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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:57:32,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:57:32,434 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:57:32,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 12:57:32,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:57:32,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:57:32,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:57:32,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:57:32,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:57:32,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:57:32,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:57:32,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:57:32,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:57:32,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:57:32,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:57:32,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:57:32,476 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:57:32,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:57:32,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:57:32,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:57:32,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-20 12:57:32,512 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:57:32,512 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:57:32,515 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:57:32,515 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:57:32,515 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:57:32,516 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:57:32,516 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:57:32,516 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:57:32,516 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:57:32,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:57:32,517 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:57:32,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:57:32,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:57:32,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:57:32,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:57:32,519 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:57:32,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:57:32,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:57:32,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:57:32,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:57:32,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:57:32,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:32,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:57:32,521 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:57:32,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:57:32,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:57:32,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:57:32,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:57:32,522 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:57:32,579 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:57:32,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:57:32,600 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:57:32,602 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:57:32,602 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:57:32,603 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2019-09-20 12:57:32,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ec32db9/aecd326a9e8b4c46bafb4cb88e933141/FLAG94dea9ebd [2019-09-20 12:57:33,082 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:57:33,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2019-09-20 12:57:33,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ec32db9/aecd326a9e8b4c46bafb4cb88e933141/FLAG94dea9ebd [2019-09-20 12:57:33,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8ec32db9/aecd326a9e8b4c46bafb4cb88e933141 [2019-09-20 12:57:33,513 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:57:33,514 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:57:33,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:33,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:57:33,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:57:33,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@add5982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33, skipping insertion in model container [2019-09-20 12:57:33,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,528 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:57:33,541 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:57:33,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:33,694 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:57:33,707 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:33,719 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:57:33,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33 WrapperNode [2019-09-20 12:57:33,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:33,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:57:33,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:57:33,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:57:33,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (1/1) ... [2019-09-20 12:57:33,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:57:33,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:57:33,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:57:33,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:57:33,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (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 [2019-09-20 12:57:33,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:57:33,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:57:33,910 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 12:57:33,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:57:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:57:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:57:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-20 12:57:33,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:57:33,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:57:33,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:57:34,085 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:57:34,086 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-20 12:57:34,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:34 BoogieIcfgContainer [2019-09-20 12:57:34,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:57:34,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:57:34,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:57:34,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:57:34,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:33" (1/3) ... [2019-09-20 12:57:34,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155d82d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:34, skipping insertion in model container [2019-09-20 12:57:34,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:33" (2/3) ... [2019-09-20 12:57:34,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@155d82d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:34, skipping insertion in model container [2019-09-20 12:57:34,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:34" (3/3) ... [2019-09-20 12:57:34,096 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2019-09-20 12:57:34,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:57:34,114 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 12:57:34,141 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 12:57:34,193 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:57:34,194 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:57:34,194 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:57:34,195 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:57:34,195 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:57:34,195 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:57:34,195 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:57:34,195 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:57:34,196 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:57:34,219 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-20 12:57:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:57:34,226 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:34,227 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:34,230 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -721501374, now seen corresponding path program 1 times [2019-09-20 12:57:34,238 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:34,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:34,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:34,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:34,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:34,374 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 12:57:34,378 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 12:57:34,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 12:57:34,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 12:57:34,392 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-20 12:57:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:34,412 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-20 12:57:34,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 12:57:34,413 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-20 12:57:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:34,419 INFO L225 Difference]: