:51,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:51,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:51,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:51,491 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:51,491 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:51,491 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 [2019-09-05 13:17:51,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,506 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:17:51,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:51,516 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-09-05 13:17:51,516 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [21], [24], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57] [2019-09-05 13:17:51,518 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:51,518 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:51,534 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:51,535 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:51,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:51,535 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:51,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:51,535 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 [2019-09-05 13:17:51,550 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,550 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:17:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:51,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 13:17:51,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-05 13:17:51,607 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-09-05 13:17:51,700 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:17:51,700 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-05 13:17:51,700 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:51,700 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:17:51,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:17:51,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-05 13:17:51,701 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 5 states. [2019-09-05 13:17:51,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:51,769 INFO L93 Difference]: Finished difference Result 71 states and 93 transitions. [2019-09-05 13:17:51,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 13:17:51,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2019-09-05 13:17:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:51,771 INFO L225 Difference]: With dead ends: 71 [2019-09-05 13:17:51,771 INFO L226 Difference]: Without dead ends: 70 [2019-09-05 13:17:51,772 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-05 13:17:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-05 13:17:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-09-05 13:17:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-05 13:17:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2019-09-05 13:17:51,786 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 28 [2019-09-05 13:17:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:51,787 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2019-09-05 13:17:51,787 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:17:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2019-09-05 13:17:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-05 13:17:51,789 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:51,789 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:51,791 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:51,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1857063759, now seen corresponding path program 1 times [2019-09-05 13:17:51,791 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:51,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:51,793 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,793 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:51,793 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:51,812 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:51,812 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:51,813 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) [2019-09-05 13:17:51,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,837 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:17:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:51,851 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-09-05 13:17:51,851 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58], [59], [60] [2019-09-05 13:17:51,855 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:51,856 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:51,884 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:51,884 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:51,885 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:51,885 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:51,885 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) [2019-09-05 13:17:51,913 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:51,913 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:17:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:51,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-05 13:17:51,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-05 13:17:51,985 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-05 13:17:52,071 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-05 13:17:52,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-09-05 13:17:52,072 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:52,072 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-05 13:17:52,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-05 13:17:52,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:17:52,073 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 6 states. [2019-09-05 13:17:52,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:52,191 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2019-09-05 13:17:52,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:17:52,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-09-05 13:17:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:52,192 INFO L225 Difference]: With dead ends: 79 [2019-09-05 13:17:52,193 INFO L226 Difference]: Without dead ends: 77 [2019-09-05 13:17:52,193 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-09-05 13:17:52,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-05 13:17:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2019-09-05 13:17:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-09-05 13:17:52,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2019-09-05 13:17:52,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2019-09-05 13:17:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:52,201 INFO L475 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2019-09-05 13:17:52,201 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-05 13:17:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2019-09-05 13:17:52,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-09-05 13:17:52,203 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:52,203 INFO L399 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:52,203 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:52,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:52,203 INFO L82 PathProgramCache]: Analyzing trace with hash -493170476, now seen corresponding path program 2 times [2019-09-05 13:17:52,204 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:52,204 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:52,204 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:52,205 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:52,205 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:52,209 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:52,210 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:52,210 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:17:52,234 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:17:52,234 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:17:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:52,246 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-05 13:17:52,247 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-05 13:17:52,247 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:52,247 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:17:52,267 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-05 13:17:52,267 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:17:52,282 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-05 13:17:52,282 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-05 13:17:52,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-05 13:17:52,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-05 13:17:52,348 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-05 13:17:52,427 