/usr/bin/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/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:11:03,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:11:03,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:11:03,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:11:03,514 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:11:03,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:11:03,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:11:03,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:11:03,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:11:03,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:11:03,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:11:03,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:11:03,524 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:11:03,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:11:03,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:11:03,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:11:03,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:11:03,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:11:03,531 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:11:03,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:11:03,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:11:03,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:11:03,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:11:03,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:11:03,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:11:03,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:11:03,549 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:11:03,550 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:11:03,552 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 [2020-07-07 11:11:03,579 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:11:03,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:11:03,581 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:11:03,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:11:03,582 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:11:03,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:11:03,582 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:11:03,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:11:03,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:11:03,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:11:03,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:11:03,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:11:03,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:11:03,585 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:11:03,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:11:03,585 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:11:03,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:11:03,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:11:03,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:11:03,586 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:11:03,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:11:03,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:11:03,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:11:03,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:11:03,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:11:03,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:11:03,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:11:03,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:11:03,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:11:03,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:11:03,868 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:11:03,890 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:11:03,894 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:11:03,896 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:11:03,896 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:11:03,897 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-07 11:11:03,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c41ace20/c70a326391f54d90a886b13cc614f1db/FLAG855e1c2e8 [2020-07-07 11:11:04,488 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:11:04,489 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2020-07-07 11:11:04,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c41ace20/c70a326391f54d90a886b13cc614f1db/FLAG855e1c2e8 [2020-07-07 11:11:04,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c41ace20/c70a326391f54d90a886b13cc614f1db [2020-07-07 11:11:04,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:11:04,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:11:04,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:11:04,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:11:04,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:11:04,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:11:04" (1/1) ... [2020-07-07 11:11:04,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@712784df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:04, skipping insertion in model container [2020-07-07 11:11:04,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:11:04" (1/1) ... [2020-07-07 11:11:04,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:11:04,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:11:05,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:11:05,124 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:11:05,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:11:05,162 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:11:05,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05 WrapperNode [2020-07-07 11:11:05,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:11:05,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:11:05,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:11:05,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:11:05,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (1/1) ... [2020-07-07 11:11:05,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (1/1) ... [2020-07-07 11:11:05,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (1/1) ... [2020-07-07 11:11:05,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (1/1) ... [2020-07-07 11:11:05,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (1/1) ... [2020-07-07 11:11:05,272 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (1/1) ... [2020-07-07 11:11:05,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (1/1) ... [2020-07-07 11:11:05,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:11:05,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:11:05,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:11:05,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:11:05,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (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 [2020-07-07 11:11:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:11:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:11:05,350 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-07 11:11:05,351 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-07 11:11:05,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:11:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:11:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:11:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-07 11:11:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-07 11:11:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:11:05,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:11:05,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:11:05,527 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:11:05,528 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:11:05,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:11:05 BoogieIcfgContainer [2020-07-07 11:11:05,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:11:05,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:11:05,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:11:05,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:11:05,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:11:04" (1/3) ... [2020-07-07 11:11:05,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c05f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:11:05, skipping insertion in model container [2020-07-07 11:11:05,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:11:05" (2/3) ... [2020-07-07 11:11:05,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c05f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:11:05, skipping insertion in model container [2020-07-07 11:11:05,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:11:05" (3/3) ... [2020-07-07 11:11:05,542 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-07-07 11:11:05,554 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:11:05,562 