With dead ends: 30 [2019-09-20 12:57:34,420 INFO L226 Difference]: Without dead ends: 13 [2019-09-20 12:57:34,423 INFO L636 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 [2019-09-20 12:57:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-20 12:57:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-20 12:57:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-20 12:57:34,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-20 12:57:34,453 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-20 12:57:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:34,453 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-20 12:57:34,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 12:57:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-20 12:57:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-20 12:57:34,454 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:34,454 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:34,455 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:34,455 INFO L82 PathProgramCache]: Analyzing trace with hash -731660105, now seen corresponding path program 1 times [2019-09-20 12:57:34,456 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:34,456 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:34,457 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,458 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:34,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:34,561 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:34,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 12:57:34,563 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:57:34,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:57:34,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:34,564 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-20 12:57:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:34,612 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-20 12:57:34,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:57:34,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-20 12:57:34,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:34,614 INFO L225 Difference]: With dead ends: 21 [2019-09-20 12:57:34,615 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 12:57:34,616 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:57:34,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 12:57:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-20 12:57:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 12:57:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-20 12:57:34,621 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-20 12:57:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:34,621 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-20 12:57:34,621 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:57:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-20 12:57:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 12:57:34,622 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:34,622 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:34,623 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:34,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1637338477, now seen corresponding path program 1 times [2019-09-20 12:57:34,623 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:34,623 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:34,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:34,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:34,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:34,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:34,867 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:34,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:34,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-20 12:57:34,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:35,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:35,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:35,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-20 12:57:35,110 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-20 12:57:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-20 12:57:35,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-09-20 12:57:35,111 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 16 states. [2019-09-20 12:57:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:35,412 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2019-09-20 12:57:35,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-20 12:57:35,415 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2019-09-20 12:57:35,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:35,416 INFO L225 Difference]: With dead ends: 37 [2019-09-20 12:57:35,416 INFO L226 Difference]: Without dead ends: 22 [2019-09-20 12:57:35,418 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-09-20 12:57:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-20 12:57:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-09-20 12:57:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-20 12:57:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-20 12:57:35,423 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2019-09-20 12:57:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:35,424 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-20 12:57:35,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-20 12:57:35,424 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-20 12:57:35,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-20 12:57:35,425 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:35,426 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:35,426 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:35,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1350121109, now seen corresponding path program 1 times [2019-09-20 12:57:35,427 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:35,427 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:35,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:35,430 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:35,505 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:35,505 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-20 12:57:35,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-20 12:57:35,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:35,549 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:35,549 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-09-20 12:57:35,549 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 12:57:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 12:57:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:35,550 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 5 states. [2019-09-20 12:57:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:35,587 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-20 12:57:35,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:57:35,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-09-20 12:57:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:35,589 INFO L225 Difference]: With dead ends: 30 [2019-09-20 12:57:35,589 INFO L226 Difference]: Without dead ends: 22 [2019-09-20 12:57:35,590 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:35,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-20 12:57:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-20 12:57:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-20 12:57:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-09-20 12:57:35,595 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2019-09-20 12:57:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:35,596 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-09-20 12:57:35,596 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 12:57:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-09-20 12:57:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-20 12:57:35,597 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:35,597 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:35,597 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:35,598 INFO L82 PathProgramCache]: Analyzing trace with hash -424886253, now seen corresponding path program 2 times [2019-09-20 12:57:35,598 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:35,598 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:35,599 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:35,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-20 12:57:35,805 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:35,805 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:35,823 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:35,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:35,837 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:35,838 WARN L254 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-20 12:57:35,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:36,030 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 12:57:36,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,070 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:36,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2019-09-20 12:57:36,071 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-20 12:57:36,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-20 12:57:36,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-09-20 12:57:36,072 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2019-09-20 12:57:36,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:36,630 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-09-20 