/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:26:41,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:26:41,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:26:41,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:26:41,427 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:26:41,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:26:41,430 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:26:41,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:26:41,435 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:26:41,436 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:26:41,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:26:41,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:26:41,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:26:41,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:26:41,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:26:41,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:26:41,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:26:41,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:26:41,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:26:41,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:26:41,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:26:41,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:26:41,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:26:41,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:26:41,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:26:41,499 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:26:41,500 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:26:41,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:26:41,506 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:26:41,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:26:41,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:26:41,512 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:26:41,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:26:41,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:26:41,517 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:26:41,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:26:41,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:26:41,576 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:26:41,577 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:26:41,579 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:26:41,579 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:26:41,580 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:26:41,580 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:26:41,580 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:26:41,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:26:41,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:26:41,581 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:26:41,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:26:41,582 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:26:41,582 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:26:41,582 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:26:41,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:26:41,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:26:41,583 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:26:41,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:26:41,583 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:26:41,584 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:26:41,584 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:26:41,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:26:41,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:26:41,584 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:26:41,585 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:26:41,585 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:26:42,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:26:42,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:26:42,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:26:42,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:26:42,081 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:26:42,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2020-12-23 09:26:42,165 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6b4813cb/14940cea67084fac86018d3bb8783db4/FLAG5b7a4917a [2020-12-23 09:26:42,788 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:26:42,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2020-12-23 09:26:42,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6b4813cb/14940cea67084fac86018d3bb8783db4/FLAG5b7a4917a [2020-12-23 09:26:43,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d6b4813cb/14940cea67084fac86018d3bb8783db4 [2020-12-23 09:26:43,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:26:43,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:26:43,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:43,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:26:43,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:26:43,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@293085ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43, skipping insertion in model container [2020-12-23 09:26:43,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:26:43,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:26:43,446 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2020-12-23 09:26:43,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:43,470 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:26:43,484 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2020-12-23 09:26:43,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:26:43,501 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:26:43,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43 WrapperNode [2020-12-23 09:26:43,502 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:26:43,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:43,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:26:43,504 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:26:43,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,521 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:26:43,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:26:43,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:26:43,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:26:43,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... [2020-12-23 09:26:43,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:26:43,562 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:26:43,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:26:43,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:26:43,563 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:26:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:26:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:26:43,663 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-23 09:26:43,664 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-23 09:26:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:26:43,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:26:43,884 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:26:43,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:43 BoogieIcfgContainer [2020-12-23 09:26:43,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:26:43,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:26:43,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:26:43,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:26:43,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:26:43" (1/3) ... [2020-12-23 09:26:43,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3633aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:43, skipping insertion in model container [2020-12-23 09:26:43,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:26:43" (2/3) ... [2020-12-23 09:26:43,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3633aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:26:43, skipping insertion in model container [2020-12-23 09:26:43,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:43" (3/3) ... [2020-12-23 09:26:43,895 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2020-12-23 09:26:43,901 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:26:43,906 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:26:43,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:26:43,961 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:26:43,962 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:26:43,962 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:26:43,962 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:26:43,962 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:26:43,962 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:26:43,963 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:26:43,963 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:26:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:26:43,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:26:43,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:43,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:43,985 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:43,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:26:44,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:44,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436318303] [2020-12-23 09:26:44,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:26:44,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436318303] [2020-12-23 09:26:44,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:26:44,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:26:44,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444654680] [2020-12-23 09:26:44,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:26:44,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:44,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:26:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:26:44,290 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:26:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:44,434 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 09:26:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:26:44,437 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:26:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:44,449 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:26:44,449 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:26:44,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:26:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:26:44,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:26:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:26:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:26:44,498 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:26:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:44,498 