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/psyco/psyco_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:41:47,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:41:47,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:41:47,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:41:47,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:41:47,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:41:47,256 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:41:47,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:41:47,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:41:47,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:41:47,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:41:47,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:41:47,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:41:47,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:41:47,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:41:47,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:41:47,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:41:47,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:41:47,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:41:47,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:41:47,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:41:47,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:41:47,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:41:47,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:41:47,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:41:47,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:41:47,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:41:47,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:41:47,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:41:47,289 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:41:47,290 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:41:47,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:41:47,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:41:47,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:41:47,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:41:47,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:41:47,296 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 [2019-10-14 23:41:47,313 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:41:47,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:41:47,314 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:41:47,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:41:47,315 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:41:47,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:41:47,315 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:41:47,316 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:41:47,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:41:47,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:41:47,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:41:47,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:41:47,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:41:47,317 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:41:47,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:41:47,317 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:41:47,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:41:47,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:41:47,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:41:47,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:41:47,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:41:47,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:41:47,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:41:47,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:41:47,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:41:47,319 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:41:47,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:41:47,319 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:41:47,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:41:47,600 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:41:47,613 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:41:47,617 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:41:47,619 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:41:47,619 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:41:47,620 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-10-14 23:41:47,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b555085/30d88c0ff19442cf96bbd4a52a0c899c/FLAG85a8758f6 [2019-10-14 23:41:48,161 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:41:48,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-10-14 23:41:48,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b555085/30d88c0ff19442cf96bbd4a52a0c899c/FLAG85a8758f6 [2019-10-14 23:41:48,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6b555085/30d88c0ff19442cf96bbd4a52a0c899c [2019-10-14 23:41:48,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:41:48,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:41:48,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:41:48,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:41:48,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:41:48,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:41:48" (1/1) ... [2019-10-14 23:41:48,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c6d0cef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:48, skipping insertion in model container [2019-10-14 23:41:48,497 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:41:48" (1/1) ... [2019-10-14 23:41:48,504 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:41:48,560 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:41:48,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:41:48,868 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:41:49,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:41:49,049 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:41:49,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49 WrapperNode [2019-10-14 23:41:49,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:41:49,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:41:49,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:41:49,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:41:49,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (1/1) ... [2019-10-14 23:41:49,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (1/1) ... [2019-10-14 23:41:49,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (1/1) ... [2019-10-14 23:41:49,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (1/1) ... [2019-10-14 23:41:49,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (1/1) ... [2019-10-14 23:41:49,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (1/1) ... [2019-10-14 23:41:49,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (1/1) ... [2019-10-14 23:41:49,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:41:49,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:41:49,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:41:49,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:41:49,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (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 [2019-10-14 23:41:49,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:41:49,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:41:49,208 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:41:49,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:41:49,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:41:49,209 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:41:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:41:49,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:41:50,097 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:41:50,097 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 23:41:50,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:41:50 BoogieIcfgContainer [2019-10-14 23:41:50,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:41:50,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:41:50,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:41:50,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:41:50,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:41:48" (1/3) ... [2019-10-14 23:41:50,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719aae52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:41:50, skipping insertion in model container [2019-10-14 23:41:50,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:41:49" (2/3) ... [2019-10-14 23:41:50,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719aae52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:41:50, skipping insertion in model container [2019-10-14 23:41:50,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:41:50" (3/3) ... [2019-10-14 23:41:50,108 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2019-10-14 23:41:50,116 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:41:50,123 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:41:50,135 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:41:50,168 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:41:50,169 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:41:50,169 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:41:50,170 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:41:50,170 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:41:50,170 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:41:50,170 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:41:50,170 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:41:50,197 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2019-10-14 23:41:50,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:41:50,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:50,203 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:50,204 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:50,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:50,209 INFO L82 PathProgramCache]: Analyzing trace with hash 919157391, now seen corresponding path program 1 times [2019-10-14 23:41:50,217 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:50,217 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555146847] [2019-10-14 23:41:50,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:50,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:50,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:50,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555146847] [2019-10-14 23:41:50,468 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:41:50,468 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:41:50,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36932081] [2019-10-14 23:41:50,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:41:50,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:50,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:41:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:41:50,491 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 4 states. [2019-10-14 23:41:51,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:51,221 INFO L93 Difference]: