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/cohendiv.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:19:53,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:19:53,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:19:53,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:19:53,515 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 02:19:53,528 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:19:53,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:19:53,529 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:19:53,529 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:19:53,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:19:53,530 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:19:53,530 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:19:53,530 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:19:53,531 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:19:53,531 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:19:53,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:19:53,532 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:19:53,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:19:53,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:19:53,532 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:19:53,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:19:53,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:19:53,533 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:19:53,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:19:53,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:19:53,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:19:53,536 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:19:53,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:19:53,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:19:53,536 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:19:53,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:19:53,537 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:19:53,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:19:53,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:19:53,537 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:19:53,566 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:19:53,578 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:19:53,582 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:19:53,584 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:19:53,584 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:19:53,585 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohendiv.c [2019-09-10 02:19:53,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d1c746e/92c994c4b9cd4fc08cc18aa9b0388800/FLAGdd55ea2f7 [2019-09-10 02:19:54,116 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:19:54,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohendiv.c [2019-09-10 02:19:54,123 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d1c746e/92c994c4b9cd4fc08cc18aa9b0388800/FLAGdd55ea2f7 [2019-09-10 02:19:54,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14d1c746e/92c994c4b9cd4fc08cc18aa9b0388800 [2019-09-10 02:19:54,519 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:19:54,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:19:54,521 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:19:54,521 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:19:54,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:19:54,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9fa8fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54, skipping insertion in model container [2019-09-10 02:19:54,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,535 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:19:54,555 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:19:54,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:19:54,715 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:19:54,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:19:54,745 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:19:54,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54 WrapperNode [2019-09-10 02:19:54,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:19:54,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:19:54,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:19:54,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:19:54,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,832 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (1/1) ... [2019-09-10 02:19:54,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:19:54,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:19:54,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:19:54,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:19:54,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (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 02:19:54,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:19:54,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:19:54,905 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-10 02:19:54,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:19:54,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:19:54,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:19:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-10 02:19:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-10 02:19:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:19:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:19:54,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:19:55,089 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:19:55,089 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-10 02:19:55,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:19:55 BoogieIcfgContainer [2019-09-10 02:19:55,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:19:55,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:19:55,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:19:55,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:19:55,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:19:54" (1/3) ... [2019-09-10 02:19:55,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57247e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:19:55, skipping insertion in model container [2019-09-10 02:19:55,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:19:54" (2/3) ... [2019-09-10 02:19:55,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57247e89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:19:55, skipping insertion in model container [2019-09-10 02:19:55,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:19:55" (3/3) ... [2019-09-10 02:19:55,120 INFO L109 eAbstractionObserver]: Analyzing ICFG cohendiv.c [2019-09-10 02:19:55,145 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:19:55,162 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:19:55,198 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:19:55,227 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:19:55,227 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:19:55,227 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:19:55,228 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:19:55,228 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:19:55,228 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:19:55,228 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:19:55,228 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:19:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-09-10 02:19:55,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 02:19:55,253 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:55,253 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:19:55,256 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash -14138861, now seen corresponding path program 1 times [2019-09-10 02:19:55,264 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:55,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:55,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:55,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:55,302 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:55,366 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 02:19:55,368 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:19:55,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 02:19:55,368 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:19:55,373 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 02:19:55,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 02:19:55,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 02:19:55,386 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2019-09-10 02:19:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:55,405 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2019-09-10 02:19:55,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 02:19:55,406 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-10 02:19:55,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:55,416 INFO L225 Difference]: With dead ends: 29 [2019-09-10 02:19:55,416 INFO L226 Difference]: Without dead ends: 24 [2019-09-10 02:19:55,418 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 02:19:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-09-10 02:19:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-09-10 02:19:55,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-10 02:19:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2019-09-10 02:19:55,459 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 10 [2019-09-10 02:19:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:55,460 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2019-09-10 02:19:55,460 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 02:19:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2019-09-10 02:19:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-10 02:19:55,461 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:55,461 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:19:55,461 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:55,462 INFO L82 PathProgramCache]: Analyzing trace with hash -12649311, now seen corresponding path program 1 times [2019-09-10 02:19:55,462 