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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:12:35,419 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:12:35,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:12:35,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:12:35,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 02:12:35,496 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:12:35,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:12:35,497 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:12:35,497 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:12:35,498 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:12:35,498 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:12:35,499 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:12:35,499 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:12:35,499 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:12:35,499 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:12:35,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:12:35,500 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:12:35,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:12:35,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:12:35,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:12:35,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:12:35,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:12:35,502 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:12:35,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:12:35,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:12:35,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:12:35,503 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:12:35,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:12:35,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:12:35,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:12:35,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:12:35,505 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:12:35,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:12:35,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:12:35,506 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:12:35,541 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:12:35,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:12:35,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:12:35,558 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:12:35,558 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:12:35,559 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-09-10 02:12:35,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c0423e/f6571de1c1f1486183d5800b4d81e900/FLAGa65102ccb [2019-09-10 02:12:36,050 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:12:36,051 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-09-10 02:12:36,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c0423e/f6571de1c1f1486183d5800b4d81e900/FLAGa65102ccb [2019-09-10 02:12:36,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/341c0423e/f6571de1c1f1486183d5800b4d81e900 [2019-09-10 02:12:36,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:12:36,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:12:36,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:12:36,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:12:36,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:12:36,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fffac3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36, skipping insertion in model container [2019-09-10 02:12:36,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,470 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:12:36,486 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:12:36,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:12:36,668 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:12:36,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:12:36,706 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:12:36,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36 WrapperNode [2019-09-10 02:12:36,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:12:36,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:12:36,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:12:36,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:12:36,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,838 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... [2019-09-10 02:12:36,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:12:36,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:12:36,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:12:36,842 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:12:36,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:12:36,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:12:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:12:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 02:12:36,895 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:12:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:12:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:12:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:12:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:12:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:12:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:12:36,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:12:37,073 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:12:37,073 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 02:12:37,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:12:37 BoogieIcfgContainer [2019-09-10 02:12:37,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:12:37,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:12:37,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:12:37,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:12:37,080 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:12:36" (1/3) ... [2019-09-10 02:12:37,081 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e7d368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:12:37, skipping insertion in model container [2019-09-10 02:12:37,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:12:36" (2/3) ... [2019-09-10 02:12:37,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e7d368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:12:37, skipping insertion in model container [2019-09-10 02:12:37,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:12:37" (3/3) ... [2019-09-10 02:12:37,102 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-09-10 02:12:37,122 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:12:37,137 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:12:37,157 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:12:37,207 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:12:37,207 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:12:37,207 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:12:37,208 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:12:37,208 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:12:37,208 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:12:37,208 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:12:37,208 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:12:37,225 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-10 02:12:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 02:12:37,235 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:37,236 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:37,238 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:37,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1281911547, now seen corresponding path program 1 times [2019-09-10 02:12:37,247 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:37,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:37,293 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:37,293 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:37,293 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:37,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:12:37,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 02:12:37,352 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:12:37,356 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 02:12:37,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 02:12:37,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:12:37,369 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-10 02:12:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:37,382 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2019-09-10 02:12:37,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 02:12:37,384 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-09-10 02:12:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:37,392 INFO L225 Difference]: With dead ends: 20 [2019-09-10 02:12:37,392 INFO L226 Difference]: Without dead ends: 13 [2019-09-10 02:12:37,395 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:12:37,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-10 02:12:37,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-10 02:12:37,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-10 02:12:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-10 02:12:37,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-10 02:12:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:37,432 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-10 02:12:37,433 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 