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:17:52,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-05 13:17:52,427 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:17:52,428 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-05 13:17:52,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-05 13:17:52,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:17:52,429 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand 10 states. [2019-09-05 13:17:52,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:52,711 INFO L93 Difference]: Finished difference Result 98 states and 128 transitions. [2019-09-05 13:17:52,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-05 13:17:52,714 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-09-05 13:17:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:52,715 INFO L225 Difference]: With dead ends: 98 [2019-09-05 13:17:52,715 INFO L226 Difference]: Without dead ends: 97 [2019-09-05 13:17:52,716 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2019-09-05 13:17:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-05 13:17:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-09-05 13:17:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-05 13:17:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2019-09-05 13:17:52,726 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 33 [2019-09-05 13:17:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:52,726 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2019-09-05 13:17:52,726 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-05 13:17:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2019-09-05 13:17:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-05 13:17:52,728 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:52,728 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:52,729 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:52,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:52,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1383929332, now seen corresponding path program 1 times [2019-09-05 13:17:52,729 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:52,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:52,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-05 13:17:52,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:52,730 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:52,735 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:52,735 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:52,735 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:17:52,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:52,745 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:17:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:52,760 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 47 with the following transitions: [2019-09-05 13:17:52,760 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [21], [24], [26], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57] [2019-09-05 13:17:52,767 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:52,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:52,793 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:52,793 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:52,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:52,793 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:52,793 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:52,793 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:17:52,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:52,821 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:17:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:52,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-05 13:17:52,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-05 13:17:52,923 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-09-05 13:17:53,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 13:17:53,019 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-09-05 13:17:53,019 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 13:17:53,019 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 13:17:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 13:17:53,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-09-05 13:17:53,020 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand 5 states. [2019-09-05 13:17:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:53,069 INFO L93 Difference]: Finished difference Result 99 states and 126 transitions. [2019-09-05 13:17:53,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-05 13:17:53,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2019-09-05 13:17:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:53,071 INFO L225 Difference]: With dead ends: 99 [2019-09-05 13:17:53,071 INFO L226 Difference]: Without dead ends: 98 [2019-09-05 13:17:53,072 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-05 13:17:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-09-05 13:17:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2019-09-05 13:17:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-05 13:17:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 121 transitions. [2019-09-05 13:17:53,081 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 121 transitions. Word has length 46 [2019-09-05 13:17:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:53,082 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 121 transitions. [2019-09-05 13:17:53,082 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 13:17:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 121 transitions. [2019-09-05 13:17:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-05 13:17:53,084 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:53,085 INFO L399 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:53,085 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:53,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1196309741, now seen corresponding path program 1 times [2019-09-05 13:17:53,088 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:53,089 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:53,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:53,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:53,092 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:53,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:53,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:53,101 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-05 13:17:53,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:53,119 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:17:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:53,133 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 50 with the following transitions: [2019-09-05 13:17:53,134 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [21], [24], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58], [59], [60] [2019-09-05 13:17:53,137 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:53,137 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:53,157 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:53,158 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:53,158 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:53,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:53,159 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-05 13:17:53,178 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:53,179 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:17:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:53,199 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-05 13:17:53,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:53,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:17:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-05 13:17:53,320 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:53,375 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:17:53,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:17:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-09-05 13:17:53,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:17:53,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-05 13:17:53,411 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:17:53,412 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-05 13:17:53,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-05 13:17:53,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-05 13:17:53,413 INFO L87 Difference]: Start difference. First operand 96 states and 121 transitions. Second operand 13 states. [2019-09-05 13:17:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:53,619 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2019-09-05 13:17:53,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-05 13:17:53,620 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-09-05 