Finished difference Result 331 states and 635 transitions. [2019-10-14 23:41:51,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:41:51,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 23:41:51,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:51,237 INFO L225 Difference]: With dead ends: 331 [2019-10-14 23:41:51,237 INFO L226 Difference]: Without dead ends: 206 [2019-10-14 23:41:51,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-10-14 23:41:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 182. [2019-10-14 23:41:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-10-14 23:41:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 314 transitions. [2019-10-14 23:41:51,331 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 314 transitions. Word has length 14 [2019-10-14 23:41:51,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:51,332 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 314 transitions. [2019-10-14 23:41:51,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:41:51,333 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 314 transitions. [2019-10-14 23:41:51,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:41:51,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:51,335 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:51,336 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:51,338 INFO L82 PathProgramCache]: Analyzing trace with hash 736602936, now seen corresponding path program 1 times [2019-10-14 23:41:51,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:51,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711422264] [2019-10-14 23:41:51,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:51,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:51,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:51,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711422264] [2019-10-14 23:41:51,442 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:41:51,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:41:51,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859696667] [2019-10-14 23:41:51,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:41:51,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:41:51,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:41:51,447 INFO L87 Difference]: Start difference. First operand 182 states and 314 transitions. Second operand 4 states. [2019-10-14 23:41:51,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:51,841 INFO L93 Difference]: Finished difference Result 365 states and 632 transitions. [2019-10-14 23:41:51,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:41:51,842 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 23:41:51,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:51,844 INFO L225 Difference]: With dead ends: 365 [2019-10-14 23:41:51,847 INFO L226 Difference]: Without dead ends: 189 [2019-10-14 23:41:51,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-10-14 23:41:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2019-10-14 23:41:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-10-14 23:41:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 322 transitions. [2019-10-14 23:41:51,878 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 322 transitions. Word has length 15 [2019-10-14 23:41:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:51,879 INFO L462 AbstractCegarLoop]: Abstraction has 189 states and 322 transitions. [2019-10-14 23:41:51,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:41:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 322 transitions. [2019-10-14 23:41:51,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:41:51,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:51,882 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:51,882 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:51,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:51,883 INFO L82 PathProgramCache]: Analyzing trace with hash 816788357, now seen corresponding path program 1 times [2019-10-14 23:41:51,883 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:51,883 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846331720] [2019-10-14 23:41:51,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:51,883 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:51,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:52,248 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2019-10-14 23:41:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:52,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:52,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846331720] [2019-10-14 23:41:52,281 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:41:52,281 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:41:52,281 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946389273] [2019-10-14 23:41:52,282 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:41:52,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:52,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:41:52,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:52,283 INFO L87 Difference]: Start difference. First operand 189 states and 322 transitions. Second operand 5 states. [2019-10-14 23:41:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:52,894 INFO L93 Difference]: Finished difference Result 292 states and 485 transitions. [2019-10-14 23:41:52,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:41:52,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-14 23:41:52,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:52,897 INFO L225 Difference]: With dead ends: 292 [2019-10-14 23:41:52,897 INFO L226 Difference]: Without dead ends: 276 [2019-10-14 23:41:52,898 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:41:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2019-10-14 23:41:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 259. [2019-10-14 23:41:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-10-14 23:41:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 436 transitions. [2019-10-14 23:41:52,913 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 436 transitions. Word has length 21 [2019-10-14 23:41:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:52,913 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 436 transitions. [2019-10-14 23:41:52,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:41:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 436 transitions. [2019-10-14 23:41:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:41:52,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:52,915 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:52,915 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1993084704, now seen corresponding path program 1 times [2019-10-14 23:41:52,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:52,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232325110] [2019-10-14 23:41:52,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:52,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:52,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:53,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232325110] [2019-10-14 23:41:53,010 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:41:53,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:41:53,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127746110] [2019-10-14 23:41:53,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:41:53,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:53,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:41:53,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:41:53,012 INFO L87 Difference]: Start difference. First operand 259 states and 436 transitions. Second operand 4 states. [2019-10-14 23:41:53,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:53,261 INFO L93 Difference]: Finished difference Result 468 states and 791 transitions. [2019-10-14 23:41:53,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:41:53,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 23:41:53,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:53,264 INFO L225 Difference]: With dead ends: 468 [2019-10-14 23:41:53,264 INFO L226 Difference]: Without dead ends: 216 [2019-10-14 23:41:53,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-10-14 23:41:53,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2019-10-14 23:41:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-10-14 23:41:53,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 355 transitions. [2019-10-14 23:41:53,276 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 355 transitions. Word has length 22 [2019-10-14 23:41:53,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:53,276 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 355 transitions. [2019-10-14 23:41:53,277 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:41:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 355 transitions. [2019-10-14 23:41:53,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:41:53,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:53,279 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:53,279 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:53,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:53,279 INFO L82 PathProgramCache]: Analyzing trace with hash -365898165, now seen corresponding path program 1 times [2019-10-14 23:41:53,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:53,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48446386] [2019-10-14 23:41:53,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:53,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:53,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:53,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48446386] [2019-10-14 23:41:53,353 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429439030] [2019-10-14 23:41:53,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:41:53,425 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:41:53,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:41:53,464 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:41:53,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 23:41:53,465 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519266178] [2019-10-14 23:41:53,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:41:53,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:53,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:41:53,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:41:53,466 INFO L87 Difference]: Start difference. First operand 214 states and 355 transitions. Second operand 3 states. [2019-10-14 23:41:53,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:53,511 INFO L93 Difference]: Finished difference Result 389 states and 646 transitions. [2019-10-14 23:41:53,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:41:53,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-14 23:41:53,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:53,513 INFO L225 Difference]: With dead ends: 389 [2019-10-14 23:41:53,514 INFO L226 Difference]: Without dead ends: 182 [2019-10-14 23:41:53,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:41:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-14 