02:12:37,433 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-10 02:12:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-10 02:12:37,434 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:37,434 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:37,434 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:37,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:37,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1287452673, now seen corresponding path program 1 times [2019-09-10 02:12:37,438 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:37,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:37,441 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:37,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:37,442 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:37,456 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:37,456 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:37,457 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:37,477 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:37,478 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:37,514 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 02:12:37,515 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:12:37,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:37,515 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 02:12:37,544 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:37,544 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:37,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-10 02:12:37,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:37,625 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:37,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:37,650 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:12:37,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-09-10 02:12:37,651 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:12:37,653 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-10 02:12:37,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-10 02:12:37,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-10 02:12:37,654 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 3 states. [2019-09-10 02:12:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:37,672 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-09-10 02:12:37,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-10 02:12:37,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-09-10 02:12:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:37,675 INFO L225 Difference]: With dead ends: 15 [2019-09-10 02:12:37,675 INFO L226 Difference]: Without dead ends: 15 [2019-09-10 02:12:37,677 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-10 02:12:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-10 02:12:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2019-09-10 02:12:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-10 02:12:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-09-10 02:12:37,684 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2019-09-10 02:12:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:37,685 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-09-10 02:12:37,685 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-10 02:12:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-09-10 02:12:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 02:12:37,686 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:37,687 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:37,687 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash 843923389, now seen corresponding path program 1 times [2019-09-10 02:12:37,689 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:37,692 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:37,692 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:37,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:37,693 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:37,713 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:37,713 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:37,713 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) [2019-09-10 02:12:37,740 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:37,740 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:37,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:37,763 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2019-09-10 02:12:37,766 INFO L207 CegarAbsIntRunner]: [0], [4], [8], [14], [16], [18], [25], [28], [30], [36], [37], [38], [40] [2019-09-10 02:12:37,808 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:12:37,809 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:12:37,953 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:12:37,956 INFO L272 AbstractInterpreter]: Visited 13 different actions 44 times. Merged at 3 different actions 14 times. Widened at 1 different actions 3 times. Performed 72 root evaluator evaluations with a maximum evaluation depth of 6. Performed 72 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2019-09-10 02:12:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:37,960 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:12:37,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:37,961 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:37,972 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:37,972 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:12:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:37,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-10 02:12:37,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:38,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:38,115 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:38,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:38,330 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:12:38,330 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-09-10 02:12:38,331 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:12:38,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-10 02:12:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-10 02:12:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-09-10 02:12:38,333 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 14 states. [2019-09-10 02:12:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:38,536 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-09-10 02:12:38,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 02:12:38,537 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2019-09-10 02:12:38,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:38,538 INFO L225 Difference]: With dead ends: 19 [2019-09-10 02:12:38,538 INFO L226 Difference]: Without dead ends: 16 [2019-09-10 02:12:38,539 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-09-10 02:12:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-10 02:12:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-10 02:12:38,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-10 02:12:38,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-10 02:12:38,542 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-09-10 02:12:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:38,543 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-10 02:12:38,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-10 02:12:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-10 02:12:38,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-10 02:12:38,544 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:38,544 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:38,544 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash 396918779, now seen corresponding path program 2 times [2019-09-10 02:12:38,545 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:38,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:38,546 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:12:38,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:38,546 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:38,564 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:38,564 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:38,567 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:38,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:12:38,589 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:38,600 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:12:38,600 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:12:38,601 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:38,601 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:38,617 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:12:38,618 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 02:12:38,644 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-10 02:12:38,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:12:38,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-10 02:12:38,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:38,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:38,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:38,769 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:41,024 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0)) (< main_~n~0 .cse0)))) is different from true [2019-09-10 02:12:41,042 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 1))) (or (< .cse0 main_~n~0) (< main_~n~0 .cse0) (= (+ (* 4 c_main_~i~0) (* 2 c_main_~sum~0) 2) (* (+ main_~n~0 1) main_~n~0))))) is different from true [2019-09-10 02:12:41,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2019-09-10 02:12:41,059 