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_bug02.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-efa34d5 [2019-09-16 16:11:31,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-16 16:11:31,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-16 16:11:31,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-16 16:11:31,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-16 16:11:31,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-16 16:11:31,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-16 16:11:31,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-16 16:11:31,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-16 16:11:31,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-16 16:11:31,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-16 16:11:31,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-16 16:11:31,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-16 16:11:31,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-16 16:11:31,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-16 16:11:31,366 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-16 16:11:31,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-16 16:11:31,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-16 16:11:31,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-16 16:11:31,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-16 16:11:31,378 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 [2019-09-16 16:11:31,392 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-16 16:11:31,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-16 16:11:31,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-16 16:11:31,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-16 16:11:31,394 INFO L138 SettingsManager]: * Use SBE=true [2019-09-16 16:11:31,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-16 16:11:31,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-16 16:11:31,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-16 16:11:31,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-16 16:11:31,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-16 16:11:31,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-16 16:11:31,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-16 16:11:31,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-16 16:11:31,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-16 16:11:31,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-16 16:11:31,396 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-16 16:11:31,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-16 16:11:31,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-16 16:11:31,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-16 16:11:31,397 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-16 16:11:31,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-16 16:11:31,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-16 16:11:31,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-16 16:11:31,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-16 16:11:31,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-16 16:11:31,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-16 16:11:31,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-16 16:11:31,399 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-16 16:11:31,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-16 16:11:31,431 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-16 16:11:31,444 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-16 16:11:31,447 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-16 16:11:31,449 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-16 16:11:31,450 INFO L275 PluginConnector]: CDTParser initialized [2019-09-16 16:11:31,450 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02.i [2019-09-16 16:11:31,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967fb7f5b/26eb8ce1403c4c759a02a432da975312/FLAG600c893db [2019-09-16 16:11:32,003 INFO L306 CDTParser]: Found 1 translation units. [2019-09-16 16:11:32,004 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02.i [2019-09-16 16:11:32,010 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967fb7f5b/26eb8ce1403c4c759a02a432da975312/FLAG600c893db [2019-09-16 16:11:32,387 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/967fb7f5b/26eb8ce1403c4c759a02a432da975312 [2019-09-16 16:11:32,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-16 16:11:32,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-16 16:11:32,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:32,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-16 16:11:32,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-16 16:11:32,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b0106d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32, skipping insertion in model container [2019-09-16 16:11:32,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,415 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-16 16:11:32,429 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-16 16:11:32,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:32,595 INFO L188 MainTranslator]: Completed pre-run [2019-09-16 16:11:32,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-16 16:11:32,623 INFO L192 MainTranslator]: Completed translation [2019-09-16 16:11:32,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32 WrapperNode [2019-09-16 16:11:32,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-16 16:11:32,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-16 16:11:32,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-16 16:11:32,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-16 16:11:32,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (1/1) ... [2019-09-16 16:11:32,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-16 16:11:32,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-16 16:11:32,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-16 16:11:32,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-16 16:11:32,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (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 [2019-09-16 16:11:32,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-16 16:11:32,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-16 16:11:32,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-16 16:11:32,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-16 16:11:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-16 16:11:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-16 16:11:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-16 16:11:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-16 16:11:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-16 16:11:32,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-16 16:11:32,993 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-16 16:11:32,994 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-16 16:11:32,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:32 BoogieIcfgContainer [2019-09-16 16:11:32,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-16 16:11:32,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-16 16:11:32,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-16 16:11:32,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-16 16:11:33,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.09 04:11:32" (1/3) ... [2019-09-16 16:11:33,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527b57b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:33, skipping insertion in model container [2019-09-16 16:11:33,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.09 04:11:32" (2/3) ... [2019-09-16 16:11:33,002 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527b57b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.09 04:11:33, skipping insertion in model container [2019-09-16 16:11:33,002 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.09 04:11:32" (3/3) ... [2019-09-16 16:11:33,004 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2019-09-16 16:11:33,014 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-16 16:11:33,022 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-16 16:11:33,070 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-16 16:11:33,115 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-16 16:11:33,116 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-16 16:11:33,116 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-16 16:11:33,116 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-16 16:11:33,116 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-16 16:11:33,116 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-16 16:11:33,117 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-16 16:11:33,117 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-16 16:11:33,117 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-16 16:11:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-16 16:11:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 