23:41:53,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2019-10-14 23:41:53,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-10-14 23:41:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 291 transitions. [2019-10-14 23:41:53,532 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 291 transitions. Word has length 28 [2019-10-14 23:41:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:53,532 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 291 transitions. [2019-10-14 23:41:53,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:41:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 291 transitions. [2019-10-14 23:41:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:41:53,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:53,539 INFO L380 BasicCegarLoop]: trace histogram [3, 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] [2019-10-14 23:41:53,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:53,746 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1624798356, now seen corresponding path program 1 times [2019-10-14 23:41:53,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:53,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391110124] [2019-10-14 23:41:53,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:53,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:53,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:53,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391110124] [2019-10-14 23:41:53,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551367788] [2019-10-14 23:41:53,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:53,915 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:41:53,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:41:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:53,940 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:41:53,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-10-14 23:41:53,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529092082] [2019-10-14 23:41:53,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:41:53,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:53,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:41:53,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:53,943 INFO L87 Difference]: Start difference. First operand 180 states and 291 transitions. Second operand 5 states. [2019-10-14 23:41:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:54,531 INFO L93 Difference]: Finished difference Result 435 states and 706 transitions. [2019-10-14 23:41:54,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:41:54,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-10-14 23:41:54,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:54,534 INFO L225 Difference]: With dead ends: 435 [2019-10-14 23:41:54,534 INFO L226 Difference]: Without dead ends: 282 [2019-10-14 23:41:54,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:41:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2019-10-14 23:41:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2019-10-14 23:41:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2019-10-14 23:41:54,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 408 transitions. [2019-10-14 23:41:54,545 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 408 transitions. Word has length 30 [2019-10-14 23:41:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:54,546 INFO L462 AbstractCegarLoop]: Abstraction has 245 states and 408 transitions. [2019-10-14 23:41:54,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:41:54,546 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 408 transitions. [2019-10-14 23:41:54,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:41:54,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:54,547 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:54,750 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:54,751 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash -944739986, now seen corresponding path program 1 times [2019-10-14 23:41:54,751 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:54,751 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349076123] [2019-10-14 23:41:54,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:54,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:54,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:54,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349076123] [2019-10-14 23:41:54,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504125232] [2019-10-14 23:41:54,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:54,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:41:54,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:41:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:54,908 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:41:54,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:41:54,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847190117] [2019-10-14 23:41:54,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:41:54,910 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:54,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:41:54,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:41:54,910 INFO L87 Difference]: Start difference. First operand 245 states and 408 transitions. Second operand 6 states. [2019-10-14 23:41:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:55,596 INFO L93 Difference]: Finished difference Result 464 states and 780 transitions. [2019-10-14 23:41:55,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:41:55,597 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-14 23:41:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:55,600 INFO L225 Difference]: With dead ends: 464 [2019-10-14 23:41:55,600 INFO L226 Difference]: Without dead ends: 452 [2019-10-14 23:41:55,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:41:55,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2019-10-14 23:41:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2019-10-14 23:41:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2019-10-14 23:41:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 730 transitions. [2019-10-14 23:41:55,617 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 730 transitions. Word has length 30 [2019-10-14 23:41:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:55,617 INFO L462 AbstractCegarLoop]: Abstraction has 438 states and 730 transitions. [2019-10-14 23:41:55,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:41:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 730 transitions. [2019-10-14 23:41:55,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:41:55,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:55,619 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:55,830 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:55,830 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:55,831 INFO L82 PathProgramCache]: Analyzing trace with hash 789275061, now seen corresponding path program 1 times [2019-10-14 23:41:55,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:55,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085504088] [2019-10-14 23:41:55,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:55,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:55,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:55,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085504088] [2019-10-14 23:41:55,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97502054] [2019-10-14 23:41:55,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:56,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:41:56,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:41:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:56,063 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:41:56,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 7 [2019-10-14 23:41:56,063 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066565792] [2019-10-14 23:41:56,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:41:56,064 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:56,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:41:56,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:41:56,065 INFO L87 Difference]: Start difference. First operand 438 states and 730 transitions. Second operand 7 states. [2019-10-14 23:41:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:56,852 INFO L93 Difference]: Finished difference Result 495 states and 817 transitions. [2019-10-14 23:41:56,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:41:56,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 23:41:56,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:56,857 INFO L225 Difference]: With dead ends: 495 [2019-10-14 23:41:56,858 INFO L226 Difference]: Without dead ends: 490 [2019-10-14 23:41:56,858 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:41:56,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2019-10-14 23:41:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 484. [2019-10-14 23:41:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2019-10-14 23:41:56,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 802 transitions. [2019-10-14 23:41:56,878 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 802 transitions. Word has length 31 [2019-10-14 23:41:56,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:56,879 INFO L462 AbstractCegarLoop]: Abstraction has 484 states and 802 transitions. [2019-10-14 23:41:56,879 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:41:56,879 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 802 transitions. [2019-10-14 23:41:56,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:41:56,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:56,880 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:41:57,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:57,084 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:57,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:57,085 INFO L82 PathProgramCache]: Analyzing trace with hash 2038890699, now seen corresponding path program 1 times [2019-10-14 23:41:57,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:57,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312588309] [2019-10-14 23:41:57,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:57,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:57,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:41:57,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312588309] [2019-10-14 23:41:57,134 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:41:57,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:41:57,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909917477] [2019-10-14 23:41:57,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:41:57,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:41:57,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:41:57,137 INFO L87 Difference]: Start difference. First operand 484 states and 802 transitions. Second operand 4 states. [2019-10-14 23:41:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:57,386 INFO L93 Difference]: Finished difference Result 