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:26:44,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:26:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:26:44,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:26:44,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:44,501 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:44,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:26:44,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:44,502 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:26:44,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:44,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412916935] [2020-12-23 09:26:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:26:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412916935] [2020-12-23 09:26:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043373126] [2020-12-23 09:26:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:44,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:26:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:26:44,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:44,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 09:26:44,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633083898] [2020-12-23 09:26:44,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:26:44,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:44,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:26:44,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:26:44,985 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-12-23 09:26:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:45,070 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:26:45,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:26:45,074 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-23 09:26:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:45,075 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:26:45,075 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:26:45,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:26:45,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:26:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:26:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:26:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:26:45,090 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:26:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:45,090 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:26:45,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:26:45,091 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:26:45,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:26:45,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:45,094 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:45,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:26:45,298 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:26:45,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:45,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627255452] [2020-12-23 09:26:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:26:45,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627255452] [2020-12-23 09:26:45,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478462599] [2020-12-23 09:26:45,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:45,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:45,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:45,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:26:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:26:45,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:45,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 09:26:45,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43665481] [2020-12-23 09:26:45,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:26:45,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:45,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:26:45,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:26:45,626 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-12-23 09:26:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:45,729 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:26:45,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:26:45,733 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 09:26:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:45,737 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:26:45,738 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:26:45,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:26:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:26:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:26:45,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:26:45,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 09:26:45,752 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-23 09:26:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:45,753 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 09:26:45,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:26:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 09:26:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:26:45,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:45,762 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:45,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:45,966 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:45,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:45,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-23 09:26:45,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:45,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423421222] [2020-12-23 09:26:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:26:46,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423421222] [2020-12-23 09:26:46,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061670287] [2020-12-23 09:26:46,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:46,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:26:46,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:46,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:26:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:46,272 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:26:46,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:46,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 09:26:46,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349468980] [2020-12-23 09:26:46,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:26:46,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:46,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:26:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:26:46,275 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2020-12-23 09:26:46,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:46,342 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 09:26:46,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:26:46,342 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-12-23 09:26:46,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:46,344 INFO L225 Difference]: With dead ends: 28 [2020-12-23 09:26:46,344 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 09:26:46,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:26:46,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 09:26:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 09:26:46,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:26:46,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 09:26:46,352 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-23 09:26:46,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:46,352 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 09:26:46,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:26:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 09:26:46,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 09:26:46,354 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:46,354 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:46,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:46,569 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:46,571 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-23 09:26:46,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:46,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959544587] [2020-12-23 09:26:46,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:26:46,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959544587] [2020-12-23 09:26:46,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976347495] [2020-12-23 09:26:46,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:46,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:26:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:26:46,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:46,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-23 09:26:46,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984515394] [2020-12-23 09:26:46,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:26:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:26:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:26:46,908 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-12-23 09:26:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:47,003 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-23 09:26:47,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:26:47,004 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-23 09:26:47,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:47,005 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:26:47,006 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:26:47,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:26:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:26:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:26:47,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:26:47,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 09:26:47,014 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-23 09:26:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:47,014 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 09:26:47,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:26:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 09:26:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:26:47,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:47,016 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:47,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:47,230 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:47,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:47,232 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-23 09:26:47,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:47,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984480981] [2020-12-23 09:26:47,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:47,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:26:47,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984480981] [2020-12-23 