/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-178dd20 [2021-01-06 19:20:26,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:26,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:26,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:26,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:26,451 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:26,452 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:26,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:26,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:26,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:26,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:26,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:26,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:26,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:26,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:26,465 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:26,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:26,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:26,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:26,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:26,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:26,490 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:26,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:26,492 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:26,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:20:26,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:26,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:26,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:26,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:26,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:26,504 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:26,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:26,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:26,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:26,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:26,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:26,515 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:20:26,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:26,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:26,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:26,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:26,547 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:26,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:26,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:26,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:26,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:26,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:26,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:26,549 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:26,549 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:26,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:26,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:26,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:26,550 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:26,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:26,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:26,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:26,551 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:26,551 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:26,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:26,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:26,552 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:26,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:26,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:27,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:27,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:27,048 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:27,049 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:27,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-01-06 19:20:27,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/041aa4e3f/ff6266205efe432abdd7e2fea0715a31/FLAG331ff6c69 [2021-01-06 19:20:27,771 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:27,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2021-01-06 19:20:27,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/041aa4e3f/ff6266205efe432abdd7e2fea0715a31/FLAG331ff6c69 [2021-01-06 19:20:28,163 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/041aa4e3f/ff6266205efe432abdd7e2fea0715a31 [2021-01-06 19:20:28,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:28,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:28,174 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:28,174 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:28,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:28,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228ce9da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28, skipping insertion in model container [2021-01-06 19:20:28,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:28,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:28,371 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] [2021-01-06 19:20:28,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:28,397 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:28,418 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] [2021-01-06 19:20:28,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:28,438 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:28,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28 WrapperNode [2021-01-06 19:20:28,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:28,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:28,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:28,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:28,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,485 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:28,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:28,488 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:28,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:28,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (1/1) ... [2021-01-06 19:20:28,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:28,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:28,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:28,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:28,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (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 [2021-01-06 19:20:28,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:28,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:28,677 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-01-06 19:20:28,677 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-01-06 19:20:28,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:28,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:28,945 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:28,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:28 BoogieIcfgContainer [2021-01-06 19:20:28,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:28,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:28,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:28,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:28,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:28" (1/3) ... [2021-01-06 19:20:28,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fbf809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:28, skipping insertion in model container [2021-01-06 19:20:28,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:28" (2/3) ... [2021-01-06 19:20:28,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fbf809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:28, skipping insertion in model container [2021-01-06 19:20:28,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:28" (3/3) ... [2021-01-06 19:20:28,960 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2021-01-06 19:20:28,968 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:28,973 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:28,996 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:29,060 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:29,061 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:29,061 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:29,061 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:29,061 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:29,062 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:29,062 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:29,062 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:20:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:29,111 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:29,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:29,113 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:29,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:29,119 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:20:29,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:29,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513637466] [2021-01-06 19:20:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:29,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 19:20:29,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513637466] [2021-01-06 19:20:29,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:29,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:29,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419135105] [2021-01-06 19:20:29,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:29,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:29,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:29,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:29,422 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2021-01-06 19:20:29,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:29,570 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 19:20:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:29,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:29,583 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:29,584 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:20:29,587 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 [2021-01-06 19:20:29,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:20:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:20:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:20:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:20:29,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:20:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:29,631 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:20:29,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:20:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:20:29,634 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:29,634 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:29,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:29,635 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:29,636 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:20:29,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:29,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058051719] [2021-01-06 19:20:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:29,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:29,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058051719] [2021-01-06 19:20:29,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809900171] [2021-01-06 19:20:29,820 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 [2021-01-06 19:20:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:29,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:20:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:30,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 19:20:30,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:30,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 19:20:30,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166319222] [2021-01-06 19:20:30,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:20:30,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:30,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:20:30,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:20:30,046 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2021-01-06 19:20:30,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:30,100 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 19:20:30,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 19:20:30,101 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 19:20:30,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:30,103 INFO L225 Difference]: With dead ends: 22 [2021-01-06 19:20:30,103 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 19:20:30,104 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:30,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 19:20:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 19:20:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:20:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 19:20:30,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-01-06 19:20:30,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:30,111 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 19:20:30,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:20:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 