949 states and 1566 transitions. [2019-10-14 23:41:57,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:41:57,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-14 23:41:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:57,390 INFO L225 Difference]: With dead ends: 949 [2019-10-14 23:41:57,390 INFO L226 Difference]: Without dead ends: 495 [2019-10-14 23:41:57,392 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:57,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-10-14 23:41:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2019-10-14 23:41:57,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2019-10-14 23:41:57,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 794 transitions. [2019-10-14 23:41:57,414 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 794 transitions. Word has length 32 [2019-10-14 23:41:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:57,415 INFO L462 AbstractCegarLoop]: Abstraction has 493 states and 794 transitions. [2019-10-14 23:41:57,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:41:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 794 transitions. [2019-10-14 23:41:57,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:41:57,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:57,417 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2019-10-14 23:41:57,417 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash 820851006, now seen corresponding path program 1 times [2019-10-14 23:41:57,417 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:57,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076536262] [2019-10-14 23:41:57,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:57,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:57,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:57,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:41:57,495 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076536262] [2019-10-14 23:41:57,495 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:41:57,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:41:57,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124489732] [2019-10-14 23:41:57,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:41:57,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:41:57,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:41:57,496 INFO L87 Difference]: Start difference. First operand 493 states and 794 transitions. Second operand 4 states. [2019-10-14 23:41:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:57,657 INFO L93 Difference]: Finished difference Result 939 states and 1525 transitions. [2019-10-14 23:41:57,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:41:57,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2019-10-14 23:41:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:57,660 INFO L225 Difference]: With dead ends: 939 [2019-10-14 23:41:57,660 INFO L226 Difference]: Without dead ends: 495 [2019-10-14 23:41:57,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-10-14 23:41:57,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 493. [2019-10-14 23:41:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2019-10-14 23:41:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 788 transitions. [2019-10-14 23:41:57,678 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 788 transitions. Word has length 40 [2019-10-14 23:41:57,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:57,678 INFO L462 AbstractCegarLoop]: Abstraction has 493 states and 788 transitions. [2019-10-14 23:41:57,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:41:57,678 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 788 transitions. [2019-10-14 23:41:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:41:57,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:57,679 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1] [2019-10-14 23:41:57,680 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:57,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:57,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1867136664, now seen corresponding path program 1 times [2019-10-14 23:41:57,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:57,680 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675300173] [2019-10-14 23:41:57,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:57,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:57,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:41:57,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675300173] [2019-10-14 23:41:57,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067286867] [2019-10-14 23:41:57,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:57,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:57,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:41:57,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:41:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:41:58,016 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:41:58,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-14 23:41:58,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096691673] [2019-10-14 23:41:58,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:41:58,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:41:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:41:58,017 INFO L87 Difference]: Start difference. First operand 493 states and 788 transitions. Second operand 9 states. [2019-10-14 23:41:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:41:59,260 INFO L93 Difference]: Finished difference Result 1034 states and 1641 transitions. [2019-10-14 23:41:59,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:41:59,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-10-14 23:41:59,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:41:59,268 INFO L225 Difference]: With dead ends: 1034 [2019-10-14 23:41:59,268 INFO L226 Difference]: Without dead ends: 583 [2019-10-14 23:41:59,270 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:41:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2019-10-14 23:41:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 544. [2019-10-14 23:41:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-10-14 23:41:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 867 transitions. [2019-10-14 23:41:59,294 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 867 transitions. Word has length 41 [2019-10-14 23:41:59,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:41:59,294 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 867 transitions. [2019-10-14 23:41:59,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:41:59,295 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 867 transitions. [2019-10-14 23:41:59,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:41:59,296 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:41:59,296 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1] [2019-10-14 23:41:59,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:59,501 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:41:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:41:59,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2035215205, now seen corresponding path program 1 times [2019-10-14 23:41:59,501 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:41:59,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381648646] [2019-10-14 23:41:59,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:59,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:41:59,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:41:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:41:59,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381648646] [2019-10-14 23:41:59,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120797511] [2019-10-14 23:41:59,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:41:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:41:59,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:41:59,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:41:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:41:59,707 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:41:59,707 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2019-10-14 23:41:59,707 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881832613] [2019-10-14 23:41:59,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:41:59,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:41:59,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:41:59,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:41:59,708 INFO L87 Difference]: Start difference. First operand 544 states and 867 transitions. Second operand 5 states. [2019-10-14 23:42:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:00,245 INFO L93 Difference]: Finished difference Result 558 states and 879 transitions. [2019-10-14 23:42:00,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:00,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-14 23:42:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:00,249 INFO L225 Difference]: With dead ends: 558 [2019-10-14 23:42:00,249 INFO L226 Difference]: Without dead ends: 546 [2019-10-14 23:42:00,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:00,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2019-10-14 23:42:00,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2019-10-14 23:42:00,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-10-14 23:42:00,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 841 transitions. [2019-10-14 23:42:00,266 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 841 transitions. Word has length 42 [2019-10-14 23:42:00,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:00,266 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 841 transitions. [2019-10-14 23:42:00,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:00,267 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 841 transitions. [2019-10-14 23:42:00,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:42:00,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:00,268 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:00,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:00,480 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1265387988, now seen corresponding path program 1 times [2019-10-14 23:42:00,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:00,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860948965] [2019-10-14 23:42:00,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:00,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:00,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:00,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860948965] [2019-10-14 23:42:00,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525048957] [2019-10-14 23:42:00,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:00,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:42:00,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:00,836 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:00,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:00,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-14 23:42:00,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983273947] [2019-10-14 