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:11:05,578 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:11:05,645 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:11:05,646 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:11:05,646 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:11:05,650 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:11:05,650 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:11:05,651 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:11:05,651 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:11:05,651 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:11:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-07 11:11:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:11:05,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:05,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:05,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:05,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:05,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-07 11:11:05,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:05,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887150436] [2020-07-07 11:11:05,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:11:05,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887150436] [2020-07-07 11:11:05,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:11:05,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:11:05,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240354439] [2020-07-07 11:11:05,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:11:05,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:05,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:11:05,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:11:05,974 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-07 11:11:06,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:06,094 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-07 11:11:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:11:06,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:11:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:06,109 INFO L225 Difference]: With dead ends: 44 [2020-07-07 11:11:06,109 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:11:06,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:11:06,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:11:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:11:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:11:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-07 11:11:06,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-07 11:11:06,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:06,176 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-07 11:11:06,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:11:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-07 11:11:06,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-07 11:11:06,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:06,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:06,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:11:06,180 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:06,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-07 11:11:06,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:06,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438953111] [2020-07-07 11:11:06,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:11:06,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438953111] [2020-07-07 11:11:06,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:11:06,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:11:06,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154496340] [2020-07-07 11:11:06,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:11:06,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:11:06,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:11:06,272 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-07 11:11:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:06,347 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-07 11:11:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:11:06,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-07 11:11:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:06,350 INFO L225 Difference]: With dead ends: 36 [2020-07-07 11:11:06,350 INFO L226 Difference]: Without dead ends: 32 [2020-07-07 11:11:06,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:11:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-07 11:11:06,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-07 11:11:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:11:06,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-07 11:11:06,362 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-07 11:11:06,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:06,362 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-07 11:11:06,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:11:06,363 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-07 11:11:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 11:11:06,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:06,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:06,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:11:06,365 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:06,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-07 11:11:06,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:06,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533639756] [2020-07-07 11:11:06,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:11:06,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533639756] [2020-07-07 11:11:06,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240678577] [2020-07-07 11:11:06,484 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 [2020-07-07 11:11:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:06,530 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:11:06,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:11:06,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:06,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-07 11:11:06,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438430929] [2020-07-07 11:11:06,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:11:06,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:06,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:11:06,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:11:06,632 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-07 11:11:06,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:06,858 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-07-07 11:11:06,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:11:06,859 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-07 11:11:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:06,861 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:11:06,861 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 11:11:06,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:11:06,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 11:11:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-07-07 11:11:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-07 11:11:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-07-07 11:11:06,871 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-07-07 11:11:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:06,872 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-07-07 11:11:06,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:11:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-07-07 11:11:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:11:06,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:06,874 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-07 11:11:07,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:11:07,089 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:07,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:07,091 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-07 11:11:07,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:07,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998200712] [2020-07-07 11:11:07,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:11:07,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998200712] [2020-07-07 11:11:07,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079539664] [2020-07-07 11:11:07,215 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) [2020-07-07 11:11:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,246 INFO L264 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:07,249 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:07,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-07 11:11:07,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:07,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-07-07 