16:11:33,144 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:33,145 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:33,147 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:33,154 INFO L82 PathProgramCache]: Analyzing trace with hash -146959038, now seen corresponding path program 1 times [2019-09-16 16:11:33,156 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:33,156 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:33,211 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:33,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:33,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:33,282 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:33,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-16 16:11:33,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-16 16:11:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-16 16:11:33,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-16 16:11:33,302 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-09-16 16:11:33,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:33,327 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-09-16 16:11:33,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-16 16:11:33,328 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-16 16:11:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:33,337 INFO L225 Difference]: With dead ends: 31 [2019-09-16 16:11:33,337 INFO L226 Difference]: Without dead ends: 14 [2019-09-16 16:11:33,341 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 [2019-09-16 16:11:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-16 16:11:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-16 16:11:33,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-16 16:11:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-09-16 16:11:33,383 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2019-09-16 16:11:33,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:33,384 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-09-16 16:11:33,384 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-16 16:11:33,384 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-09-16 16:11:33,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-16 16:11:33,385 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:33,385 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:33,385 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:33,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:33,386 INFO L82 PathProgramCache]: Analyzing trace with hash -158964811, now seen corresponding path program 1 times [2019-09-16 16:11:33,386 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:33,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:33,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:33,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:33,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:33,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:33,521 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:33,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-16 16:11:33,522 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-16 16:11:33,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-16 16:11:33,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-16 16:11:33,524 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-09-16 16:11:33,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:33,594 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-16 16:11:33,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 16:11:33,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-16 16:11:33,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:33,596 INFO L225 Difference]: With dead ends: 23 [2019-09-16 16:11:33,596 INFO L226 Difference]: Without dead ends: 18 [2019-09-16 16:11:33,600 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 [2019-09-16 16:11:33,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-16 16:11:33,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-16 16:11:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-16 16:11:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-09-16 16:11:33,606 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2019-09-16 16:11:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:33,607 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-09-16 16:11:33,607 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-16 16:11:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-09-16 16:11:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-16 16:11:33,607 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:33,608 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:33,609 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1017948080, now seen corresponding path program 1 times [2019-09-16 16:11:33,610 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:33,610 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:33,611 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:33,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:33,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:33,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:33,880 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 [2019-09-16 16:11:33,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:33,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-16 16:11:33,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:34,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe [2019-09-16 16:11:34,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:34,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-16 16:11:34,152 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-16 16:11:34,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-16 16:11:34,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-09-16 16:11:34,154 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 16 states. [2019-09-16 16:11:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:34,482 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2019-09-16 16:11:34,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-16 16:11:34,483 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2019-09-16 16:11:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:34,486 INFO L225 Difference]: With dead ends: 40 [2019-09-16 16:11:34,486 INFO L226 Difference]: Without dead ends: 34 [2019-09-16 16:11:34,488 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2019-09-16 16:11:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-16 16:11:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-09-16 16:11:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-16 16:11:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-16 16:11:34,495 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2019-09-16 16:11:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:34,496 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-16 16:11:34,496 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-16 16:11:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-16 16:11:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-16 16:11:34,497 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:34,497 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:34,497 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:34,498 INFO L82 PathProgramCache]: Analyzing trace with hash -852639511, now seen corresponding path program 1 times [2019-09-16 16:11:34,498 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:34,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:34,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:34,500 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:34,500 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-16 16:11:34,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-16 16:11:34,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-16 16:11:34,527 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-16 16:11:34,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-16 16:11:34,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:11:34,528 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-09-16 16:11:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:34,552 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2019-09-16 16:11:34,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-16 16:11:34,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-09-16 16:11:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:34,554 INFO L225 Difference]: With dead ends: 36 [2019-09-16 16:11:34,554 INFO L226 Difference]: Without dead ends: 23 [2019-09-16 16:11:34,555 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-16 16:11:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-16 16:11:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-16 16:11:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-16 16:11:34,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-16 16:11:34,566 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2019-09-16 16:11:34,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:34,567 