12:57:36,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-20 12:57:36,631 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 19 [2019-09-20 12:57:36,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:36,632 INFO L225 Difference]: With dead ends: 40 [2019-09-20 12:57:36,632 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 12:57:36,633 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2019-09-20 12:57:36,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 12:57:36,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-20 12:57:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:57:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-09-20 12:57:36,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2019-09-20 12:57:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:36,639 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-09-20 12:57:36,639 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-20 12:57:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-09-20 12:57:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-20 12:57:36,640 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:36,641 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:36,641 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1753373675, now seen corresponding path program 2 times [2019-09-20 12:57:36,642 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:36,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:36,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:36,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,758 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:36,758 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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) [2019-09-20 12:57:36,776 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:36,789 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-20 12:57:36,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:36,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-20 12:57:36,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,803 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:36,803 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-20 12:57:36,803 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:57:36,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:57:36,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:36,804 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 7 states. [2019-09-20 12:57:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:36,857 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2019-09-20 12:57:36,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 12:57:36,858 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-09-20 12:57:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:36,859 INFO L225 Difference]: With dead ends: 39 [2019-09-20 12:57:36,859 INFO L226 Difference]: Without dead ends: 31 [2019-09-20 12:57:36,860 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-20 12:57:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-20 12:57:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-20 12:57:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2019-09-20 12:57:36,870 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2019-09-20 12:57:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:36,871 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2019-09-20 12:57:36,871 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:57:36,871 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2019-09-20 12:57:36,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 12:57:36,872 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:36,872 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:36,872 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:36,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1094958777, now seen corresponding path program 3 times [2019-09-20 12:57:36,873 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:36,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:36,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:36,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:36,937 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-20 12:57:36,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:36,972 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-20 12:57:36,973 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:36,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-20 12:57:36,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:36,990 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:36,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-09-20 12:57:36,992 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 12:57:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 12:57:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:57:36,993 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2019-09-20 12:57:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,035 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-20 12:57:37,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 12:57:37,036 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-09-20 12:57:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,037 INFO L225 Difference]: With dead ends: 42 [2019-09-20 12:57:37,037 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 12:57:37,037 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-20 12:57:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 12:57:37,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-20 12:57:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-20 12:57:37,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-09-20 12:57:37,043 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 28 [2019-09-20 12:57:37,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,043 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-09-20 12:57:37,044 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 12:57:37,044 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-09-20 12:57:37,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-20 12:57:37,045 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,045 INFO L407 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,045 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash 98169237, now seen corresponding path program 4 times [2019-09-20 12:57:37,046 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,046 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,047 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:37,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,120 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:37,120 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-20 12:57:37,139 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-20 12:57:37,153 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-20 12:57:37,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:37,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-20 12:57:37,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:57:37,171 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:37,171 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-09-20 12:57:37,171 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:57:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:57:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:57:37,172 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 9 states. [2019-09-20 12:57:37,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,234 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2019-09-20 12:57:37,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:57:37,235 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-09-20 12:57:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,236 INFO L225 Difference]: With dead ends: 45 [2019-09-20 12:57:37,236 INFO L226 Difference]: Without dead ends: 37 [2019-09-20 12:57:37,237 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:57:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-20 12:57:37,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-09-20 12:57:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-20 12:57:37,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-20 12:57:37,249 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2019-09-20 12:57:37,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,250 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-20 12:57:37,250 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:57:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-20 12:57:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-20 12:57:37,251 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,253 INFO L407 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,253 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,254 INFO L82 PathProgramCache]: Analyzing trace with hash 144867641, now seen corresponding path program 5 times [2019-09-20 12:57:37,254 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,254 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,255 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,256 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:37,256 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,367 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:37,367 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:57:37,391 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-20 12:57:37,412 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-20 12:57:37,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:37,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-20 