09:26:47,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953386335] [2020-12-23 09:26:47,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:47,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:26:47,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:47,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:26:47,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:47,708 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:26:47,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:47,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 09:26:47,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099210447] [2020-12-23 09:26:47,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:26:47,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:47,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:26:47,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:26:47,711 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2020-12-23 09:26:47,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:47,808 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 09:26:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:26:47,809 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-23 09:26:47,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:47,810 INFO L225 Difference]: With dead ends: 34 [2020-12-23 09:26:47,810 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 09:26:47,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:26:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 09:26:47,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 09:26:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 09:26:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 09:26:47,818 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-23 09:26:47,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:47,819 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 09:26:47,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:26:47,819 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 09:26:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 09:26:47,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:47,821 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:48,035 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 09:26:48,036 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:48,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-23 09:26:48,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:48,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268400583] [2020-12-23 09:26:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:26:48,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268400583] [2020-12-23 09:26:48,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007368742] [2020-12-23 09:26:48,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:48,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:26:48,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:48,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:26:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:26:48,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:48,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-23 09:26:48,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510560735] [2020-12-23 09:26:48,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:26:48,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:48,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:26:48,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:26:48,471 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2020-12-23 09:26:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:48,587 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-23 09:26:48,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:26:48,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-12-23 09:26:48,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:48,589 INFO L225 Difference]: With dead ends: 37 [2020-12-23 09:26:48,589 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 09:26:48,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:26:48,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 09:26:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 09:26:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 09:26:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 09:26:48,596 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-23 09:26:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:48,597 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 09:26:48,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:26:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 09:26:48,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:26:48,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:48,599 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:48,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:48,814 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:48,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:48,816 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-23 09:26:48,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:48,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657184575] [2020-12-23 09:26:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:48,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:48,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:26:49,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657184575] [2020-12-23 09:26:49,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14743532] [2020-12-23 09:26:49,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 09:26:49,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:26:49,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:49,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-23 09:26:49,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952216582] [2020-12-23 09:26:49,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:26:49,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:26:49,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:26:49,239 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2020-12-23 09:26:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:49,366 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 09:26:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:26:49,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-12-23 09:26:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:49,368 INFO L225 Difference]: With dead ends: 40 [2020-12-23 09:26:49,368 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 09:26:49,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:26:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 09:26:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 09:26:49,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 09:26:49,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 09:26:49,376 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-23 09:26:49,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:49,376 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 09:26:49,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:26:49,376 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 09:26:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:26:49,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:49,378 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:49,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:49,594 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-23 09:26:49,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:49,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367269961] [2020-12-23 09:26:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:49,919 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:26:49,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367269961] [2020-12-23 09:26:49,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504724249] [2020-12-23 09:26:49,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:49,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:49,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:49,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 09:26:50,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:26:50,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:50,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-23 09:26:50,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187397287] [2020-12-23 09:26:50,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:26:50,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:26:50,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:26:50,197 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2020-12-23 09:26:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:50,342 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 09:26:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:26:50,342 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-12-23 09:26:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:50,348 INFO L225 Difference]: With dead ends: 43 [2020-12-23 09:26:50,348 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 09:26:50,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:26:50,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 09:26:50,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 09:26:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 09:26:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 09:26:50,367 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-23 09:26:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:50,368 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 09:26:50,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:26:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 09:26:50,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:26:50,369 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:50,370 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:50,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 09:26:50,574 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:50,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:50,576 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-23 09:26:50,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:50,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521332900] [2020-12-23 09:26:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:26:50,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521332900] [2020-12-23 09:26:50,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305965046] [2020-12-23 09:26:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:51,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:26:51,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:51,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 09:26:51,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:26:51,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:51,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-12-23 09:26:51,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172571113] [2020-12-23 