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-16 16:11:34,567 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-16 16:11:34,568 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-16 16:11:34,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-16 16:11:34,569 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:34,570 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:34,570 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1920151575, now seen corresponding path program 2 times [2019-09-16 16:11:34,571 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:34,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:34,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:34,575 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-16 16:11:34,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:34,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:34,654 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) [2019-09-16 16:11:34,676 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:34,693 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:11:34,694 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:34,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-16 16:11:34,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:34,747 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:34,748 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-16 16:11:34,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-16 16:11:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-16 16:11:34,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:11:34,749 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 8 states. [2019-09-16 16:11:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:34,813 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2019-09-16 16:11:34,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-16 16:11:34,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-09-16 16:11:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:34,816 INFO L225 Difference]: With dead ends: 32 [2019-09-16 16:11:34,816 INFO L226 Difference]: Without dead ends: 23 [2019-09-16 16:11:34,818 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-09-16 16:11:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-16 16:11:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-09-16 16:11:34,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-16 16:11:34,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-09-16 16:11:34,827 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 18 [2019-09-16 16:11:34,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:34,827 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-09-16 16:11:34,827 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-16 16:11:34,827 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-09-16 16:11:34,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 16:11:34,829 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:34,829 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:34,829 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:34,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1780946716, now seen corresponding path program 3 times [2019-09-16 16:11:34,830 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:34,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:34,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:34,833 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:34,833 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:34,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:34,916 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) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:34,936 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-16 16:11:34,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-16 16:11:34,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:34,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-16 16:11:34,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:35,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:35,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-16 16:11:35,016 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-16 16:11:35,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-16 16:11:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-09-16 16:11:35,017 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2019-09-16 16:11:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:35,076 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2019-09-16 16:11:35,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-16 16:11:35,077 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2019-09-16 16:11:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:35,078 INFO L225 Difference]: With dead ends: 34 [2019-09-16 16:11:35,078 INFO L226 Difference]: Without dead ends: 25 [2019-09-16 16:11:35,078 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2019-09-16 16:11:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-16 16:11:35,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-16 16:11:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-16 16:11:35,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-16 16:11:35,083 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 22 [2019-09-16 16:11:35,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:35,084 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-16 16:11:35,084 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-16 16:11:35,084 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-16 16:11:35,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-16 16:11:35,085 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:35,085 INFO L407 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:35,085 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:35,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:35,086 INFO L82 PathProgramCache]: Analyzing trace with hash -971600090, now seen corresponding path program 2 times [2019-09-16 16:11:35,086 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:35,086 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:35,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,087 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:35,087 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:35,324 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-16 16:11:35,325 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:35,325 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:35,346 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-16 16:11:35,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-16 16:11:35,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:35,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-16 16:11:35,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:35,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-16 16:11:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:35,582 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:35,582 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2019-09-16 16:11:35,583 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-16 16:11:35,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-16 16:11:35,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2019-09-16 16:11:35,584 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 21 states. [2019-09-16 16:11:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:36,056 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-16 16:11:36,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-16 16:11:36,057 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-09-16 16:11:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:36,058 INFO L225 Difference]: With dead ends: 42 [2019-09-16 16:11:36,058 INFO L226 Difference]: Without dead ends: 36 [2019-09-16 16:11:36,059 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2019-09-16 16:11:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-16 16:11:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2019-09-16 16:11:36,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-16 16:11:36,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-09-16 16:11:36,065 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2019-09-16 16:11:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:36,065 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-09-16 16:11:36,065 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-16 16:11:36,066 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-09-16 16:11:36,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-16 16:11:36,066 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:36,067 INFO L407 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:36,067 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:36,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:36,067 INFO L82 PathProgramCache]: Analyzing trace with hash -131462049, now seen corresponding path program 4 times [2019-09-16 16:11:36,067 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:36,068 