11:11:07,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941313481] [2020-07-07 11:11:07,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:11:07,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:07,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:11:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:11:07,293 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2020-07-07 11:11:07,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:07,490 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-07-07 11:11:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:11:07,491 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-07 11:11:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:07,496 INFO L225 Difference]: With dead ends: 54 [2020-07-07 11:11:07,496 INFO L226 Difference]: Without dead ends: 50 [2020-07-07 11:11:07,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:11:07,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-07 11:11:07,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-07 11:11:07,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:11:07,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-07-07 11:11:07,522 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-07-07 11:11:07,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:07,523 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-07-07 11:11:07,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:11:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-07-07 11:11:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-07 11:11:07,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:07,528 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-07 11:11:07,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:07,729 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-07 11:11:07,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:07,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802632609] [2020-07-07 11:11:07,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:11:07,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802632609] [2020-07-07 11:11:07,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432402100] [2020-07-07 11:11:07,827 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 [2020-07-07 11:11:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:07,866 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:11:07,868 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-07 11:11:07,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:07,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2020-07-07 11:11:07,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356339379] [2020-07-07 11:11:07,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:11:07,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:07,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:11:07,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:11:07,932 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states. [2020-07-07 11:11:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:08,218 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2020-07-07 11:11:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:11:08,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-07 11:11:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:08,221 INFO L225 Difference]: With dead ends: 108 [2020-07-07 11:11:08,222 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:11:08,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:11:08,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:11:08,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 11:11:08,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 11:11:08,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2020-07-07 11:11:08,239 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2020-07-07 11:11:08,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:08,239 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2020-07-07 11:11:08,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:11:08,239 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2020-07-07 11:11:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-07 11:11:08,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:08,242 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-07 11:11:08,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:08,458 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:08,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-07 11:11:08,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:08,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96676667] [2020-07-07 11:11:08,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-07-07 11:11:08,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96676667] [2020-07-07 11:11:08,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070914007] [2020-07-07 11:11:08,624 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 [2020-07-07 11:11:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:08,663 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:11:08,666 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-07 11:11:08,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:08,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-07-07 11:11:08,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378067892] [2020-07-07 11:11:08,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:11:08,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:08,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:11:08,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:11:08,750 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 14 states. [2020-07-07 11:11:09,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:09,151 INFO L93 Difference]: Finished difference Result 180 states and 324 transitions. [2020-07-07 11:11:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:11:09,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-07-07 11:11:09,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:09,155 INFO L225 Difference]: With dead ends: 180 [2020-07-07 11:11:09,155 INFO L226 Difference]: Without dead ends: 120 [2020-07-07 11:11:09,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:11:09,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-07 11:11:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-07-07 11:11:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-07 11:11:09,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions. [2020-07-07 11:11:09,180 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40 [2020-07-07 11:11:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:09,181 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 169 transitions. [2020-07-07 11:11:09,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:11:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions. [2020-07-07 11:11:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-07 11:11:09,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:09,185 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-07-07 11:11:09,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:09,398 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:09,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-07 11:11:09,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:09,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999415501] [2020-07-07 11:11:09,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-07-07 11:11:09,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999415501] [2020-07-07 11:11:09,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974137277] [2020-07-07 11:11:09,584 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 [2020-07-07 11:11:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:09,617 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:11:09,620 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-07 11:11:09,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:09,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-07 11:11:09,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485945930] [2020-07-07 11:11:09,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:11:09,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:09,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:11:09,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:11:09,753 INFO L87 Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 15 states. [2020-07-07 11:11:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:10,316 INFO L93 Difference]: Finished difference Result 258 states and 498 transitions. [2020-07-07 11:11:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:11:10,318 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 54 [2020-07-07 11:11:10,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:10,322 INFO L225 Difference]: With dead ends: 258 [2020-07-07 11:11:10,322 INFO