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:55,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:55,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:55,463 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:55,464 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:55,471 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:19:55,471 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:19:55,472 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 02:19:55,491 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:55,491 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:19:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:55,514 INFO L195 CegarAbsIntRunner]: Skipping current iteration for AI because the path program does not contain any loops [2019-09-10 02:19:55,514 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:19:55,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:19:55,515 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 02:19:55,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:55,531 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 02:19:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:55,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 02:19:55,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:19:55,618 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 02:19:55,618 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:19:55,663 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 02:19:55,667 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:19:55,668 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-10 02:19:55,668 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:19:55,669 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:19:55,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:19:55,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-10 02:19:55,670 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand 5 states. [2019-09-10 02:19:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:55,751 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2019-09-10 02:19:55,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:19:55,752 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-10 02:19:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:55,753 INFO L225 Difference]: With dead ends: 33 [2019-09-10 02:19:55,753 INFO L226 Difference]: Without dead ends: 33 [2019-09-10 02:19:55,754 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:19:55,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-10 02:19:55,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-09-10 02:19:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-10 02:19:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-10 02:19:55,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 10 [2019-09-10 02:19:55,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:55,766 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-10 02:19:55,766 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:19:55,766 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-10 02:19:55,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-10 02:19:55,767 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:55,767 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:19:55,767 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash 71526866, now seen corresponding path program 1 times [2019-09-10 02:19:55,768 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:55,769 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:55,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:55,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:55,770 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:55,775 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:19:55,776 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:19:55,776 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 02:19:55,803 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:55,803 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 [2019-09-10 02:19:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:55,820 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-10 02:19:55,822 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67] [2019-09-10 02:19:55,855 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:19:55,856 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:19:55,957 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:19:55,958 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-09-10 02:19:55,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:55,962 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:19:55,962 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:19:55,962 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 02:19:55,984 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:55,984 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:19:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:55,996 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 02:19:55,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:19:56,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:19:56,029 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:19:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:19:56,081 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:19:56,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-09-10 02:19:56,081 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:19:56,082 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:19:56,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:19:56,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-10 02:19:56,083 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-10 02:19:56,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:56,173 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2019-09-10 02:19:56,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:19:56,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-10 02:19:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:56,175 INFO L225 Difference]: With dead ends: 45 [2019-09-10 02:19:56,175 INFO L226 Difference]: Without dead ends: 44 [2019-09-10 02:19:56,176 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:19:56,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-09-10 02:19:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2019-09-10 02:19:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-10 02:19:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-09-10 02:19:56,186 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 15 [2019-09-10 02:19:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:56,186 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-09-10 02:19:56,187 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:19:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-09-10 02:19:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-10 02:19:56,188 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:56,188 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:19:56,188 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash -365378422, now seen corresponding path program 1 times [2019-09-10 02:19:56,189 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:56,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:56,190 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:56,190 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:56,191 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:56,197 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:19:56,198 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:19:56,198 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-09-10 02:19:56,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:56,222 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:19:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:19:56,247 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 23 with the following transitions: [2019-09-10 02:19:56,248 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69] [2019-09-10 02:19:56,249 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:19:56,250 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:19:56,291 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:19:56,292 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-09-10 02:19:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:56,292 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:19:56,292 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:19:56,293 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 02:19:56,319 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:56,319 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:19:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:56,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 02:19:56,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:19:56,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:19:56,391 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:19:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:19:56,437 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:19:56,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2019-09-10 02:19:56,437 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:19:56,438 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 02:19:56,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 02:19:56,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:19:56,439 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 6 states. [2019-09-10 02:19:56,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:56,556 INFO L93 Difference]: Finished difference Result 67 states and 91 transitions. [2019-09-10 02:19:56,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:19:56,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-09-10 02:19:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:56,558 INFO L225 Difference]: With dead ends: 67 [2019-09-10 02:19:56,558 INFO L226 Difference]: Without dead ends: 67 [2019-09-10 02:19:56,559 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-09-10 02:19:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-10 02:19:56,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2019-09-10 02:19:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-10 02:19:56,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2019-09-10 