09:26:51,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 09:26:51,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 09:26:51,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-12-23 09:26:51,184 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2020-12-23 09:26:51,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:51,322 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 09:26:51,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:26:51,322 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2020-12-23 09:26:51,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:51,323 INFO L225 Difference]: With dead ends: 46 [2020-12-23 09:26:51,323 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 09:26:51,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-12-23 09:26:51,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 09:26:51,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 09:26:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 09:26:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 09:26:51,331 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-23 09:26:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:51,331 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 09:26:51,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 09:26:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 09:26:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:26:51,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:51,333 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:51,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:51,547 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-23 09:26:51,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:51,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108551406] [2020-12-23 09:26:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 09:26:51,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108551406] [2020-12-23 09:26:51,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006497566] [2020-12-23 09:26:51,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:51,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:51,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 09:26:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-12-23 09:26:52,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:52,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-23 09:26:52,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86574232] [2020-12-23 09:26:52,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 09:26:52,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 09:26:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:26:52,139 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2020-12-23 09:26:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:52,298 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-12-23 09:26:52,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 09:26:52,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-12-23 09:26:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:52,300 INFO L225 Difference]: With dead ends: 49 [2020-12-23 09:26:52,300 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 09:26:52,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:26:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 09:26:52,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 09:26:52,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 09:26:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-12-23 09:26:52,307 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2020-12-23 09:26:52,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:52,308 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-12-23 09:26:52,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 09:26:52,308 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-12-23 09:26:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 09:26:52,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:52,310 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:52,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:52,524 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:52,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2020-12-23 09:26:52,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:52,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617015537] [2020-12-23 09:26:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 09:26:52,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617015537] [2020-12-23 09:26:52,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738610023] [2020-12-23 09:26:52,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:52,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 09:26:52,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:52,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 09:26:52,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:53,131 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-23 09:26:53,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:53,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-23 09:26:53,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687935691] [2020-12-23 09:26:53,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 09:26:53,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:53,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 09:26:53,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-23 09:26:53,134 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-12-23 09:26:53,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:53,335 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 09:26:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 09:26:53,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2020-12-23 09:26:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:53,337 INFO L225 Difference]: With dead ends: 52 [2020-12-23 09:26:53,337 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 09:26:53,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-12-23 09:26:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 09:26:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 09:26:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 09:26:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 09:26:53,361 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2020-12-23 09:26:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:53,361 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 09:26:53,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 09:26:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 09:26:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 09:26:53,365 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:53,366 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:53,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 09:26:53,580 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:53,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:53,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2020-12-23 09:26:53,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:53,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498652127] [2020-12-23 09:26:53,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 09:26:54,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498652127] [2020-12-23 09:26:54,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330479718] [2020-12-23 09:26:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:54,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 09:26:54,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 09:26:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-12-23 09:26:54,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:54,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-23 09:26:54,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510797617] [2020-12-23 09:26:54,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 09:26:54,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:54,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 09:26:54,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:26:54,313 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2020-12-23 09:26:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:54,495 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-12-23 09:26:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 09:26:54,495 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2020-12-23 09:26:54,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:54,500 INFO L225 Difference]: With dead ends: 55 [2020-12-23 09:26:54,500 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 09:26:54,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-12-23 09:26:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 09:26:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 09:26:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 09:26:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-12-23 09:26:54,519 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2020-12-23 09:26:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:54,521 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-12-23 09:26:54,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 09:26:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-12-23 09:26:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 09:26:54,523 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:54,524 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:54,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 09:26:54,738 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2020-12-23 09:26:54,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:54,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760167673] [2020-12-23 09:26:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:54,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 09:26:55,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760167673] [2020-12-23 09:26:55,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661261084] [2020-12-23 09:26:55,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 09:26:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-23 09:26:55,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:55,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-23 09:26:55,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708326264] [2020-12-23 09:26:55,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 09:26:55,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 09:26:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-23 09:26:55,552 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-12-23 09:26:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:55,751 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 09:26:55,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 09:26:55,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2020-12-23 09:26:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:55,753 INFO L225 Difference]: With dead ends: 