13:17:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:53,623 INFO L225 Difference]: With dead ends: 107 [2019-09-05 13:17:53,623 INFO L226 Difference]: Without dead ends: 103 [2019-09-05 13:17:53,624 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-09-05 13:17:53,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-05 13:17:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2019-09-05 13:17:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-09-05 13:17:53,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2019-09-05 13:17:53,644 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 49 [2019-09-05 13:17:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:53,645 INFO L475 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2019-09-05 13:17:53,645 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-05 13:17:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2019-09-05 13:17:53,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-05 13:17:53,650 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 13:17:53,650 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 13:17:53,650 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 13:17:53,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:53,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1737231151, now seen corresponding path program 1 times [2019-09-05 13:17:53,651 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 13:17:53,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:53,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:53,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 13:17:53,652 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 13:17:53,662 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-05 13:17:53,662 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-05 13:17:53,663 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-05 13:17:53,674 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:53,675 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-05 13:17:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:53,691 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 60 with the following transitions: [2019-09-05 13:17:53,691 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [19], [21], [26], [37], [40], [42], [45], [47], [48], [49], [50], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62], [63], [64] [2019-09-05 13:17:53,694 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 13:17:53,694 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 13:17:53,706 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 13:17:53,706 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 38 root evaluator evaluations with a maximum evaluation depth of 7. Performed 38 inverse root evaluator evaluations with a maximum inverse evaluation depth of 7. Never found a fixpoint. Largest state had 10 variables. [2019-09-05 13:17:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 13:17:53,706 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 13:17:53,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 13:17:53,707 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 13:17:53,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 13:17:53,731 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 13:17:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 13:17:53,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-05 13:17:53,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 13:17:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-09-05 13:17:53,794 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 13:17:53,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-05 13:17:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 33 proven. 10 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-05 13:17:53,900 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-05 13:17:53,900 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2019-09-05 13:17:53,901 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 13:17:53,902 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-05 13:17:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-05 13:17:53,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-09-05 13:17:53,904 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 9 states. [2019-09-05 13:17:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 13:17:54,053 INFO L93 Difference]: Finished difference Result 106 states and 127 transitions. [2019-09-05 13:17:54,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-05 13:17:54,053 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2019-09-05 13:17:54,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 13:17:54,054 INFO L225 Difference]: With dead ends: 106 [2019-09-05 13:17:54,054 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 13:17:54,055 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-05 13:17:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 13:17:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 13:17:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 13:17:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 13:17:54,056 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2019-09-05 13:17:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 13:17:54,056 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 13:17:54,056 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-05 13:17:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 13:17:54,056 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 13:17:54,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 01:17:54 BoogieIcfgContainer [2019-09-05 13:17:54,061 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 13:17:54,064 INFO L168 Benchmark]: Toolchain (without parser) took 5002.13 ms. Allocated memory was 133.2 MB in the beginning and 259.5 MB in the end (delta: 126.4 MB). Free memory was 87.7 MB in the beginning and 109.6 MB in the end (delta: -21.9 MB). Peak memory consumption was 104.5 MB. Max. memory is 7.1 GB. [2019-09-05 13:17:54,065 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 13:17:54,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.94 ms. Allocated memory is still 133.2 MB. Free memory was 87.5 MB in the beginning and 77.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-09-05 13:17:54,066 INFO L168 Benchmark]: Boogie Preprocessor took 109.90 ms. Allocated memory was 133.2 MB in the beginning and 201.3 MB in the end (delta: 68.2 MB). Free memory was 77.7 MB in the beginning and 177.8 MB in the end (delta: -100.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-05 13:17:54,068 INFO L168 Benchmark]: RCFGBuilder took 244.56 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 165.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2019-09-05 13:17:54,068 INFO L168 Benchmark]: TraceAbstraction took 4418.66 ms. Allocated memory was 201.3 MB in the beginning and 259.5 MB in the end (delta: 58.2 MB). Free memory was 164.4 MB in the beginning and 109.6 MB in the end (delta: 54.8 MB). Peak memory consumption was 113.0 MB. Max. memory is 7.1 GB. [2019-09-05 13:17:54,072 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 133.2 MB. Free memory was 106.0 MB in the beginning and 105.8 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.94 ms. Allocated memory is still 133.2 MB. Free memory was 87.5 MB in the beginning and 77.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.90 ms. Allocated memory was 133.2 MB in the beginning and 201.3 MB in the end (delta: 68.2 MB). Free memory was 77.7 MB in the beginning and 177.8 MB in the end (delta: -100.1 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.56 ms. Allocated memory is still 201.3 MB. Free memory was 177.8 MB in the beginning and 165.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4418.66 ms. Allocated memory was 201.3 MB in the beginning and 259.5 MB in the end (delta: 58.2 MB). Free memory was 164.4 MB in the beginning and 109.6 MB in the end (delta: 54.8 MB). Peak memory consumption was 113.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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, 26 locations, 1 error locations. SAFE Result, 4.3s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 291 SDtfs, 96 SDslu, 791 SDs, 0 SdLazy, 578 SolverSat, 69 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 642 GetRequests, 548 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 8 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 9 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 644 NumberOfCodeBlocks, 634 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 623 ConstructedInterpolants, 20 QuantifiedInterpolants, 76069 SizeOfPredicates, 45 NumberOfNonLiveVariables, 815 ConjunctsInSsa, 150 ConjunctsInUnsatCore, 21 InterpolantComputations, 14 PerfectInterpolantSequences, 884/934 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...