23:42:00,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:00,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:00,838 INFO L87 Difference]: Start difference. First operand 544 states and 841 transitions. Second operand 6 states. [2019-10-14 23:42:01,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:01,680 INFO L93 Difference]: Finished difference Result 553 states and 848 transitions. [2019-10-14 23:42:01,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:01,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-10-14 23:42:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:01,683 INFO L225 Difference]: With dead ends: 553 [2019-10-14 23:42:01,684 INFO L226 Difference]: Without dead ends: 551 [2019-10-14 23:42:01,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:01,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2019-10-14 23:42:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 545. [2019-10-14 23:42:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-10-14 23:42:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 842 transitions. [2019-10-14 23:42:01,700 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 842 transitions. Word has length 44 [2019-10-14 23:42:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:01,701 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 842 transitions. [2019-10-14 23:42:01,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 842 transitions. [2019-10-14 23:42:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:42:01,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:01,702 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:01,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:01,906 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:01,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:01,907 INFO L82 PathProgramCache]: Analyzing trace with hash -447084202, now seen corresponding path program 1 times [2019-10-14 23:42:01,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:01,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135067456] [2019-10-14 23:42:01,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:01,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:01,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:01,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135067456] [2019-10-14 23:42:01,964 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:01,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:01,965 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126516287] [2019-10-14 23:42:01,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:01,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:01,966 INFO L87 Difference]: Start difference. First operand 545 states and 842 transitions. Second operand 4 states. [2019-10-14 23:42:02,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:02,186 INFO L93 Difference]: Finished difference Result 1053 states and 1621 transitions. [2019-10-14 23:42:02,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:02,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-10-14 23:42:02,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:02,190 INFO L225 Difference]: With dead ends: 1053 [2019-10-14 23:42:02,190 INFO L226 Difference]: Without dead ends: 557 [2019-10-14 23:42:02,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:02,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2019-10-14 23:42:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 555. [2019-10-14 23:42:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2019-10-14 23:42:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 835 transitions. [2019-10-14 23:42:02,208 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 835 transitions. Word has length 45 [2019-10-14 23:42:02,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:02,209 INFO L462 AbstractCegarLoop]: Abstraction has 555 states and 835 transitions. [2019-10-14 23:42:02,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:02,209 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 835 transitions. [2019-10-14 23:42:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 23:42:02,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:02,210 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:02,210 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:02,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:02,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1882634818, now seen corresponding path program 1 times [2019-10-14 23:42:02,211 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:02,211 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022578527] [2019-10-14 23:42:02,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:02,211 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:02,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 23:42:02,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022578527] [2019-10-14 23:42:02,266 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:02,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:42:02,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768867356] [2019-10-14 23:42:02,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:02,267 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:02,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:02,268 INFO L87 Difference]: Start difference. First operand 555 states and 835 transitions. Second operand 4 states. [2019-10-14 23:42:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:02,437 INFO L93 Difference]: Finished difference Result 799 states and 1202 transitions. [2019-10-14 23:42:02,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:02,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-10-14 23:42:02,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:02,440 INFO L225 Difference]: With dead ends: 799 [2019-10-14 23:42:02,440 INFO L226 Difference]: Without dead ends: 313 [2019-10-14 23:42:02,442 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:02,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2019-10-14 23:42:02,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2019-10-14 23:42:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2019-10-14 23:42:02,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 454 transitions. [2019-10-14 23:42:02,453 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 454 transitions. Word has length 55 [2019-10-14 23:42:02,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:02,453 INFO L462 AbstractCegarLoop]: Abstraction has 311 states and 454 transitions. [2019-10-14 23:42:02,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:02,453 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 454 transitions. [2019-10-14 23:42:02,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:42:02,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:02,454 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:02,454 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:02,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:02,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1573307774, now seen corresponding path program 1 times [2019-10-14 23:42:02,456 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:02,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850715759] [2019-10-14 23:42:02,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:02,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:02,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:42:02,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850715759] [2019-10-14 23:42:02,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863880797] [2019-10-14 23:42:02,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:02,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:02,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:42:02,621 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:02,621 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-14 23:42:02,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402748601] [2019-10-14 23:42:02,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:02,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:02,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:02,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:02,623 INFO L87 Difference]: Start difference. First operand 311 states and 454 transitions. Second operand 6 states. [2019-10-14 23:42:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:03,396 INFO L93 Difference]: Finished difference Result 660 states and 968 transitions. [2019-10-14 23:42:03,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:03,397 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-10-14 23:42:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:03,399 INFO L225 Difference]: With dead ends: 660 [2019-10-14 23:42:03,399 INFO L226 Difference]: Without dead ends: 418 [2019-10-14 23:42:03,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2019-10-14 23:42:03,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 389. [2019-10-14 23:42:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-10-14 23:42:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 573 transitions. [2019-10-14 23:42:03,414 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 573 transitions. Word has length 56 [2019-10-14 23:42:03,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:03,414 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 573 transitions. [2019-10-14 23:42:03,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:03,414 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 573 transitions. [2019-10-14 23:42:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 23:42:03,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:03,415 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:03,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:03,622 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:03,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:03,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1831473212, now seen corresponding path program 1 times [2019-10-14 23:42:03,623 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:03,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297504791] [2019-10-14 23:42:03,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:03,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:03,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:42:03,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297504791] [2019-10-14 23:42:03,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033560759] [2019-10-14 23:42:03,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:03,795 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:42:03,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:42:03,817 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:03,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2019-10-14 23:42:03,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879271279] [2019-10-14 23:42:03,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:03,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:03,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:03,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:03,819 