02:19:56,572 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 22 [2019-09-10 02:19:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:56,572 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2019-09-10 02:19:56,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 02:19:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2019-09-10 02:19:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-10 02:19:56,573 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:56,574 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, 1] [2019-09-10 02:19:56,574 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:56,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1963256918, now seen corresponding path program 1 times [2019-09-10 02:19:56,576 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:56,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:56,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:56,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:56,580 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:56,588 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:19:56,588 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:19:56,588 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) [2019-09-10 02:19:56,605 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:19:56,606 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:19:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:56,619 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2019-09-10 02:19:56,619 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73] [2019-09-10 02:19:56,621 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:19:56,621 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:19:56,638 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:19:56,639 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-09-10 02:19:56,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:56,639 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:19:56,639 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:19:56,639 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 02:19:56,657 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:56,657 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:19:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:56,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-10 02:19:56,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:19:56,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:19:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-10 02:19:56,710 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:19:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-09-10 02:19:56,796 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:19:56,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-09-10 02:19:56,796 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:19:56,797 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 02:19:56,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 02:19:56,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-09-10 02:19:56,798 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 6 states. [2019-09-10 02:19:56,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:56,882 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2019-09-10 02:19:56,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:19:56,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2019-09-10 02:19:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:56,892 INFO L225 Difference]: With dead ends: 64 [2019-09-10 02:19:56,892 INFO L226 Difference]: Without dead ends: 64 [2019-09-10 02:19:56,893 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-09-10 02:19:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-10 02:19:56,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-09-10 02:19:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-10 02:19:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2019-09-10 02:19:56,911 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 32 [2019-09-10 02:19:56,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:56,915 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2019-09-10 02:19:56,915 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 02:19:56,915 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2019-09-10 02:19:56,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-09-10 02:19:56,917 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:56,917 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:19:56,917 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:56,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:56,918 INFO L82 PathProgramCache]: Analyzing trace with hash -363064690, now seen corresponding path program 1 times [2019-09-10 02:19:56,918 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:56,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:56,921 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:56,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:56,921 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:56,939 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:19:56,940 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:19:56,940 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) [2019-09-10 02:19:56,957 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:56,957 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:19:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:56,975 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2019-09-10 02:19:56,976 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [37], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73], [74], [75] [2019-09-10 02:19:56,978 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:19:56,978 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:19:57,002 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:19:57,002 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-09-10 02:19:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:57,003 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:19:57,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:19:57,003 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) [2019-09-10 02:19:57,035 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:57,035 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:19:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:57,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-10 02:19:57,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:19:57,122 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:19:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-10 02:19:57,151 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:19:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-10 02:19:57,253 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:19:57,254 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2019-09-10 02:19:57,254 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:19:57,254 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 02:19:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 02:19:57,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:19:57,255 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand 7 states. [2019-09-10 02:19:57,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:57,417 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2019-09-10 02:19:57,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 02:19:57,419 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-09-10 02:19:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:57,421 INFO L225 Difference]: With dead ends: 75 [2019-09-10 02:19:57,421 INFO L226 Difference]: Without dead ends: 75 [2019-09-10 02:19:57,422 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:19:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-10 02:19:57,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2019-09-10 02:19:57,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-09-10 02:19:57,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2019-09-10 02:19:57,438 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 38 [2019-09-10 02:19:57,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:57,439 INFO L475 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2019-09-10 02:19:57,439 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 02:19:57,441 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2019-09-10 02:19:57,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-09-10 02:19:57,444 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:57,444 INFO L399 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:19:57,444 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:57,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1044881029, now seen corresponding path program 1 times [2019-09-10 02:19:57,445 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:57,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:57,446 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:57,446 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:57,446 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:57,451 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:19:57,451 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:19:57,451 INFO L170 anRefinementStrategy]: Switched to traceCheck mode Z3_NO_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-09-10 02:19:57,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:57,471 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:19:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:57,499 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 46 with the following transitions: [2019-09-10 02:19:57,499 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [35], [43], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73], [74] [2019-09-10 02:19:57,503 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:19:57,503 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:19:57,533 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:19:57,533 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-09-10 02:19:57,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:57,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:19:57,534 