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/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 12:57:53,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 12:57:53,190 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 12:57:53,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 12:57:53,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 12:57:53,214 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 12:57:53,215 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 12:57:53,216 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 12:57:53,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 12:57:53,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 12:57:53,220 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 12:57:53,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 12:57:53,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 12:57:53,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 12:57:53,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 12:57:53,227 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 12:57:53,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 12:57:53,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 12:57:53,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 12:57:53,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 12:57:53,240 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 12:57:53,263 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 12:57:53,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 12:57:53,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 12:57:53,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 12:57:53,265 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 12:57:53,265 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 12:57:53,265 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 12:57:53,266 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 12:57:53,266 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 12:57:53,266 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 12:57:53,266 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 12:57:53,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 12:57:53,267 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 12:57:53,267 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 12:57:53,267 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 12:57:53,267 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 12:57:53,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 12:57:53,268 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 12:57:53,268 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 12:57:53,268 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 12:57:53,268 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 12:57:53,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:53,269 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 12:57:53,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 12:57:53,269 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 12:57:53,269 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 12:57:53,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 12:57:53,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 12:57:53,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 12:57:53,299 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 12:57:53,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 12:57:53,318 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 12:57:53,319 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 12:57:53,320 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 12:57:53,321 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2019-09-20 12:57:53,388 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ce34173c/0bd51217e3a843508e7247807403ab30/FLAGf4a9159f7 [2019-09-20 12:57:53,842 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 12:57:53,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_4.i.v+nlh-reducer.c [2019-09-20 12:57:53,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ce34173c/0bd51217e3a843508e7247807403ab30/FLAGf4a9159f7 [2019-09-20 12:57:54,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ce34173c/0bd51217e3a843508e7247807403ab30 [2019-09-20 12:57:54,288 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 12:57:54,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 12:57:54,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:54,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 12:57:54,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 12:57:54,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b20aa1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54, skipping insertion in model container [2019-09-20 12:57:54,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,305 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 12:57:54,328 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 12:57:54,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:54,573 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 12:57:54,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 12:57:54,719 INFO L192 MainTranslator]: Completed translation [2019-09-20 12:57:54,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54 WrapperNode [2019-09-20 12:57:54,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 12:57:54,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 12:57:54,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 12:57:54,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 12:57:54,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... [2019-09-20 12:57:54,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 12:57:54,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 12:57:54,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 12:57:54,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 12:57:54,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 12:57:54,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 12:57:54,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 12:57:54,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 12:57:54,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 12:57:54,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 12:57:54,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 12:57:54,813 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-20 12:57:54,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 12:57:54,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 12:57:54,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 12:57:54,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 12:57:54,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 12:57:54,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 12:57:54,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 12:57:55,135 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 12:57:55,136 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-20 12:57:55,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:55 BoogieIcfgContainer [2019-09-20 12:57:55,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 12:57:55,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 12:57:55,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 12:57:55,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 12:57:55,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:57:54" (1/3) ... [2019-09-20 12:57:55,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7a6797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:55, skipping insertion in model container [2019-09-20 12:57:55,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:57:54" (2/3) ... [2019-09-20 12:57:55,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7a6797 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:57:55, skipping insertion in model container [2019-09-20 12:57:55,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:57:55" (3/3) ... [2019-09-20 12:57:55,146 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_4.i.v+nlh-reducer.c [2019-09-20 12:57:55,156 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 12:57:55,163 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-09-20 12:57:55,180 INFO L252 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-09-20 12:57:55,221 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 12:57:55,221 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 12:57:55,221 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 12:57:55,221 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 12:57:55,222 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 12:57:55,222 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 12:57:55,222 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 12:57:55,222 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 12:57:55,222 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 12:57:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-09-20 12:57:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 12:57:55,243 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:55,244 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:55,246 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1395858257, now seen corresponding path program 1 times [2019-09-20 12:57:55,253 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:55,253 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:55,304 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,304 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:55,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:55,450 