L226 Difference]: Without dead ends: 158 [2020-07-07 11:11:10,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:11:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-07 11:11:10,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112. [2020-07-07 11:11:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-07 11:11:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions. [2020-07-07 11:11:10,352 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54 [2020-07-07 11:11:10,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:10,353 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 180 transitions. [2020-07-07 11:11:10,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:11:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions. [2020-07-07 11:11:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-07 11:11:10,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:10,358 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:10,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-07 11:11:10,573 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:10,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:10,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1229769625, now seen corresponding path program 1 times [2020-07-07 11:11:10,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:10,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430486687] [2020-07-07 11:11:10,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-07-07 11:11:10,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430486687] [2020-07-07 11:11:10,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353606998] [2020-07-07 11:11:10,892 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 [2020-07-07 11:11:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:10,939 INFO L264 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:11:10,955 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2020-07-07 11:11:11,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:11,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2020-07-07 11:11:11,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226937196] [2020-07-07 11:11:11,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:11:11,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:11,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:11:11,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:11:11,095 INFO L87 Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 18 states. [2020-07-07 11:11:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:11,847 INFO L93 Difference]: Finished difference Result 243 states and 465 transitions. [2020-07-07 11:11:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:11:11,848 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-07-07 11:11:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:11,853 INFO L225 Difference]: With dead ends: 243 [2020-07-07 11:11:11,854 INFO L226 Difference]: Without dead ends: 110 [2020-07-07 11:11:11,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2020-07-07 11:11:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-07-07 11:11:11,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-07-07 11:11:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-07 11:11:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2020-07-07 11:11:11,905 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 96 [2020-07-07 11:11:11,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:11,908 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2020-07-07 11:11:11,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:11:11,909 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2020-07-07 11:11:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-07-07 11:11:11,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:11,914 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:12,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:12,116 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:12,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash 665434804, now seen corresponding path program 1 times [2020-07-07 11:11:12,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:12,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076482466] [2020-07-07 11:11:12,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 62 proven. 123 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2020-07-07 11:11:12,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076482466] [2020-07-07 11:11:12,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30724728] [2020-07-07 11:11:12,551 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 [2020-07-07 11:11:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:12,613 INFO L264 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:11:12,619 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 49 proven. 112 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-07 11:11:12,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:12,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2020-07-07 11:11:12,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216652991] [2020-07-07 11:11:12,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:11:12,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:12,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:11:12,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:11:12,741 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand 17 states. [2020-07-07 11:11:13,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:13,259 INFO L93 Difference]: Finished difference Result 172 states and 251 transitions. [2020-07-07 11:11:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:11:13,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 137 [2020-07-07 11:11:13,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:13,262 INFO L225 Difference]: With dead ends: 172 [2020-07-07 11:11:13,262 INFO L226 Difference]: Without dead ends: 96 [2020-07-07 11:11:13,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2020-07-07 11:11:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-07-07 11:11:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2020-07-07 11:11:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-07 11:11:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2020-07-07 11:11:13,287 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 137 [2020-07-07 11:11:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:13,287 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2020-07-07 11:11:13,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:11:13,288 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2020-07-07 11:11:13,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-07 11:11:13,292 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:13,292 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:13,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:13,506 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times [2020-07-07 11:11:13,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:13,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530534913] [2020-07-07 11:11:13,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:14,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 141 proven. 247 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2020-07-07 11:11:14,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530534913] [2020-07-07 11:11:14,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672725393] [2020-07-07 11:11:14,121 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 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 [2020-07-07 11:11:14,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:11:14,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:14,206 INFO L264 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:11:14,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 168 proven. 