19:20:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 19:20:30,112 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:30,112 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:30,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:20:30,326 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:30,328 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-01-06 19:20:30,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:30,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056325217] [2021-01-06 19:20:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:30,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:30,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:30,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:30,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056325217] [2021-01-06 19:20:30,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379142126] [2021-01-06 19:20:30,544 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 [2021-01-06 19:20:30,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:30,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:30,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 19:20:30,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 19:20:30,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:30,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 19:20:30,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734661974] [2021-01-06 19:20:30,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:20:30,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:30,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:20:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:20:30,697 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2021-01-06 19:20:30,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:30,778 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 19:20:30,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:20:30,779 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 19:20:30,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:30,780 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:30,781 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 19:20:30,782 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 [2021-01-06 19:20:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 19:20:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 19:20:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 19:20:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 19:20:30,789 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-01-06 19:20:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:30,789 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 19:20:30,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:20:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 19:20:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:20:30,791 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:30,791 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:31,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:31,005 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:31,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-01-06 19:20:31,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:31,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093175392] [2021-01-06 19:20:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:31,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093175392] [2021-01-06 19:20:31,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623321951] [2021-01-06 19:20:31,199 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 [2021-01-06 19:20:31,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:20:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:31,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 19:20:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:31,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 19:20:31,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:31,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 19:20:31,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869382156] [2021-01-06 19:20:31,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:20:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:31,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:20:31,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:31,363 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 10 states. [2021-01-06 19:20:31,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:31,455 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 19:20:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:20:31,455 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2021-01-06 19:20:31,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:31,458 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:31,458 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 19:20:31,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 19:20:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 19:20:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 19:20:31,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 19:20:31,473 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-01-06 19:20:31,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:31,474 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 19:20:31,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:20:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 19:20:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 19:20:31,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:31,477 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:31,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:31,692 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:31,693 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-01-06 19:20:31,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:31,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813734763] [2021-01-06 19:20:31,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:31,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813734763] [2021-01-06 19:20:31,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558633809] [2021-01-06 19:20:31,948 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 [2021-01-06 19:20:32,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:32,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 19:20:32,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 19:20:32,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:32,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-01-06 19:20:32,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895011169] [2021-01-06 19:20:32,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 19:20:32,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:32,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 19:20:32,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:20:32,114 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2021-01-06 19:20:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:32,200 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-01-06 19:20:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:20:32,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2021-01-06 19:20:32,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:32,202 INFO L225 Difference]: With dead ends: 31 [2021-01-06 19:20:32,203 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:20:32,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:20:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:20:32,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:20:32,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 19:20:32,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-01-06 19:20:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:32,210 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 19:20:32,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 19:20:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 19:20:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:20:32,212 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:32,212 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:32,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:32,426 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:32,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:32,426 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-01-06 19:20:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:32,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883174361] [2021-01-06 19:20:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:32,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:32,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:32,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:32,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:32,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883174361] [2021-01-06 19:20:32,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639266826] [2021-01-06 19:20:32,619 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 [2021-01-06 19:20:32,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 19:20:32,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 19:20:32,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 19:20:32,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:32,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-01-06 19:20:32,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908344011] [2021-01-06 19:20:32,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:20:32,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:32,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:20:32,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:32,879 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 12 states. [2021-01-06 19:20:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:32,984 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 19:20:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 19:20:32,985 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2021-01-06 19:20:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:32,986 INFO L225 Difference]: With dead ends: 34 [2021-01-06 19:20:32,986 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 19:20:32,987 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 [2021-01-06 19:20:32,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 19:20:32,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 19:20:32,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 19:20:32,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 19:20:32,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-01-06 19:20:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:32,993 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 19:20:32,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:20:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 19:20:32,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:20:32,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:32,995 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:33,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:20:33,211 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:33,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:33,212 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-01-06 19:20:33,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:33,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232948787] [2021-01-06 19:20:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:33,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232948787] [2021-01-06 19:20:33,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039379135] [2021-01-06 19:20:33,427 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 [2021-01-06 19:20:33,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 19:20:33,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:33,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:20:33,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:33,671 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 19:20:33,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:33,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-01-06 19:20:33,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215909644] [2021-01-06 19:20:33,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 19:20:33,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 19:20:33,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-01-06 19:20:33,674 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 13 states. [2021-01-06 19:20:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:33,778 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-01-06 19:20:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:20:33,779 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2021-01-06 19:20:33,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:33,781 INFO L225 Difference]: With dead ends: 37 [2021-01-06 19:20:33,781 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 19:20:33,782 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 [2021-01-06 19:20:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 19:20:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 19:20:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 19:20:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 19:20:33,794 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-01-06 