INFO L87 Difference]: Start difference. First operand 389 states and 573 transitions. Second operand 6 states. [2019-10-14 23:42:04,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:04,337 INFO L93 Difference]: Finished difference Result 436 states and 639 transitions. [2019-10-14 23:42:04,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:04,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2019-10-14 23:42:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:04,340 INFO L225 Difference]: With dead ends: 436 [2019-10-14 23:42:04,340 INFO L226 Difference]: Without dead ends: 430 [2019-10-14 23:42:04,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2019-10-14 23:42:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 427. [2019-10-14 23:42:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-14 23:42:04,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 627 transitions. [2019-10-14 23:42:04,354 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 627 transitions. Word has length 56 [2019-10-14 23:42:04,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:04,354 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 627 transitions. [2019-10-14 23:42:04,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 627 transitions. [2019-10-14 23:42:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:42:04,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:04,355 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:04,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:04,559 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:04,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1104488738, now seen corresponding path program 1 times [2019-10-14 23:42:04,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:04,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576004851] [2019-10-14 23:42:04,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:04,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:04,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:04,777 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:04,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576004851] [2019-10-14 23:42:04,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805492988] [2019-10-14 23:42:04,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:04,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:42:04,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:04,918 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:04,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2019-10-14 23:42:04,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734538399] [2019-10-14 23:42:04,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:42:04,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:04,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:42:04,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:04,919 INFO L87 Difference]: Start difference. First operand 427 states and 627 transitions. Second operand 10 states. [2019-10-14 23:42:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:05,601 INFO L93 Difference]: Finished difference Result 429 states and 628 transitions. [2019-10-14 23:42:05,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:05,602 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2019-10-14 23:42:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:05,605 INFO L225 Difference]: With dead ends: 429 [2019-10-14 23:42:05,605 INFO L226 Difference]: Without dead ends: 427 [2019-10-14 23:42:05,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2019-10-14 23:42:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2019-10-14 23:42:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-14 23:42:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 626 transitions. [2019-10-14 23:42:05,620 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 626 transitions. Word has length 60 [2019-10-14 23:42:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:05,620 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 626 transitions. [2019-10-14 23:42:05,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:42:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 626 transitions. [2019-10-14 23:42:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 23:42:05,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:05,621 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:05,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:05,826 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:05,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash 855434068, now seen corresponding path program 1 times [2019-10-14 23:42:05,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:05,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590103268] [2019-10-14 23:42:05,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:05,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:05,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:06,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590103268] [2019-10-14 23:42:06,256 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548861847] [2019-10-14 23:42:06,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:06,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:42:06,348 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 15 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:06,449 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:06,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2019-10-14 23:42:06,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294176747] [2019-10-14 23:42:06,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:06,451 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:06,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:06,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:06,452 INFO L87 Difference]: Start difference. First operand 427 states and 626 transitions. Second operand 12 states. [2019-10-14 23:42:08,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:08,320 INFO L93 Difference]: Finished difference Result 455 states and 652 transitions. [2019-10-14 23:42:08,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:42:08,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2019-10-14 23:42:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:08,323 INFO L225 Difference]: With dead ends: 455 [2019-10-14 23:42:08,323 INFO L226 Difference]: Without dead ends: 453 [2019-10-14 23:42:08,323 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:42:08,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-14 23:42:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 428. [2019-10-14 23:42:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2019-10-14 23:42:08,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 627 transitions. [2019-10-14 23:42:08,338 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 627 transitions. Word has length 67 [2019-10-14 23:42:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:08,338 INFO L462 AbstractCegarLoop]: Abstraction has 428 states and 627 transitions. [2019-10-14 23:42:08,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 627 transitions. [2019-10-14 23:42:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 23:42:08,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:08,339 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:08,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:08,551 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:08,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:08,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1201928326, now seen corresponding path program 1 times [2019-10-14 23:42:08,552 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:08,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127587462] [2019-10-14 23:42:08,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:08,552 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:08,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:08,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127587462] [2019-10-14 23:42:08,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734677445] [2019-10-14 23:42:08,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:08,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:08,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:08,760 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:08,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2019-10-14 23:42:08,760 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632133583] [2019-10-14 23:42:08,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:08,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:08,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:08,763 INFO L87 Difference]: Start difference. First operand 428 states and 627 transitions. Second operand 7 states. [2019-10-14 23:42:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:09,712 INFO L93 Difference]: Finished difference Result 865 states and 1269 transitions. [2019-10-14 23:42:09,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:09,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2019-10-14 23:42:09,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:09,716 INFO L225 Difference]: With dead ends: 865 [2019-10-14 23:42:09,716 INFO L226 Difference]: Without dead ends: 545 [2019-10-14 23:42:09,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:09,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-10-14 23:42:09,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 506. [2019-10-14 23:42:09,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2019-10-14 23:42:09,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 746 transitions. [2019-10-14 23:42:09,732 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 746 transitions. Word has length 77 [2019-10-14 23:42:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:09,732 INFO L462 AbstractCegarLoop]: Abstraction has 506 states and 746 transitions. [2019-10-14 23:42:09,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:09,733 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 746 transitions. [2019-10-14 23:42:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-14 23:42:09,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:09,734 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:09,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:09,937 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:09,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:09,937 INFO L82 PathProgramCache]: Analyzing trace with hash 808901316, now seen corresponding path program 1 times [2019-10-14 23:42:09,938 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:09,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249913857] [2019-10-14 23:42:09,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:09,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:09,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,173 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:10,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249913857] [2019-10-14 23:42:10,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290119691] [2019-10-14 