58 [2020-12-23 09:26:55,753 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 09:26:55,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 09:26:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 09:26:55,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-23 09:26:55,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 09:26:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-12-23 09:26:55,761 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2020-12-23 09:26:55,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:55,761 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-12-23 09:26:55,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 09:26:55,761 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-12-23 09:26:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 09:26:55,762 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:55,763 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:55,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 09:26:55,976 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:55,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:55,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2020-12-23 09:26:55,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:55,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955419415] [2020-12-23 09:26:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 09:26:56,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955419415] [2020-12-23 09:26:56,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181056227] [2020-12-23 09:26:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 09:26:56,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:26:56,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 09:26:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-12-23 09:26:56,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:56,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-23 09:26:56,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270639876] [2020-12-23 09:26:56,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 09:26:56,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:56,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 09:26:56,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:26:56,836 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2020-12-23 09:26:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:57,038 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-12-23 09:26:57,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 09:26:57,039 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2020-12-23 09:26:57,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:57,040 INFO L225 Difference]: With dead ends: 61 [2020-12-23 09:26:57,040 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 09:26:57,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 09:26:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 09:26:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 09:26:57,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 09:26:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-12-23 09:26:57,046 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2020-12-23 09:26:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:57,046 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-12-23 09:26:57,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 09:26:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-12-23 09:26:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 09:26:57,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:57,048 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:57,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:57,262 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:57,263 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2020-12-23 09:26:57,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:57,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978474768] [2020-12-23 09:26:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 09:26:57,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978474768] [2020-12-23 09:26:57,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205406973] [2020-12-23 09:26:57,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:58,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 09:26:58,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:58,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 09:26:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-23 09:26:58,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:58,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-23 09:26:58,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932735741] [2020-12-23 09:26:58,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 09:26:58,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:58,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 09:26:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-12-23 09:26:58,289 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2020-12-23 09:26:58,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:26:58,509 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 09:26:58,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 09:26:58,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2020-12-23 09:26:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:26:58,511 INFO L225 Difference]: With dead ends: 64 [2020-12-23 09:26:58,511 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 09:26:58,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 09:26:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 09:26:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 09:26:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 09:26:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 09:26:58,517 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2020-12-23 09:26:58,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:26:58,517 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 09:26:58,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 09:26:58,517 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 09:26:58,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 09:26:58,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:26:58,519 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:26:58,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 09:26:58,732 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:26:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:26:58,734 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2020-12-23 09:26:58,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:26:58,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645182660] [2020-12-23 09:26:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:26:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:58,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:26:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:26:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 09:26:59,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645182660] [2020-12-23 09:26:59,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842602799] [2020-12-23 09:26:59,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:26:59,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:26:59,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:26:59,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 09:26:59,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:26:59,737 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-23 09:26:59,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:26:59,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-12-23 09:26:59,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362377806] [2020-12-23 09:26:59,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 09:26:59,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:26:59,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 09:26:59,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:26:59,740 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 23 states. [2020-12-23 09:27:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:00,028 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 09:27:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 09:27:00,028 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-12-23 09:27:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:00,030 INFO L225 Difference]: With dead ends: 67 [2020-12-23 09:27:00,030 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 09:27:00,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 09:27:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 09:27:00,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-23 09:27:00,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 09:27:00,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-23 09:27:00,036 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2020-12-23 09:27:00,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:00,036 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-23 09:27:00,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 09:27:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-23 09:27:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 09:27:00,038 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:00,038 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:00,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 09:27:00,253 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:00,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:00,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2020-12-23 09:27:00,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:00,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288526713] [2020-12-23 09:27:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:00,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-23 09:27:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288526713] [2020-12-23 09:27:01,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351513273] [2020-12-23 09:27:01,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:01,138 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 09:27:01,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:01,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 09:27:01,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-12-23 09:27:01,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:01,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-23 09:27:01,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318315411] [2020-12-23 09:27:01,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 09:27:01,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 09:27:01,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-12-23 09:27:01,331 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-12-23 09:27:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:01,601 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-12-23 09:27:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 