19:20:33,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:33,794 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 19:20:33,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 19:20:33,794 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 19:20:33,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:20:33,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:33,797 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:33,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:33,999 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-01-06 19:20:34,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:34,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166311276] [2021-01-06 19:20:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:34,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:20:34,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166311276] [2021-01-06 19:20:34,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151436081] [2021-01-06 19:20:34,274 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 [2021-01-06 19:20:34,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 19:20:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 19:20:34,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:34,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 19:20:34,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060564811] [2021-01-06 19:20:34,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 19:20:34,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:34,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 19:20:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:34,487 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 14 states. [2021-01-06 19:20:34,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:34,611 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 19:20:34,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 19:20:34,612 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2021-01-06 19:20:34,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:34,613 INFO L225 Difference]: With dead ends: 40 [2021-01-06 19:20:34,613 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 19:20:34,614 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 [2021-01-06 19:20:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 19:20:34,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 19:20:34,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 19:20:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 19:20:34,620 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-01-06 19:20:34,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:34,620 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 19:20:34,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 19:20:34,621 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 19:20:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 19:20:34,622 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:34,622 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:34,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:34,835 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-01-06 19:20:34,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:34,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490503505] [2021-01-06 19:20:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:34,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:20:35,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490503505] [2021-01-06 19:20:35,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906036976] [2021-01-06 19:20:35,105 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 [2021-01-06 19:20:35,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:35,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:35,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 19:20:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 19:20:35,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:35,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-01-06 19:20:35,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573074678] [2021-01-06 19:20:35,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 19:20:35,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:35,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 19:20:35,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-01-06 19:20:35,337 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 15 states. [2021-01-06 19:20:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:35,479 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-01-06 19:20:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:20:35,480 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2021-01-06 19:20:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:35,481 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:20:35,481 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:20:35,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:20:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 19:20:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 19:20:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 19:20:35,488 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-01-06 19:20:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:35,489 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 19:20:35,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 19:20:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 19:20:35,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:20:35,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:35,490 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:35,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:20:35,704 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:35,705 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-01-06 19:20:35,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:35,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750199747] [2021-01-06 19:20:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:35,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:20:35,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750199747] [2021-01-06 19:20:35,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016602671] [2021-01-06 19:20:35,989 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 [2021-01-06 19:20:36,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 19:20:36,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 19:20:36,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-01-06 19:20:36,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:36,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-01-06 19:20:36,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293742084] [2021-01-06 19:20:36,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 19:20:36,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:36,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 19:20:36,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:36,219 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 16 states. [2021-01-06 19:20:36,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:36,365 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 19:20:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 19:20:36,366 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 64 [2021-01-06 19:20:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:36,367 INFO L225 Difference]: With dead ends: 46 [2021-01-06 19:20:36,367 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 19:20:36,368 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 [2021-01-06 19:20:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 19:20:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 19:20:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 19:20:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 19:20:36,374 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-01-06 19:20:36,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:36,375 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 19:20:36,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 19:20:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 19:20:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 19:20:36,376 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:36,376 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:36,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:36,591 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:36,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-01-06 19:20:36,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:36,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954967538] [2021-01-06 19:20:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:20:36,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954967538] [2021-01-06 19:20:36,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926944469] [2021-01-06 19:20:36,927 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 [2021-01-06 19:20:37,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:37,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:37,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:20:37,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-01-06 19:20:37,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:37,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-06 19:20:37,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220867253] [2021-01-06 19:20:37,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 19:20:37,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 19:20:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-01-06 19:20:37,172 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 17 states. [2021-01-06 19:20:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:37,330 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-01-06 19:20:37,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:20:37,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2021-01-06 19:20:37,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:37,332 INFO L225 Difference]: With dead ends: 49 [2021-01-06 19:20:37,332 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 19:20:37,333 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 [2021-01-06 19:20:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 19:20:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 19:20:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 19:20:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 19:20:37,339 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-01-06 19:20:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:37,340 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 19:20:37,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 19:20:37,340 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 19:20:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 19:20:37,341 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:37,341 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:37,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:37,556 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:37,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-01-06 19:20:37,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:37,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136960142] [2021-01-06 19:20:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:37,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:20:37,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136960142] [2021-01-06 19:20:37,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971337537] [2021-01-06 19:20:37,969 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 [2021-01-06 19:20:38,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 19:20:38,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:38,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 19:20:38,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 19:20:38,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:38,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-01-06 19:20:38,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345570792] [2021-01-06 19:20:38,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:20:38,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:38,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:20:38,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:20:38,190 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2021-01-06 19:20:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:38,354 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 19:20:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 19:20:38,355 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 76 [2021-01-06 19:20:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:38,356 INFO L225 Difference]: With dead ends: 52 [2021-01-06 19:20:38,356 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 19:20:38,357 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 [2021-01-06 19:20:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 19:20:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 19:20:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 19:20:38,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 19:20:38,363 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-01-06 19:20:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:38,364 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 