23:42:10,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:10,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:10,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 23:42:10,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:10,342 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:42:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:10,395 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:10,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 14 [2019-10-14 23:42:10,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523392788] [2019-10-14 23:42:10,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:42:10,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:10,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:42:10,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:10,397 INFO L87 Difference]: Start difference. First operand 506 states and 746 transitions. Second operand 14 states. [2019-10-14 23:42:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:11,886 INFO L93 Difference]: Finished difference Result 529 states and 778 transitions. [2019-10-14 23:42:11,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:11,886 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-10-14 23:42:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:11,889 INFO L225 Difference]: With dead ends: 529 [2019-10-14 23:42:11,889 INFO L226 Difference]: Without dead ends: 525 [2019-10-14 23:42:11,890 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:42:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2019-10-14 23:42:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 525. [2019-10-14 23:42:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2019-10-14 23:42:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 772 transitions. [2019-10-14 23:42:11,905 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 772 transitions. Word has length 77 [2019-10-14 23:42:11,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:11,905 INFO L462 AbstractCegarLoop]: Abstraction has 525 states and 772 transitions. [2019-10-14 23:42:11,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:42:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 772 transitions. [2019-10-14 23:42:11,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 23:42:11,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:11,907 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:12,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:12,111 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:12,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:12,111 INFO L82 PathProgramCache]: Analyzing trace with hash 704934839, now seen corresponding path program 1 times [2019-10-14 23:42:12,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:12,111 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34486347] [2019-10-14 23:42:12,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:12,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:12,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 99 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:42:12,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34486347] [2019-10-14 23:42:12,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326091572] [2019-10-14 23:42:12,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:12,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:42:12,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 21 proven. 99 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:12,583 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:12,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2019-10-14 23:42:12,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278180944] [2019-10-14 23:42:12,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:42:12,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:42:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:12,584 INFO L87 Difference]: Start difference. First operand 525 states and 772 transitions. Second operand 10 states. [2019-10-14 23:42:13,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:13,589 INFO L93 Difference]: Finished difference Result 555 states and 810 transitions. [2019-10-14 23:42:13,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:13,591 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 87 [2019-10-14 23:42:13,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:13,593 INFO L225 Difference]: With dead ends: 555 [2019-10-14 23:42:13,593 INFO L226 Difference]: Without dead ends: 551 [2019-10-14 23:42:13,593 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:42:13,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2019-10-14 23:42:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 544. [2019-10-14 23:42:13,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2019-10-14 23:42:13,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 798 transitions. [2019-10-14 23:42:13,609 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 798 transitions. Word has length 87 [2019-10-14 23:42:13,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:13,609 INFO L462 AbstractCegarLoop]: Abstraction has 544 states and 798 transitions. [2019-10-14 23:42:13,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:42:13,609 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 798 transitions. [2019-10-14 23:42:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:42:13,610 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:13,610 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2019-10-14 23:42:13,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:13,814 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:13,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1100197245, now seen corresponding path program 1 times [2019-10-14 23:42:13,815 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:13,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600268113] [2019-10-14 23:42:13,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:13,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:13,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:14,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600268113] [2019-10-14 23:42:14,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162362854] [2019-10-14 23:42:14,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:14,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 23:42:14,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:14,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:42:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:14,342 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:14,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2019-10-14 23:42:14,342 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117392319] [2019-10-14 23:42:14,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:42:14,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:42:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:14,345 INFO L87 Difference]: Start difference. First operand 544 states and 798 transitions. Second operand 14 states. [2019-10-14 23:42:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:15,811 INFO L93 Difference]: Finished difference Result 547 states and 801 transitions. [2019-10-14 23:42:15,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:15,815 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2019-10-14 23:42:15,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:15,818 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:42:15,818 INFO L226 Difference]: Without dead ends: 545 [2019-10-14 23:42:15,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:42:15,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2019-10-14 23:42:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 545. [2019-10-14 23:42:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-10-14 23:42:15,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 799 transitions. [2019-10-14 23:42:15,833 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 799 transitions. Word has length 90 [2019-10-14 23:42:15,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:15,834 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 799 transitions. [2019-10-14 23:42:15,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:42:15,834 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 799 transitions. [2019-10-14 23:42:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:42:15,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:15,835 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 23:42:16,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:16,039 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:16,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:16,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1191267151, now seen corresponding path program 1 times [2019-10-14 23:42:16,039 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:16,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895107706] [2019-10-14 23:42:16,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:16,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:16,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 54 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:16,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895107706] [2019-10-14 23:42:16,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670389269] [2019-10-14 23:42:16,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:16,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:16,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 54 proven. 118 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:16,286 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:16,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-14 23:42:16,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537060707] [2019-10-14 23:42:16,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:16,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:16,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:16,288 INFO L87 Difference]: Start difference. First operand 545 states and 799 transitions. Second operand 8 states. [2019-10-14 23:42:17,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:17,561 INFO L93 Difference]: Finished difference Result 1070 states and 1569 transitions. [2019-10-14 23:42:17,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:17,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-10-14 23:42:17,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:17,565 INFO L225 Difference]: With dead ends: 1070 [2019-10-14 23:42:17,565 INFO L226 Difference]: Without dead ends: 672 [2019-10-14 23:42:17,567 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:17,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2019-10-14 23:42:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 623. [2019-10-14 23:42:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-14 23:42:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 918 transitions. [2019-10-14 23:42:17,584 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 918 transitions. Word has length 102 [2019-10-14 23:42:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:17,584 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 918 transitions. [2019-10-14 23:42:17,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 918 transitions. [2019-10-14 23:42:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-14 23:42:17,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:17,586 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 23:42:17,789 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:17,790 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:17,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:17,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1449432589, now seen corresponding path program 1 times [2019-10-14 23:42:17,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:17,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971631161] [2019-10-14 23:42:17,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:17,792 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:17,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:17,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971631161] [2019-10-14 23:42:17,961 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133658131] [2019-10-14 23:42:17,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:18,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 23:42:18,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 24 proven. 