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 12:57:55,453 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:55,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:55,457 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:55,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:55,472 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2019-09-20 12:57:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:55,521 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2019-09-20 12:57:55,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:55,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-20 12:57:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:55,536 INFO L225 Difference]: With dead ends: 51 [2019-09-20 12:57:55,536 INFO L226 Difference]: Without dead ends: 33 [2019-09-20 12:57:55,540 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 [2019-09-20 12:57:55,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-09-20 12:57:55,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2019-09-20 12:57:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-20 12:57:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-09-20 12:57:55,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2019-09-20 12:57:55,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:55,584 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-09-20 12:57:55,584 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:55,584 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-09-20 12:57:55,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 12:57:55,585 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:55,585 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:55,586 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:55,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1868760050, now seen corresponding path program 1 times [2019-09-20 12:57:55,589 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:55,589 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:55,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:55,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:55,704 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 12:57:55,704 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:55,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 12:57:55,706 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 12:57:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 12:57:55,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 12:57:55,707 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 4 states. [2019-09-20 12:57:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:55,765 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2019-09-20 12:57:55,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:57:55,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-09-20 12:57:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:55,767 INFO L225 Difference]: With dead ends: 51 [2019-09-20 12:57:55,767 INFO L226 Difference]: Without dead ends: 49 [2019-09-20 12:57:55,768 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-20 12:57:55,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-20 12:57:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2019-09-20 12:57:55,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-20 12:57:55,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2019-09-20 12:57:55,776 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 14 [2019-09-20 12:57:55,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:55,776 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2019-09-20 12:57:55,777 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 12:57:55,777 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2019-09-20 12:57:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-20 12:57:55,777 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:55,778 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:55,778 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:55,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1932482999, now seen corresponding path program 1 times [2019-09-20 12:57:55,779 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:55,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:55,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:55,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:55,826 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 12:57:55,829 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:55,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:55,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:55,831 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2019-09-20 12:57:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:55,879 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2019-09-20 12:57:55,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:55,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-20 12:57:55,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:55,881 INFO L225 Difference]: With dead ends: 60 [2019-09-20 12:57:55,881 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 12:57:55,882 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 [2019-09-20 12:57:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 12:57:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-09-20 12:57:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-20 12:57:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-20 12:57:55,889 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2019-09-20 12:57:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:55,889 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-20 12:57:55,889 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-20 12:57:55,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 12:57:55,890 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:55,890 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:55,891 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:55,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:55,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2140784762, now seen corresponding path program 1 times [2019-09-20 12:57:55,891 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:55,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:55,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:55,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:55,932 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 12:57:55,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:55,933 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 12:57:55,933 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 12:57:55,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 12:57:55,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 12:57:55,934 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2019-09-20 12:57:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:55,977 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2019-09-20 12:57:55,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 12:57:55,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-09-20 12:57:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:55,979 INFO L225 Difference]: With dead ends: 54 [2019-09-20 12:57:55,979 INFO L226 Difference]: Without dead ends: 34 [2019-09-20 12:57:55,980 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 [2019-09-20 12:57:55,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-20 12:57:55,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2019-09-20 12:57:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 12:57:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-09-20 12:57:55,985 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 15 [2019-09-20 12:57:55,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:55,986 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-09-20 12:57:55,986 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 12:57:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-09-20 12:57:55,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-09-20 12:57:55,987 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:55,987 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:55,987 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:55,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:55,988 INFO L82 PathProgramCache]: Analyzing trace with hash 341027121, now seen corresponding path program 1 times [2019-09-20 12:57:55,988 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:55,988 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:55,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:55,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:55,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:56,573 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2019-09-20 12:57:57,117 WARN L191 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 89 [2019-09-20 12:57:57,465 WARN L191 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 73 [2019-09-20 12:57:57,483 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 12:57:57,484 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:57,484 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-09-20 12:57:57,484 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-20 12:57:57,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-20 12:57:57,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-09-20 12:57:57,485 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 9 states. [2019-09-20 12:57:57,746 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2019-09-20 12:57:57,913 