139 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-07-07 11:11:14,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:14,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 25 [2020-07-07 11:11:14,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873642101] [2020-07-07 11:11:14,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 11:11:14,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:14,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 11:11:14,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:11:14,365 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand 25 states. [2020-07-07 11:11:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:15,372 INFO L93 Difference]: Finished difference Result 235 states and 409 transitions. [2020-07-07 11:11:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-07 11:11:15,373 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 177 [2020-07-07 11:11:15,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:15,379 INFO L225 Difference]: With dead ends: 235 [2020-07-07 11:11:15,380 INFO L226 Difference]: Without dead ends: 129 [2020-07-07 11:11:15,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 11:11:15,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-07 11:11:15,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 109. [2020-07-07 11:11:15,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-07 11:11:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 143 transitions. [2020-07-07 11:11:15,410 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 143 transitions. Word has length 177 [2020-07-07 11:11:15,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:15,411 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 143 transitions. [2020-07-07 11:11:15,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 11:11:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 143 transitions. [2020-07-07 11:11:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-07-07 11:11:15,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:15,419 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:15,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-07 11:11:15,636 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:15,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash -445654678, now seen corresponding path program 3 times [2020-07-07 11:11:15,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:15,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619955934] [2020-07-07 11:11:15,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:15,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 126 proven. 236 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2020-07-07 11:11:16,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619955934] [2020-07-07 11:11:16,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865605262] [2020-07-07 11:11:16,276 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:11:16,349 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-07-07 11:11:16,350 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:16,352 INFO L264 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:11:16,360 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 360 proven. 37 refuted. 0 times theorem prover too weak. 831 trivial. 0 not checked. [2020-07-07 11:11:16,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:16,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2020-07-07 11:11:16,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117140115] [2020-07-07 11:11:16,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:11:16,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:16,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:11:16,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:11:16,572 INFO L87 Difference]: Start difference. First operand 109 states and 143 transitions. Second operand 18 states. [2020-07-07 11:11:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:16,951 INFO L93 Difference]: Finished difference Result 212 states and 287 transitions. [2020-07-07 11:11:16,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:11:16,952 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 217 [2020-07-07 11:11:16,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:16,958 INFO L225 Difference]: With dead ends: 212 [2020-07-07 11:11:16,958 INFO L226 Difference]: Without dead ends: 116 [2020-07-07 11:11:16,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:11:16,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-07-07 11:11:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2020-07-07 11:11:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-07 11:11:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 142 transitions. [2020-07-07 11:11:16,983 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 142 transitions. Word has length 217 [2020-07-07 11:11:16,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:16,985 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 142 transitions. [2020-07-07 11:11:16,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:11:16,986 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 142 transitions. [2020-07-07 11:11:16,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-07 11:11:16,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:16,988 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:17,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:17,204 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 4 times [2020-07-07 11:11:17,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:17,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194589567] [2020-07-07 11:11:17,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 165 proven. 92 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-07-07 11:11:17,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194589567] [2020-07-07 11:11:17,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864775845] [2020-07-07 11:11:17,830 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-07-07 11:11:17,911 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:11:17,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:17,914 INFO L264 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:11:17,921 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 141 proven. 34 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-07-07 11:11:18,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:18,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 20 [2020-07-07 11:11:18,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100908113] [2020-07-07 11:11:18,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:11:18,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:18,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:11:18,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:11:18,019 INFO L87 Difference]: Start difference. First operand 113 states and 142 transitions. Second operand 20 states. [2020-07-07 11:11:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:18,513 INFO L93 Difference]: Finished difference Result 224 states and 288 transitions. [2020-07-07 11:11:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:11:18,516 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 150 [2020-07-07 11:11:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:18,519 INFO L225 Difference]: With dead ends: 224 [2020-07-07 11:11:18,519 INFO L226 Difference]: Without dead ends: 121 [2020-07-07 11:11:18,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-07-07 11:11:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-07-07 11:11:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 113. [2020-07-07 11:11:18,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-07 11:11:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 139 transitions. [2020-07-07 11:11:18,534 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 139 transitions. Word has length 150 [2020-07-07 11:11:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:18,535 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 139 transitions. [2020-07-07 11:11:18,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:11:18,536 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 139 transitions. [2020-07-07 11:11:18,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-07 11:11:18,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:18,540 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:18,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:18,756 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:18,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash -678687486, now seen corresponding path program 5 times [2020-07-07 11:11:18,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:18,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722144358] [2020-07-07 11:11:18,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 193 proven. 340 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-07-07 11:11:19,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722144358] [2020-07-07 11:11:19,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101154870] [2020-07-07 11:11:19,509 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-07-07 11:11:19,622 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-07-07 11:11:19,623 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:19,626 INFO L264 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:11:19,632 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:19,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 225 proven. 