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:19:57,534 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:19:57,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:57,552 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:19:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:57,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-10 02:19:57,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:19:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-09-10 02:19:57,635 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:19:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-10 02:19:57,742 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 02:19:57,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2019-09-10 02:19:57,743 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:19:57,743 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 02:19:57,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 02:19:57,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:19:57,744 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 6 states. [2019-09-10 02:19:57,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:57,836 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2019-09-10 02:19:57,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:19:57,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2019-09-10 02:19:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:57,843 INFO L225 Difference]: With dead ends: 74 [2019-09-10 02:19:57,844 INFO L226 Difference]: Without dead ends: 73 [2019-09-10 02:19:57,844 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:19:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-10 02:19:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-09-10 02:19:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-09-10 02:19:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2019-09-10 02:19:57,853 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 45 [2019-09-10 02:19:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:57,854 INFO L475 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2019-09-10 02:19:57,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 02:19:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2019-09-10 02:19:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-10 02:19:57,856 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:19:57,856 INFO L399 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:19:57,856 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:19:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:57,856 INFO L82 PathProgramCache]: Analyzing trace with hash 228915751, now seen corresponding path program 1 times [2019-09-10 02:19:57,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:19:57,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:57,858 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:57,858 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:19:57,858 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:19:57,862 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2019-09-10 02:19:57,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2019-09-10 02:19:57,863 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 [2019-09-10 02:19:57,889 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:57,890 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_NO_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: null) [2019-09-10 02:19:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:57,913 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 62 with the following transitions: [2019-09-10 02:19:57,913 INFO L207 CegarAbsIntRunner]: [0], [4], [13], [20], [29], [37], [39], [50], [53], [55], [58], [60], [61], [62], [63], [65], [66], [67], [68], [69], [70], [71], [72], [73], [74], [75], [76] [2019-09-10 02:19:57,919 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:19:57,919 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:19:57,941 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 02:19:57,942 INFO L272 AbstractInterpreter]: Visited 13 different actions 13 times. Never merged. Never widened. Performed 20 root evaluator evaluations with a maximum evaluation depth of 6. Performed 20 inverse root evaluator evaluations with a maximum inverse evaluation depth of 6. Never found a fixpoint. Largest state had 8 variables. [2019-09-10 02:19:57,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:19:57,942 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 02:19:57,942 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:19:57,942 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:19:57,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:19:57,970 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-10 02:19:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:19:57,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-10 02:19:57,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:19:58,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:19:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-10 02:19:58,069 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:19:58,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:19:58,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:19:58,198 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-09-10 02:19:58,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:19:58,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2019-09-10 02:19:58,202 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:19:58,202 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-10 02:19:58,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-10 02:19:58,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-09-10 02:19:58,203 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 13 states. [2019-09-10 02:19:58,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:19:58,375 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2019-09-10 02:19:58,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-10 02:19:58,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2019-09-10 02:19:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:19:58,377 INFO L225 Difference]: With dead ends: 75 [2019-09-10 02:19:58,377 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 02:19:58,377 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-09-10 02:19:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 02:19:58,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 02:19:58,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 02:19:58,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 02:19:58,378 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2019-09-10 02:19:58,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:19:58,379 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 02:19:58,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-10 02:19:58,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 02:19:58,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 02:19:58,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 02:19:58 BoogieIcfgContainer [2019-09-10 02:19:58,384 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 02:19:58,387 INFO L168 Benchmark]: Toolchain (without parser) took 3865.93 ms. Allocated memory was 135.3 MB in the beginning and 252.7 MB in the end (delta: 117.4 MB). Free memory was 91.2 MB in the beginning and 101.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 107.6 MB. Max. memory is 7.1 GB. [2019-09-10 02:19:58,388 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 135.3 MB. Free memory was 109.9 MB in the beginning and 109.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 02:19:58,389 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.29 ms. Allocated memory is still 135.3 MB. Free memory was 91.0 MB in the beginning and 81.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-09-10 02:19:58,390 INFO L168 Benchmark]: Boogie Preprocessor took 103.16 ms. Allocated memory was 135.3 MB in the beginning and 201.3 MB in the end (delta: 66.1 MB). Free memory was 81.3 MB in the beginning and 178.3 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-10 02:19:58,391 INFO L168 Benchmark]: RCFGBuilder took 240.75 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 165.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2019-09-10 02:19:58,391 INFO L168 Benchmark]: TraceAbstraction took 3286.42 ms. Allocated memory was 201.3 MB in the beginning and 252.7 MB in the end (delta: 51.4 MB). Free memory was 165.2 MB in the beginning and 101.0 MB in the end (delta: 64.2 MB). Peak memory consumption was 115.6 MB. Max. memory is 7.1 GB. [2019-09-10 02:19:58,395 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 135.3 MB. Free memory was 109.9 MB in the beginning and 109.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.29 ms. Allocated memory is still 135.3 MB. Free memory was 91.0 MB in the beginning and 81.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 103.16 ms. Allocated memory was 135.3 MB in the beginning and 201.3 MB in the end (delta: 66.1 MB). Free memory was 81.3 MB in the beginning and 178.3 MB in the end (delta: -97.1 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 240.75 ms. Allocated memory is still 201.3 MB. Free memory was 178.3 MB in the beginning and 165.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3286.42 ms. Allocated memory was 201.3 MB in the beginning and 252.7 MB in the end (delta: 51.4 MB). Free memory was 165.2 MB in the beginning and 101.0 MB in the end (delta: 64.2 MB). Peak memory consumption was 115.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 8 OverallIterations, 10 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 221 SDtfs, 110 SDslu, 526 SDs, 0 SdLazy, 382 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 453 GetRequests, 382 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 6 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 456 NumberOfCodeBlocks, 456 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 441 ConstructedInterpolants, 8 QuantifiedInterpolants, 46794 SizeOfPredicates, 25 NumberOfNonLiveVariables, 546 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 15 InterpolantComputations, 12 PerfectInterpolantSequences, 653/670 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...