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:12:41,059 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-09-10 02:12:41,059 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:12:41,060 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-10 02:12:41,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-10 02:12:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=197, Unknown=4, NotChecked=58, Total=306 [2019-09-10 02:12:41,062 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 18 states. [2019-09-10 02:12:41,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:41,503 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-09-10 02:12:41,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-10 02:12:41,503 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 15 [2019-09-10 02:12:41,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:41,504 INFO L225 Difference]: With dead ends: 24 [2019-09-10 02:12:41,504 INFO L226 Difference]: Without dead ends: 20 [2019-09-10 02:12:41,505 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=82, Invalid=384, Unknown=4, NotChecked=82, Total=552 [2019-09-10 02:12:41,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-10 02:12:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-10 02:12:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-10 02:12:41,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-09-10 02:12:41,509 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2019-09-10 02:12:41,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:41,509 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-09-10 02:12:41,509 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-10 02:12:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-09-10 02:12:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-10 02:12:41,510 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:12:41,511 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:12:41,511 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:12:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:12:41,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1549375991, now seen corresponding path program 3 times [2019-09-10 02:12:41,511 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:12:41,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:41,512 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:12:41,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:12:41,513 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:12:41,521 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:12:41,521 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:12:41,521 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:12:41,547 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:12:41,547 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:12:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:12:41,557 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:12:41,557 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:12:41,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:12:41,557 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:12:41,567 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-10 02:12:41,568 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2019-09-10 02:12:41,586 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-10 02:12:41,586 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:12:41,588 WARN L254 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-10 02:12:41,591 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:12:41,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:12:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:12:41,812 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:12:42,228 WARN L860 $PredicateComparison]: unable to prove that (forall ((main_~n~0 Int)) (let ((.cse0 (+ c_main_~i~0 2))) (or (= (+ (* 4 c_main_~i~0) (* 2 c_main_~sum~0) 6) (* (+ main_~n~0 1) main_~n~0)) (< .cse0 main_~n~0) (< main_~n~0 .cse0)))) is different from true [2019-09-10 02:12:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 5 refuted. 2 times theorem prover too weak. 3 trivial. 4 not checked. [2019-09-10 02:12:43,934 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:12:43,934 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-09-10 02:12:43,935 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:12:43,935 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-10 02:12:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-10 02:12:43,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=4, NotChecked=40, Total=506 [2019-09-10 02:12:43,936 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 23 states. [2019-09-10 02:12:46,129 WARN L188 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2019-09-10 02:12:46,225 WARN L860 $PredicateComparison]: unable to prove that (and (forall ((main_~n~0 Int)) (or (= (+ (* 2 c_main_~i~0) (* 2 c_main_~sum~0)) (* (+ main_~n~0 1) main_~n~0)) (< c_main_~i~0 main_~n~0) (< main_~n~0 c_main_~i~0))) (or (<= c_main_~i~0 c_main_~n~0) (= (* 2 c_main_~sum~0) (* (+ c_main_~n~0 1) c_main_~n~0)))) is different from true [2019-09-10 02:12:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:12:46,281 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-09-10 02:12:46,281 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-10 02:12:46,282 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 19 [2019-09-10 02:12:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:12:46,282 INFO L225 Difference]: With dead ends: 21 [2019-09-10 02:12:46,283 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:12:46,284 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=143, Invalid=915, Unknown=6, NotChecked=126, Total=1190 [2019-09-10 02:12:46,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:12:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:12:46,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:12:46,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:12:46,284 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-09-10 02:12:46,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:12:46,285 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:12:46,285 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-10 02:12:46,285 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:12:46,285 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:12:46,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:12:46 BoogieIcfgContainer [2019-09-10 02:12:46,289 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:12:46,291 INFO L168 Benchmark]: Toolchain (without parser) took 9841.69 ms. Allocated memory was 135.8 MB in the beginning and 250.1 MB in the end (delta: 114.3 MB). Free memory was 91.3 MB in the beginning and 141.2 MB in the end (delta: -49.9 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:46,292 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 135.8 MB. Free memory was 109.0 MB in the beginning and 108.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:12:46,292 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.29 ms. Allocated memory is still 135.8 MB. Free memory was 91.1 MB in the beginning and 81.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:46,293 INFO L168 Benchmark]: Boogie Preprocessor took 133.41 ms. Allocated memory was 135.8 MB in the beginning and 203.4 MB in the end (delta: 67.6 MB). Free memory was 81.9 MB in the beginning and 180.6 MB in the end (delta: -98.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:46,294 INFO L168 Benchmark]: RCFGBuilder took 233.88 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 168.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:46,295 INFO L168 Benchmark]: TraceAbstraction took 9213.15 ms. Allocated memory was 203.4 MB in the beginning and 250.1 MB in the end (delta: 46.7 MB). Free memory was 168.3 MB in the beginning and 141.2 MB in the end (delta: 27.1 MB). Peak memory consumption was 73.8 MB. Max. memory is 7.1 GB. [2019-09-10 02:12:46,299 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 135.8 MB. Free memory was 109.0 MB in the beginning and 108.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.29 ms. Allocated memory is still 135.8 MB. Free memory was 91.1 MB in the beginning and 81.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.41 ms. Allocated memory was 135.8 MB in the beginning and 203.4 MB in the end (delta: 67.6 MB). Free memory was 81.9 MB in the beginning and 180.6 MB in the end (delta: -98.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 233.88 ms. Allocated memory is still 203.4 MB. Free memory was 180.6 MB in the beginning and 168.9 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9213.15 ms. Allocated memory was 203.4 MB in the beginning and 250.1 MB in the end (delta: 46.7 MB). Free memory was 168.3 MB in the beginning and 141.2 MB in the end (delta: 27.1 MB). Peak memory consumption was 73.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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, 20 locations, 1 error locations. SAFE Result, 9.0s OverallTime, 5 OverallIterations, 4 TraceHistogramMax, 3.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 14 SDslu, 178 SDs, 0 SdLazy, 286 SolverSat, 26 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 7.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 118 ConstructedInterpolants, 10 QuantifiedInterpolants, 10306 SizeOfPredicates, 15 NumberOfNonLiveVariables, 155 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 5/42 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...