12:57:37,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:37,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-09-20 12:57:37,439 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-20 12:57:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-20 12:57:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:37,440 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 10 states. [2019-09-20 12:57:37,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,481 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-09-20 12:57:37,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-20 12:57:37,481 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-09-20 12:57:37,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,482 INFO L225 Difference]: With dead ends: 48 [2019-09-20 12:57:37,482 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 12:57:37,483 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:37,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 12:57:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-20 12:57:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-20 12:57:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-09-20 12:57:37,489 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2019-09-20 12:57:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,489 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-09-20 12:57:37,489 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-20 12:57:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-09-20 12:57:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-20 12:57:37,490 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,490 INFO L407 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,491 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,491 INFO L82 PathProgramCache]: Analyzing trace with hash -232382699, now seen corresponding path program 6 times [2019-09-20 12:57:37,491 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:37,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:37,597 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:37,597 INFO L224 ckRefinementStrategy]: Switched to mode Z3_FP 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 [2019-09-20 12:57:37,622 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-20 12:57:37,651 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-20 12:57:37,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-20 12:57:37,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-20 12:57:37,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:37,675 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-20 12:57:37,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:37,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2019-09-20 12:57:37,681 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 12:57:37,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 12:57:37,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:57:37,682 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 11 states. [2019-09-20 12:57:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:37,742 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2019-09-20 12:57:37,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-20 12:57:37,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-09-20 12:57:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:37,745 INFO L225 Difference]: With dead ends: 51 [2019-09-20 12:57:37,745 INFO L226 Difference]: Without dead ends: 43 [2019-09-20 12:57:37,746 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:57:37,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-20 12:57:37,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-20 12:57:37,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-20 12:57:37,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-09-20 12:57:37,753 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-09-20 12:57:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:37,754 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-09-20 12:57:37,754 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-20 12:57:37,754 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-09-20 12:57:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-20 12:57:37,756 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:37,756 INFO L407 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:37,756 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:37,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:37,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1032151993, now seen corresponding path program 7 times [2019-09-20 12:57:37,757 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:37,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:37,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-20 12:57:37,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 12:57:37,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-20 12:57:37,827 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-20 12:57:37,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 12:57:37 BoogieIcfgContainer [2019-09-20 12:57:37,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 12:57:37,856 INFO L168 Benchmark]: Toolchain (without parser) took 4341.38 ms. Allocated memory was 138.4 MB in the beginning and 267.4 MB in the end (delta: 129.0 MB). Free memory was 85.8 MB in the beginning and 236.5 MB in the end (delta: -150.7 MB). Peak memory consumption was 134.1 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:37,857 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 138.4 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 12:57:37,858 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.88 ms. Allocated memory is still 138.4 MB. Free memory was 85.4 MB in the beginning and 76.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:37,859 INFO L168 Benchmark]: Boogie Preprocessor took 123.79 ms. Allocated memory was 138.4 MB in the beginning and 198.7 MB in the end (delta: 60.3 MB). Free memory was 76.3 MB in the beginning and 176.6 MB in the end (delta: -100.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:37,859 INFO L168 Benchmark]: RCFGBuilder took 242.10 ms. Allocated memory is still 198.7 MB. Free memory was 176.6 MB in the beginning and 165.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:37,860 INFO L168 Benchmark]: TraceAbstraction took 3765.53 ms. Allocated memory was 198.7 MB in the beginning and 267.4 MB in the end (delta: 68.7 MB). Free memory was 164.5 MB in the beginning and 236.5 MB in the end (delta: -72.0 MB). Peak memory consumption was 152.5 MB. Max. memory is 7.1 GB. [2019-09-20 12:57:37,864 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 138.4 MB. Free memory was 104.3 MB in the beginning and 104.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 205.88 ms. Allocated memory is still 138.4 MB. Free memory was 85.4 MB in the beginning and 76.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.79 ms. Allocated memory was 138.4 MB in the beginning and 198.7 MB in the end (delta: 60.3 MB). Free memory was 76.3 MB in the beginning and 176.6 MB in the end (delta: -100.3 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 242.10 ms. Allocated memory is still 198.7 MB. Free memory was 176.6 MB in the beginning and 165.1 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3765.53 ms. Allocated memory was 198.7 MB in the beginning and 267.4 MB in the end (delta: 68.7 MB). Free memory was 164.5 MB in the beginning and 236.5 MB in the end (delta: -72.0 MB). Peak memory consumption was 152.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=0, n=10] [L13] COND TRUE i<=n VAL [i=1, n=10, n=0] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=1, n=2, n=10] [L13] i++ VAL [i=2, n=10, n=2] [L13] COND TRUE i<=n VAL [i=2, n=2, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=2, n=10, n=4] [L13] i++ VAL [i=3, n=10, n=4] [L13] COND TRUE i<=n VAL [i=3, n=4, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=3, n=6, n=10] [L13] i++ VAL [i=4, n=10, n=6] [L13] COND TRUE i<=n VAL [i=4, n=6, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=4, n=8, n=10] [L13] i++ VAL [i=5, n=10, n=8] [L13] COND TRUE i<=n VAL [i=5, n=8, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=5, n=10, n=10] [L13] i++ VAL [i=6, n=10, n=10] [L13] COND TRUE i<=n VAL [i=6, n=10, n=10] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=6, n=12, n=10] [L13] i++ VAL [i=7, n=12, n=10] [L13] COND TRUE i<=n VAL [i=7, n=10, n=12] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=7, n=14, n=10] [L13] i++ VAL [i=8, n=10, n=14] [L13] COND TRUE i<=n VAL [i=8, n=10, n=14] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=8, n=10, n=16] [L13] i++ VAL [i=9, n=16, n=10] [L13] COND TRUE i<=n VAL [i=9, n=10, n=16] [L14] COND TRUE i<10 [L15] sn = sn + (2) VAL [i=9, n=10, n=18] [L13] i++ VAL [i=10, n=10, n=18] [L13] COND TRUE i<=n VAL [i=10, n=10, n=18] [L14] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L13] i++ VAL [i=11, n=18, n=10] [L13] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. UNSAFE Result, 3.6s OverallTime, 11 OverallIterations, 10 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 114 SDtfs, 62 SDslu, 435 SDs, 0 SdLazy, 504 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 9 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 472 NumberOfCodeBlocks, 472 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 414 ConstructedInterpolants, 0 QuantifiedInterpolants, 29868 SizeOfPredicates, 12 NumberOfNonLiveVariables, 448 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 145/780 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...