09:27:01,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-12-23 09:27:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:01,603 INFO L225 Difference]: With dead ends: 70 [2020-12-23 09:27:01,604 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 09:27:01,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 09:27:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 09:27:01,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-23 09:27:01,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 09:27:01,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-12-23 09:27:01,609 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2020-12-23 09:27:01,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:01,610 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-12-23 09:27:01,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 09:27:01,610 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-12-23 09:27:01,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 09:27:01,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:01,611 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:01,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 09:27:01,827 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:01,828 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2020-12-23 09:27:01,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:01,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861207660] [2020-12-23 09:27:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:01,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 09:27:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861207660] [2020-12-23 09:27:02,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522065846] [2020-12-23 09:27:02,561 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:02,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 09:27:02,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:02,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 09:27:02,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-12-23 09:27:02,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:02,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-12-23 09:27:02,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338233385] [2020-12-23 09:27:02,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 09:27:02,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:02,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 09:27:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:27:02,868 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 25 states. [2020-12-23 09:27:03,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:03,151 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-12-23 09:27:03,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 09:27:03,151 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 118 [2020-12-23 09:27:03,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:03,152 INFO L225 Difference]: With dead ends: 73 [2020-12-23 09:27:03,152 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 09:27:03,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 09:27:03,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 09:27:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-12-23 09:27:03,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 09:27:03,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-12-23 09:27:03,158 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2020-12-23 09:27:03,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:03,158 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-12-23 09:27:03,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 09:27:03,158 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-12-23 09:27:03,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 09:27:03,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:03,160 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:03,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:03,375 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2020-12-23 09:27:03,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:03,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845017391] [2020-12-23 09:27:03,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:03,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:03,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-23 09:27:04,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845017391] [2020-12-23 09:27:04,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96556052] [2020-12-23 09:27:04,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:04,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 09:27:04,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-12-23 09:27:04,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:04,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-12-23 09:27:04,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526184409] [2020-12-23 09:27:04,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 09:27:04,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:04,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 09:27:04,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-12-23 09:27:04,478 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 26 states. [2020-12-23 09:27:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:04,757 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 09:27:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 09:27:04,759 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2020-12-23 09:27:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:04,760 INFO L225 Difference]: With dead ends: 76 [2020-12-23 09:27:04,760 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 09:27:04,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 09:27:04,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 09:27:04,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-23 09:27:04,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 09:27:04,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 09:27:04,766 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2020-12-23 09:27:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:04,766 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 09:27:04,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 09:27:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 09:27:04,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 09:27:04,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:04,768 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:04,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:04,985 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:04,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2020-12-23 09:27:04,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:04,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826813519] [2020-12-23 09:27:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-12-23 09:27:05,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826813519] [2020-12-23 09:27:05,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780306322] [2020-12-23 09:27:05,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:05,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:05,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 09:27:05,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-12-23 09:27:06,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:06,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2020-12-23 09:27:06,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525983356] [2020-12-23 09:27:06,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 09:27:06,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 09:27:06,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-12-23 09:27:06,196 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2020-12-23 09:27:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:06,547 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-12-23 09:27:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 09:27:06,547 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2020-12-23 09:27:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:06,549 INFO L225 Difference]: With dead ends: 79 [2020-12-23 09:27:06,549 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 09:27:06,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 09:27:06,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 09:27:06,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 09:27:06,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 09:27:06,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-12-23 09:27:06,555 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2020-12-23 09:27:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:06,555 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-12-23 09:27:06,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 09:27:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-12-23 09:27:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 09:27:06,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:06,557 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:06,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 09:27:06,773 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:06,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2020-12-23 09:27:06,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:06,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574928677] [2020-12-23 09:27:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:06,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:06,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:06,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:06,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:06,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-23 09:27:07,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574928677] [2020-12-23 09:27:07,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316488530] [2020-12-23 09:27:07,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:07,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 09:27:07,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:07,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 09:27:07,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-12-23 09:27:08,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:08,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2020-12-23 09:27:08,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088408477] [2020-12-23 09:27:08,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 09:27:08,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:08,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 09:27:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-12-23 09:27:08,102 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 28 states. [2020-12-23 09:27:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:08,434 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-12-23 