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2019-09-20 12:57:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:57,952 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-09-20 12:57:57,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-20 12:57:57,954 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-09-20 12:57:57,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:57,955 INFO L225 Difference]: With dead ends: 44 [2019-09-20 12:57:57,955 INFO L226 Difference]: Without dead ends: 29 [2019-09-20 12:57:57,956 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-09-20 12:57:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-20 12:57:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-20 12:57:57,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-20 12:57:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-09-20 12:57:57,962 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 20 [2019-09-20 12:57:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:57,963 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-09-20 12:57:57,963 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-20 12:57:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-09-20 12:57:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-09-20 12:57:57,964 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:57,964 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:57,964 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1330084180, now seen corresponding path program 1 times [2019-09-20 12:57:57,965 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:57,965 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:57,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:57,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:57,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:58,047 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 12:57:58,047 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 12:57:58,047 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-20 12:57:58,048 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-20 12:57:58,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-20 12:57:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-20 12:57:58,049 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 6 states. [2019-09-20 12:57:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:57:58,116 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2019-09-20 12:57:58,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-20 12:57:58,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-09-20 12:57:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:57:58,118 INFO L225 Difference]: With dead ends: 42 [2019-09-20 12:57:58,118 INFO L226 Difference]: Without dead ends: 40 [2019-09-20 12:57:58,118 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-09-20 12:57:58,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-20 12:57:58,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2019-09-20 12:57:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-20 12:57:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2019-09-20 12:57:58,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2019-09-20 12:57:58,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:57:58,124 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-09-20 12:57:58,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-20 12:57:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2019-09-20 12:57:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 12:57:58,125 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:57:58,126 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:57:58,126 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:57:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:57:58,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1309636523, now seen corresponding path program 1 times [2019-09-20 12:57:58,127 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:57:58,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:57:58,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:58,128 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:58,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:57:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:58,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:58,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:57:58,474 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 12:57:58,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:57:58,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:57:58,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-20 12:57:58,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:57:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:57:58,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:57:58,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2019-09-20 12:57:58,737 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 12:57:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 12:57:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:57:58,738 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 7 states. [2019-09-20 12:58:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 12:58:08,335 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2019-09-20 12:58:08,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-20 12:58:08,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2019-09-20 12:58:08,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 12:58:08,339 INFO L225 Difference]: With dead ends: 44 [2019-09-20 12:58:08,340 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 12:58:08,340 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-20 12:58:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 12:58:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-09-20 12:58:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-20 12:58:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2019-09-20 12:58:08,346 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 22 [2019-09-20 12:58:08,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 12:58:08,346 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2019-09-20 12:58:08,346 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 12:58:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2019-09-20 12:58:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-20 12:58:08,347 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 12:58:08,347 INFO L407 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 12:58:08,347 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 12:58:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 12:58:08,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1426055415, now seen corresponding path program 1 times [2019-09-20 12:58:08,348 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 12:58:08,348 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 12:58:08,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:08,350 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:08,350 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 12:58:08,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:09,454 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2019-09-20 12:58:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:11,958 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 12:58:11,958 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) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 12:58:11,989 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 12:58:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 12:58:12,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-20 12:58:12,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 12:58:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 12:58:16,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-20 12:58:16,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 11 [2019-09-20 12:58:16,554 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-20 12:58:16,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-20 12:58:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=81, Unknown=2, NotChecked=0, Total=110 [2019-09-20 12:58:16,556 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2019-09-20 12:58:29,394 WARN L191 SmtUtils]: Spent 4.84 s on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-09-20 12:58:34,220 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (div c_main_~main__index2~0 4294967296))) (let ((.cse0 (* 4294967296 .cse2)) (.cse1 (* 4294967296 (div c_main_~main__index1~0 4294967296)))) (and (<= c_main_~main__index2~0 (+ .cse0 2147483647)) (<= (+ .cse0 1) c_main_~main__index2~0) (<= c_main_~main__index1~0 (+ .cse1 99998)) (or (<= (+ .cse0 4294967295) c_main_~main__index2~0) (<= (+ (* 4294967296 (div (+ c_main_~main__index2~0 (* (- 4294967296) (div (+ c_main_~main__index1~0 (- 2)) 4294967296)) 4294867298) 4294967296)) c_main_~main__index1~0) (+ c_main_~main__index2~0 1))) (<= c_main_~main__index1~0 (+ .cse1 100000)) (<= c_main_~main__index2~0 (+ .cse0 99999)) (<= (+ (* 4294967296 (div (+ c_main_~main__index1~0 4294867296) 4294967296)) 1) c_main_~main__index1~0) (<= (+ (* 4294967296 (div (+ c_main_~main__index1~0 (* (- 1) c_main_~main__index2~0) .cse0 4294967294) 4294967296)) 2) c_main_~main__index1~0) (<= (+ (* 4294967296 (div (+ .cse1 c_main_~main__index2~0 (* (- 4294967296) .cse2) 4294867297) 4294967296)) 1) c_main_~main__index1~0)))) is different from false [2019-09-20 12:58:40,578 WARN L191 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 34 DAG size of output: 30