326 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2020-07-07 11:11:19,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:19,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 28 [2020-07-07 11:11:19,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405608914] [2020-07-07 11:11:19,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 11:11:19,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:19,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 11:11:19,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2020-07-07 11:11:19,869 INFO L87 Difference]: Start difference. First operand 113 states and 139 transitions. Second operand 28 states. [2020-07-07 11:11:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:20,898 INFO L93 Difference]: Finished difference Result 250 states and 338 transitions. [2020-07-07 11:11:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-07 11:11:20,899 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 218 [2020-07-07 11:11:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:20,902 INFO L225 Difference]: With dead ends: 250 [2020-07-07 11:11:20,902 INFO L226 Difference]: Without dead ends: 143 [2020-07-07 11:11:20,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=1929, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 11:11:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-07 11:11:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 125. [2020-07-07 11:11:20,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-07 11:11:20,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2020-07-07 11:11:20,918 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 218 [2020-07-07 11:11:20,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:20,919 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2020-07-07 11:11:20,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 11:11:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2020-07-07 11:11:20,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-07-07 11:11:20,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:20,926 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 16, 16, 15, 14, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:21,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:11:21,141 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:21,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:21,141 INFO L82 PathProgramCache]: Analyzing trace with hash -344547238, now seen corresponding path program 6 times [2020-07-07 11:11:21,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:21,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254196231] [2020-07-07 11:11:21,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:21,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 164 proven. 300 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-07-07 11:11:21,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254196231] [2020-07-07 11:11:21,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788589969] [2020-07-07 11:11:21,848 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 11:11:21,946 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-07-07 11:11:21,946 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:21,948 INFO L264 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:11:21,954 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 872 proven. 70 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2020-07-07 11:11:22,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:22,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2020-07-07 11:11:22,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626196697] [2020-07-07 11:11:22,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:11:22,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:11:22,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:11:22,132 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand 20 states. [2020-07-07 11:11:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:22,595 INFO L93 Difference]: Finished difference Result 253 states and 327 transitions. [2020-07-07 11:11:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:11:22,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 246 [2020-07-07 11:11:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:22,599 INFO L225 Difference]: With dead ends: 253 [2020-07-07 11:11:22,599 INFO L226 Difference]: Without dead ends: 137 [2020-07-07 11:11:22,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-07-07 11:11:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-07 11:11:22,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2020-07-07 11:11:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-07 11:11:22,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2020-07-07 11:11:22,613 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 246 [2020-07-07 11:11:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:22,614 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2020-07-07 11:11:22,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:11:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2020-07-07 11:11:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-07 11:11:22,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:22,617 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:22,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:11:22,833 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:22,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:22,834 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 7 times [2020-07-07 11:11:22,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:22,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198953486] [2020-07-07 11:11:22,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,210 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-07 11:11:24,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198953486] [2020-07-07 11:11:24,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580561358] [2020-07-07 11:11:24,211 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2020-07-07 11:11:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:24,323 INFO L264 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2020-07-07 11:11:24,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2020-07-07 11:11:25,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:25,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-07 11:11:25,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804011649] [2020-07-07 11:11:25,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-07 11:11:25,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:25,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-07 11:11:25,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 11:11:25,307 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand 36 states. [2020-07-07 11:11:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:25,801 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2020-07-07 11:11:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:11:25,802 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-07-07 11:11:25,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:25,804 INFO L225 Difference]: With dead ends: 142 [2020-07-07 11:11:25,805 INFO L226 Difference]: Without dead ends: 138 [2020-07-07 11:11:25,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 233 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 11:11:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-07 11:11:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-07-07 11:11:25,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-07 11:11:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2020-07-07 11:11:25,818 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 177 [2020-07-07 11:11:25,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:25,819 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2020-07-07 11:11:25,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-07 11:11:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2020-07-07 11:11:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-07-07 11:11:25,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:11:25,822 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 15, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:11:26,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-07 11:11:26,036 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:11:26,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:11:26,037 INFO L82 PathProgramCache]: Analyzing trace with hash 77396631, now seen corresponding path program 8 times [2020-07-07 11:11:26,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:11:26,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133451019] [2020-07-07 11:11:26,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:11:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:11:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 230 proven. 