09:27:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 09:27:08,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2020-12-23 09:27:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:08,437 INFO L225 Difference]: With dead ends: 82 [2020-12-23 09:27:08,437 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 09:27:08,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=880, Invalid=1570, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 09:27:08,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 09:27:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-12-23 09:27:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-23 09:27:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-12-23 09:27:08,443 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2020-12-23 09:27:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:08,444 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-12-23 09:27:08,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 09:27:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-12-23 09:27:08,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 09:27:08,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:08,445 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:08,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 09:27:08,660 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:08,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:08,661 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2020-12-23 09:27:08,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:08,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499825970] [2020-12-23 09:27:08,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:08,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:09,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-23 09:27:09,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499825970] [2020-12-23 09:27:09,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438806072] [2020-12-23 09:27:09,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:09,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:09,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:09,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 09:27:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:10,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-12-23 09:27:10,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:10,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2020-12-23 09:27:10,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082649347] [2020-12-23 09:27:10,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 09:27:10,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:10,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 09:27:10,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-12-23 09:27:10,262 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 29 states. [2020-12-23 09:27:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:10,646 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-12-23 09:27:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 09:27:10,647 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-12-23 09:27:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:10,648 INFO L225 Difference]: With dead ends: 85 [2020-12-23 09:27:10,649 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 09:27:10,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 09:27:10,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 09:27:10,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 09:27:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 09:27:10,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-12-23 09:27:10,655 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2020-12-23 09:27:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:10,655 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-12-23 09:27:10,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 09:27:10,656 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-12-23 09:27:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 09:27:10,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:10,657 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:10,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:10,872 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:10,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2020-12-23 09:27:10,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:10,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660179565] [2020-12-23 09:27:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:10,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:10,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:11,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-23 09:27:12,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660179565] [2020-12-23 09:27:12,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323825003] [2020-12-23 09:27:12,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:12,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 09:27:12,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:12,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 09:27:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-12-23 09:27:12,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:12,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2020-12-23 09:27:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787577722] [2020-12-23 09:27:12,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 09:27:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:12,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 09:27:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-12-23 09:27:12,481 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 30 states. [2020-12-23 09:27:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:12,913 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-12-23 09:27:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 09:27:12,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 148 [2020-12-23 09:27:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:12,915 INFO L225 Difference]: With dead ends: 88 [2020-12-23 09:27:12,915 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 09:27:12,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1031, Invalid=1831, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 09:27:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 09:27:12,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-12-23 09:27:12,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 09:27:12,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-12-23 09:27:12,921 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2020-12-23 09:27:12,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:12,922 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-12-23 09:27:12,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 09:27:12,922 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-12-23 09:27:12,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 09:27:12,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:12,923 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:13,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 09:27:13,136 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:13,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2020-12-23 09:27:13,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:13,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059594178] [2020-12-23 09:27:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:13,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:13,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:14,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:14,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:14,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:14,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:14,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:14,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:14,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:14,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-12-23 09:27:14,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059594178] [2020-12-23 09:27:14,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938988687] [2020-12-23 09:27:14,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:14,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 09:27:14,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:14,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 09:27:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-12-23 09:27:14,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:14,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2020-12-23 09:27:14,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120826133] [2020-12-23 09:27:14,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 09:27:14,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 09:27:14,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2020-12-23 09:27:14,778 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 31 states. [2020-12-23 09:27:15,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:15,214 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-12-23 09:27:15,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 09:27:15,214 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2020-12-23 09:27:15,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:15,215 INFO L225 Difference]: With dead ends: 91 [2020-12-23 09:27:15,216 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 09:27:15,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 09:27:15,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 09:27:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-23 09:27:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 09:27:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-23 09:27:15,222 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2020-12-23 09:27:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:15,222 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-23 09:27:15,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 09:27:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-23 09:27:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 09:27:15,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:15,224 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:15,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:15,438 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2020-12-23 09:27:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:15,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474685106] [2020-12-23 09:27:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:15,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:15,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-23 09:27:18,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474685106] [2020-12-23 09:27:18,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210584622] [2020-12-23 