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:36,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,069 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:36,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:36,132 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:36,133 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-16 16:11:36,156 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-16 16:11:36,169 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-16 16:11:36,170 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:36,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-16 16:11:36,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:36,280 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:36,280 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-16 16:11:36,281 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-16 16:11:36,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-16 16:11:36,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-09-16 16:11:36,281 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 16 states. [2019-09-16 16:11:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:36,364 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2019-09-16 16:11:36,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-16 16:11:36,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-09-16 16:11:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:36,365 INFO L225 Difference]: With dead ends: 42 [2019-09-16 16:11:36,365 INFO L226 Difference]: Without dead ends: 33 [2019-09-16 16:11:36,366 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2019-09-16 16:11:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-16 16:11:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-09-16 16:11:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-16 16:11:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-09-16 16:11:36,374 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 26 [2019-09-16 16:11:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:36,375 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-09-16 16:11:36,375 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-16 16:11:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-09-16 16:11:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-16 16:11:36,377 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:36,377 INFO L407 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:36,377 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:36,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:36,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1107887526, now seen corresponding path program 5 times [2019-09-16 16:11:36,378 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:36,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:36,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,379 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:36,380 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-16 16:11:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:36,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-16 16:11:36,488 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 [2019-09-16 16:11:36,510 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-16 16:11:36,528 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-16 16:11:36,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-16 16:11:36,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-16 16:11:36,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-16 16:11:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-16 16:11:36,637 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-16 16:11:36,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2019-09-16 16:11:36,638 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-16 16:11:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-16 16:11:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-09-16 16:11:36,639 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 20 states. [2019-09-16 16:11:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-16 16:11:36,827 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2019-09-16 16:11:36,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-16 16:11:36,828 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2019-09-16 16:11:36,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-16 16:11:36,829 INFO L225 Difference]: With dead ends: 47 [2019-09-16 16:11:36,829 INFO L226 Difference]: Without dead ends: 38 [2019-09-16 16:11:36,830 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2019-09-16 16:11:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-09-16 16:11:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2019-09-16 16:11:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-09-16 16:11:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2019-09-16 16:11:36,836 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2019-09-16 16:11:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-16 16:11:36,836 INFO L475 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2019-09-16 16:11:36,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-16 16:11:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2019-09-16 16:11:36,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-16 16:11:36,837 INFO L399 BasicCegarLoop]: Found error trace [2019-09-16 16:11:36,838 INFO L407 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-16 16:11:36,838 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-16 16:11:36,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-16 16:11:36,838 INFO L82 PathProgramCache]: Analyzing trace with hash -682200363, now seen corresponding path program 6 times [2019-09-16 16:11:36,839 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-16 16:11:36,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-16 16:11:36,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,841 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-16 16:11:36,842 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-16 16:11:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 16:11:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-16 16:11:36,925 INFO L474 BasicCegarLoop]: Counterexample might be feasible [2019-09-16 16:11:36,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.09 04:11:36 BoogieIcfgContainer [2019-09-16 16:11:36,958 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-16 16:11:36,961 INFO L168 Benchmark]: Toolchain (without parser) took 4561.83 ms. Allocated memory was 131.1 MB in the beginning and 265.8 MB in the end (delta: 134.7 MB). Free memory was 85.2 MB in the beginning and 80.9 MB in the end (delta: 4.4 MB). Peak memory consumption was 139.1 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:36,962 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 131.1 MB. Free memory was 103.9 MB in the beginning and 103.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-16 16:11:36,963 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.04 ms. Allocated memory is still 131.1 MB. Free memory was 85.0 MB in the beginning and 75.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:36,964 INFO L168 Benchmark]: Boogie Preprocessor took 124.90 ms. Allocated memory was 131.1 MB in the beginning and 198.7 MB in the end (delta: 67.6 MB). Free memory was 75.7 MB in the beginning and 175.1 MB in the end (delta: -99.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:36,965 INFO L168 Benchmark]: RCFGBuilder took 245.66 ms. Allocated memory is still 198.7 MB. Free memory was 175.1 MB in the beginning and 163.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:36,965 INFO L168 Benchmark]: TraceAbstraction took 3962.27 ms. Allocated memory was 198.7 MB in the beginning and 265.8 MB in the end (delta: 67.1 MB). Free memory was 163.3 MB in the beginning and 80.9 MB in the end (delta: 82.5 MB). Peak memory consumption was 149.6 MB. Max. memory is 7.1 GB. [2019-09-16 16:11:36,975 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 131.1 MB. Free memory was 103.9 MB in the beginning and 103.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 225.04 ms. Allocated memory is still 131.1 MB. Free memory was 85.0 MB in the beginning and 75.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.90 ms. Allocated memory was 131.1 MB in the beginning and 198.7 MB in the end (delta: 67.6 MB). Free memory was 75.7 MB in the beginning and 175.1 MB in the end (delta: -99.3 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.66 ms. Allocated memory is still 198.7 MB. Free memory was 175.1 MB in the beginning and 163.3 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3962.27 ms. Allocated memory was 198.7 MB in the beginning and 265.8 MB in the end (delta: 67.1 MB). Free memory was 163.3 MB in the beginning and 80.9 MB in the end (delta: 82.5 MB). Peak memory consumption was 149.6 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, j=10, n=0, n=6] [L13] COND TRUE i<=n VAL [i=1, j=10, n=0, n=6] [L14] COND TRUE i