148 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:18,157 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:18,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2019-10-14 23:42:18,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051433965] [2019-10-14 23:42:18,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:18,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:18,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:18,169 INFO L87 Difference]: Start difference. First operand 623 states and 918 transitions. Second operand 8 states. [2019-10-14 23:42:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:19,220 INFO L93 Difference]: Finished difference Result 670 states and 984 transitions. [2019-10-14 23:42:19,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:19,220 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 102 [2019-10-14 23:42:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:19,223 INFO L225 Difference]: With dead ends: 670 [2019-10-14 23:42:19,223 INFO L226 Difference]: Without dead ends: 664 [2019-10-14 23:42:19,224 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2019-10-14 23:42:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 661. [2019-10-14 23:42:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-10-14 23:42:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 972 transitions. [2019-10-14 23:42:19,241 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 972 transitions. Word has length 102 [2019-10-14 23:42:19,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:19,242 INFO L462 AbstractCegarLoop]: Abstraction has 661 states and 972 transitions. [2019-10-14 23:42:19,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 972 transitions. [2019-10-14 23:42:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 23:42:19,243 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:19,243 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:19,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:19,448 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash -669250513, now seen corresponding path program 1 times [2019-10-14 23:42:19,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:19,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655873202] [2019-10-14 23:42:19,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:19,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:19,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,736 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:19,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655873202] [2019-10-14 23:42:19,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620290924] [2019-10-14 23:42:19,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:19,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:42:19,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:19,929 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:42:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 24 proven. 160 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:19,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:19,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2019-10-14 23:42:19,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220408097] [2019-10-14 23:42:19,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:42:19,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:19,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:42:19,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:19,991 INFO L87 Difference]: Start difference. First operand 661 states and 972 transitions. Second operand 16 states. [2019-10-14 23:42:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:22,144 INFO L93 Difference]: Finished difference Result 663 states and 973 transitions. [2019-10-14 23:42:22,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:42:22,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2019-10-14 23:42:22,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:22,147 INFO L225 Difference]: With dead ends: 663 [2019-10-14 23:42:22,148 INFO L226 Difference]: Without dead ends: 661 [2019-10-14 23:42:22,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:42:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2019-10-14 23:42:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 661. [2019-10-14 23:42:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2019-10-14 23:42:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 971 transitions. [2019-10-14 23:42:22,165 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 971 transitions. Word has length 106 [2019-10-14 23:42:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:22,165 INFO L462 AbstractCegarLoop]: Abstraction has 661 states and 971 transitions. [2019-10-14 23:42:22,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:42:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 971 transitions. [2019-10-14 23:42:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:42:22,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:22,167 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:22,370 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:22,371 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:22,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:22,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1267384093, now seen corresponding path program 2 times [2019-10-14 23:42:22,371 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:22,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8849440] [2019-10-14 23:42:22,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:22,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:22,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:42:22,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8849440] [2019-10-14 23:42:22,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570038942] [2019-10-14 23:42:22,866 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:22,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:22,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:22,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 23:42:22,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:23,065 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:42:23,171 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 27 proven. 198 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:23,172 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:23,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2019-10-14 23:42:23,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818251289] [2019-10-14 23:42:23,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:42:23,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:42:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:42:23,173 INFO L87 Difference]: Start difference. First operand 661 states and 971 transitions. Second operand 20 states. [2019-10-14 23:42:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:26,250 INFO L93 Difference]: Finished difference Result 702 states and 1010 transitions. [2019-10-14 23:42:26,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:42:26,251 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2019-10-14 23:42:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:26,253 INFO L225 Difference]: With dead ends: 702 [2019-10-14 23:42:26,253 INFO L226 Difference]: Without dead ends: 700 [2019-10-14 23:42:26,254 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 23:42:26,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-14 23:42:26,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 662. [2019-10-14 23:42:26,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662 states. [2019-10-14 23:42:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 972 transitions. [2019-10-14 23:42:26,274 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 972 transitions. Word has length 113 [2019-10-14 23:42:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:26,274 INFO L462 AbstractCegarLoop]: Abstraction has 662 states and 972 transitions. [2019-10-14 23:42:26,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:42:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 972 transitions. [2019-10-14 23:42:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 23:42:26,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:26,276 INFO L380 BasicCegarLoop]: trace histogram [11, 10, 10, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:42:26,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:26,484 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1815351467, now seen corresponding path program 2 times [2019-10-14 23:42:26,485 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:26,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474565446] [2019-10-14 23:42:26,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:26,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:26,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 23:42:26,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474565446] [2019-10-14 23:42:26,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241599886] [2019-10-14 23:42:26,623 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:26,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:26,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:26,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:42:26,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 68 proven. 206 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 23:42:26,800 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:26,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2019-10-14 23:42:26,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257800305] [2019-10-14 23:42:26,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:26,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:26,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:26,801 INFO L87 Difference]: Start difference. First operand 662 states and 972 transitions. Second operand 9 states.