09:27:18,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-23 09:27:18,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-12-23 09:27:19,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:19,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2020-12-23 09:27:19,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837961538] [2020-12-23 09:27:19,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 09:27:19,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:19,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 09:27:19,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 09:27:19,201 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 55 states. [2020-12-23 09:27:20,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:20,603 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-12-23 09:27:20,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 09:27:20,604 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 160 [2020-12-23 09:27:20,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:20,605 INFO L225 Difference]: With dead ends: 94 [2020-12-23 09:27:20,605 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 09:27:20,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 09:27:20,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 09:27:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-12-23 09:27:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 09:27:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-12-23 09:27:20,612 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2020-12-23 09:27:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:20,612 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-12-23 09:27:20,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 09:27:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-12-23 09:27:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 09:27:20,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:20,614 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:20,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 09:27:20,830 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2020-12-23 09:27:20,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:20,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137959065] [2020-12-23 09:27:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:20,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:22,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:22,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-23 09:27:22,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137959065] [2020-12-23 09:27:22,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099597340] [2020-12-23 09:27:22,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:22,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:22,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:22,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 09:27:22,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:22,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-12-23 09:27:22,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 09:27:22,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2020-12-23 09:27:22,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034524928] [2020-12-23 09:27:22,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 09:27:22,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:22,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 09:27:22,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 09:27:22,702 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 31 states. [2020-12-23 09:27:23,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:23,494 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-12-23 09:27:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 09:27:23,495 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 166 [2020-12-23 09:27:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:23,500 INFO L225 Difference]: With dead ends: 90 [2020-12-23 09:27:23,500 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:27:23,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1226, Invalid=2314, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 09:27:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:27:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:27:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:27:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:27:23,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2020-12-23 09:27:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:23,504 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:27:23,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 09:27:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:27:23,504 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:27:23,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 09:27:23,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:27:23,746 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:27:23,746 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:27:23,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:27:23,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:27:23,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-12-23 09:27:23,747 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-23 09:27:23,747 INFO L189 CegarLoopUtils]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-12-23 09:27:23,747 INFO L185 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 25) (<= 25 ULTIMATE.start_main_~input~0)) [2020-12-23 09:27:23,747 INFO L189 CegarLoopUtils]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-23 09:27:23,748 INFO L189 CegarLoopUtils]: For program point L11(lines 11 17) no Hoare annotation was computed. [2020-12-23 09:27:23,748 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-12-23 09:27:23,748 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-12-23 09:27:23,748 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-12-23 09:27:23,748 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-12-23 09:27:23,748 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-23 09:27:23,748 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-12-23 09:27:23,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:27:23 BoogieIcfgContainer [2020-12-23 09:27:23,759 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:27:23,759 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:27:23,759 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:27:23,760 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:27:23,760 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:26:43" (3/4) ... [2020-12-23 09:27:23,765 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:27:23,776 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-12-23 09:27:23,786 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:27:23,786 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 09:27:23,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:23,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:23,842 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_i25_o25-1.c-witness.graphml [2020-12-23 09:27:23,842 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:27:23,845 INFO L168 Benchmark]: Toolchain (without parser) took 40655.81 ms. Allocated memory was 156.2 MB in the beginning and 690.0 MB in the end (delta: 533.7 MB). Free memory was 130.6 MB in the beginning and 260.4 MB in the end (delta: -129.8 MB). Peak memory consumption was 404.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:23,845 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory was 130.2 MB in the beginning and 130.1 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:23,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.85 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 121.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:23,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.87 ms. Allocated memory is still 156.2 MB. Free memory was 121.2 MB in the beginning and 119.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:23,849 INFO L168 Benchmark]: Boogie Preprocessor took 20.09 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 119.0 MB in the end (delta: 928.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:23,849 INFO L168 Benchmark]: RCFGBuilder took 324.21 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 107.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:23,850 INFO L168 Benchmark]: TraceAbstraction took 39870.97 ms. Allocated memory was 156.2 MB in the beginning and 690.0 MB in the end (delta: 533.7 MB). Free memory was 107.5 MB in the beginning and 263.0 MB in the end (delta: -155.5 MB). Peak memory consumption was 379.3 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:23,850 INFO L168 Benchmark]: Witness Printer took 83.14 ms. Allocated memory is still 690.0 MB. Free memory was 263.0 MB in the beginning and 260.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:23,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory was 130.2 MB in the beginning and 130.1 MB in the end (delta: 84.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 308.85 ms. Allocated memory is still 156.2 MB. Free memory was 130.3 MB in the beginning and 121.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.87 ms. Allocated memory is still 156.2 MB. Free memory was 121.2 MB in the beginning and 119.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.09 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 119.0 MB in the end (delta: 928.8 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 324.21 ms. Allocated memory is still 156.2 MB. Free memory was 119.0 MB in the beginning and 107.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 39870.97 ms. Allocated memory was 156.2 MB in the beginning and 690.0 MB in the end (delta: 533.7 MB). Free memory was 107.5 MB in the beginning and 263.0 MB in the end (delta: -155.5 MB). Peak memory consumption was 379.3 MB. Max. memory is 8.0 GB. * Witness Printer took 83.14 ms. Allocated memory is still 690.0 MB. Free memory was 263.0 MB in the beginning and 260.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.7s, OverallIterations: 27, TraceHistogramMax: 27, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 373 SDtfs, 1219 SDslu, 4159 SDs, 0 SdLazy, 3222 SolverSat, 293 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3933 GetRequests, 3072 SyntacticMatches, 2 SemanticMatches, 859 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=26, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 27 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 22.8s InterpolantComputationTime, 4742 NumberOfCodeBlocks, 4742 NumberOfCodeBlocksAsserted, 226 NumberOfCheckSat, 4689 ConstructedInterpolants, 0 QuantifiedInterpolants, 1436265 SizeOfPredicates, 377 NumberOfNonLiveVariables, 6266 ConjunctsInSsa, 859 ConjunctsInUnsatCore, 53 InterpolantComputations, 2 PerfectInterpolantSequences, 20956/37908 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...