366 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2020-07-07 11:11:26,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133451019] [2020-07-07 11:11:26,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56331285] [2020-07-07 11:11:26,801 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 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 [2020-07-07 11:11:26,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:11:26,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:11:26,942 INFO L264 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:11:26,948 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:11:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 118 proven. 460 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2020-07-07 11:11:27,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:11:27,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2020-07-07 11:11:27,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563208875] [2020-07-07 11:11:27,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 11:11:27,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:11:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 11:11:27,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:11:27,221 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand 24 states. [2020-07-07 11:11:27,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:11:27,777 INFO L93 Difference]: Finished difference Result 249 states and 312 transitions. [2020-07-07 11:11:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 11:11:27,778 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 259 [2020-07-07 11:11:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:11:27,779 INFO L225 Difference]: With dead ends: 249 [2020-07-07 11:11:27,779 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:11:27,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 11:11:27,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:11:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:11:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:11:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:11:27,783 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 259 [2020-07-07 11:11:27,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:11:27,783 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:11:27,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 11:11:27,783 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:11:27,783 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:11:27,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:11:27,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:11:29,128 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 6 [2020-07-07 11:11:29,559 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 22 [2020-07-07 11:11:30,162 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 32 [2020-07-07 11:11:30,166 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:11:30,167 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:11:30,167 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:11:30,167 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:11:30,167 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:11:30,167 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:11:30,167 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-07-07 11:11:30,167 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-07-07 11:11:30,167 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-07-07 11:11:30,168 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-07-07 11:11:30,168 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-07-07 11:11:30,168 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-07-07 11:11:30,168 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2020-07-07 11:11:30,168 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-07-07 11:11:30,168 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-07-07 11:11:30,168 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-07-07 11:11:30,168 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (< 1 fibo2_~n) (= fibo2_~n |fibo2_#in~n|)) [2020-07-07 11:11:30,168 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-07-07 11:11:30,169 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (and (or (not (<= |fibo2_#in~n| 4)) (and (<= |fibo2_#t~ret2| 1) (<= 1 |fibo2_#t~ret2|))) (= fibo2_~n |fibo2_#in~n|) (< 1 fibo2_~n) (or (<= 6 |fibo2_#in~n|) (<= |fibo2_#in~n| 3) (and (<= |fibo2_#t~ret2| 3) (<= 3 |fibo2_#t~ret2|)))) [2020-07-07 11:11:30,169 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-07-07 11:11:30,169 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-07-07 11:11:30,169 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-07-07 11:11:30,169 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-07-07 11:11:30,169 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-07-07 11:11:30,169 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-07-07 11:11:30,170 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-07-07 11:11:30,170 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-07-07 11:11:30,170 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|) (<= 6 fibo1_~n)) (<= 7 |fibo1_#in~n|) (and (<= 5 fibo1_~n) (<= |fibo1_#in~n| 5)) (and (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 1) (<= |fibo1_#in~n| 3)) (and (<= fibo1_~n 4) (<= |fibo1_#t~ret0| 2) (<= 2 |fibo1_#t~ret0|) (<= 4 |fibo1_#in~n|))) (< 1 fibo1_~n) (= fibo1_~n |fibo1_#in~n|)) [2020-07-07 11:11:30,170 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-07-07 11:11:30,170 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-07-07 11:11:30,170 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-07-07 11:11:30,170 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-07-07 11:11:30,171 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-07-07 11:11:30,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:11:30 BoogieIcfgContainer [2020-07-07 11:11:30,177 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:11:30,179 INFO L168 Benchmark]: Toolchain (without parser) took 25292.02 ms. Allocated memory was 137.9 MB in the beginning and 587.7 MB in the end (delta: 449.8 MB). Free memory was 101.0 MB in the beginning and 400.3 MB in the end (delta: -299.3 MB). Peak memory consumption was 466.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:30,180 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 137.9 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-07 11:11:30,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.13 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:30,181 INFO L168 Benchmark]: Boogie Preprocessor took 121.77 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 180.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:30,184 INFO L168 Benchmark]: RCFGBuilder took 245.67 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 167.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:30,185 INFO L168 Benchmark]: TraceAbstraction took 24644.02 ms. Allocated memory was 201.9 MB in the beginning and 587.7 MB in the end (delta: 385.9 MB). Free memory was 167.1 MB in the beginning and 400.3 MB in the end (delta: -233.1 MB). Peak memory consumption was 468.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:11:30,190 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 137.9 MB. Free memory is still 119.3 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.13 ms. Allocated memory is still 137.9 MB. Free memory was 100.6 MB in the beginning and 91.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.77 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.2 MB in the beginning and 180.0 MB in the end (delta: -88.8 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.67 ms. Allocated memory is still 201.9 MB. Free memory was 180.0 MB in the beginning and 167.1 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24644.02 ms. Allocated memory was 201.9 MB in the beginning and 587.7 MB in the end (delta: 385.9 MB). Free memory was 167.1 MB in the beginning and 400.3 MB in the end (delta: -233.1 MB). Peak memory consumption was 468.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.3s, OverallIterations: 16, TraceHistogramMax: 19, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 528 SDtfs, 912 SDslu, 4885 SDs, 0 SdLazy, 5811 SolverSat, 948 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2771 GetRequests, 2395 SyntacticMatches, 14 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=135occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 149 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 647 PreInvPairs, 993 NumberOfFragments, 112 HoareAnnotationTreeSize, 647 FomulaSimplifications, 7278 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 11 FomulaSimplificationsInter, 5385 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 9.2s InterpolantComputationTime, 3753 NumberOfCodeBlocks, 3500 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 3723 ConstructedInterpolants, 0 QuantifiedInterpolants, 1205053 SizeOfPredicates, 73 NumberOfNonLiveVariables, 3572 ConjunctsInSsa, 247 ConjunctsInUnsatCore, 30 InterpolantComputations, 2 PerfectInterpolantSequences, 13887/17516 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...