19:20:38,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:20:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 19:20:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 19:20:38,365 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:38,365 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:38,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 19:20:38,579 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:38,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-01-06 19:20:38,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:38,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059259171] [2021-01-06 19:20:38,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:38,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,054 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:20:39,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059259171] [2021-01-06 19:20:39,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311212524] [2021-01-06 19:20:39,054 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 [2021-01-06 19:20:39,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 19:20:39,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:39,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 19:20:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 19:20:39,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:39,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-06 19:20:39,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602749193] [2021-01-06 19:20:39,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 19:20:39,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 19:20:39,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-01-06 19:20:39,283 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 19 states. [2021-01-06 19:20:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:39,494 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-01-06 19:20:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 19:20:39,495 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2021-01-06 19:20:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:39,496 INFO L225 Difference]: With dead ends: 55 [2021-01-06 19:20:39,496 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 19:20:39,497 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 [2021-01-06 19:20:39,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 19:20:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 19:20:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 19:20:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 19:20:39,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-01-06 19:20:39,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:39,504 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 19:20:39,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 19:20:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 19:20:39,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 19:20:39,505 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:39,506 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:39,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 19:20:39,719 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-01-06 19:20:39,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:39,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683538744] [2021-01-06 19:20:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:39,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:20:40,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683538744] [2021-01-06 19:20:40,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511374753] [2021-01-06 19:20:40,237 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 [2021-01-06 19:20:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 19:20:40,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-01-06 19:20:40,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:40,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 19:20:40,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991598144] [2021-01-06 19:20:40,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 19:20:40,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:40,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 19:20:40,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:20:40,456 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2021-01-06 19:20:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:40,639 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 19:20:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 19:20:40,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 88 [2021-01-06 19:20:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:40,641 INFO L225 Difference]: With dead ends: 58 [2021-01-06 19:20:40,641 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 19:20:40,642 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 [2021-01-06 19:20:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 19:20:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 19:20:40,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 19:20:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 19:20:40,647 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-01-06 19:20:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:40,648 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 19:20:40,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 19:20:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 19:20:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 19:20:40,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:40,649 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:40,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:20:40,864 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:40,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:40,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-01-06 19:20:40,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:40,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256124295] [2021-01-06 19:20:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:40,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:20:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256124295] [2021-01-06 19:20:41,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476078140] [2021-01-06 19:20:41,461 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 [2021-01-06 19:20:41,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:41,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:41,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 19:20:41,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-01-06 19:20:41,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:41,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-01-06 19:20:41,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952620358] [2021-01-06 19:20:41,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 19:20:41,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:41,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 19:20:41,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2021-01-06 19:20:41,697 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 21 states. [2021-01-06 19:20:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:41,907 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-01-06 19:20:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 19:20:41,908 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2021-01-06 19:20:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:41,909 INFO L225 Difference]: With dead ends: 61 [2021-01-06 19:20:41,909 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:20:41,910 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 [2021-01-06 19:20:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:20:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 19:20:41,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:20:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 19:20:41,916 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-01-06 19:20:41,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:41,916 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 19:20:41,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 19:20:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 19:20:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 19:20:41,917 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:41,918 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:42,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:42,131 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:42,132 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-01-06 19:20:42,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:42,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937346242] [2021-01-06 19:20:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:20:42,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937346242] [2021-01-06 19:20:42,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057359844] [2021-01-06 19:20:42,739 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 [2021-01-06 19:20:42,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 19:20:42,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 19:20:42,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:43,017 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-01-06 19:20:43,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:43,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-01-06 19:20:43,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443091301] [2021-01-06 19:20:43,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 19:20:43,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 19:20:43,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:20:43,020 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 22 states. [2021-01-06 19:20:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:43,236 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-01-06 19:20:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 19:20:43,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 100 [2021-01-06 19:20:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:43,238 INFO L225 Difference]: With dead ends: 64 [2021-01-06 19:20:43,238 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 19:20:43,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:20:43,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 19:20:43,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 19:20:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 19:20:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 19:20:43,245 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-01-06 19:20:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:43,245 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 19:20:43,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 19:20:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 19:20:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 19:20:43,246 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:43,246 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:43,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:20:43,460 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:43,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:43,461 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-01-06 19:20:43,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:43,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774863620] [2021-01-06 19:20:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:43,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:43,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:20:44,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774863620] [2021-01-06 19:20:44,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40169497] [2021-01-06 19:20:44,063 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 [2021-01-06 19:20:44,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:44,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:44,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 19:20:44,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-01-06 19:20:44,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:44,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-01-06 19:20:44,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297948507] [2021-01-06 19:20:44,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 19:20:44,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:44,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 19:20:44,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-01-06 19:20:44,324 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 23 states. [2021-01-06 19:20:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:44,564 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-01-06 19:20:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 19:20:44,565 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2021-01-06 19:20:44,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:44,566 INFO L225 Difference]: With dead ends: 67 [2021-01-06 19:20:44,566 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 19:20:44,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 19:20:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 19:20:44,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 19:20:44,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 19:20:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-06 19:20:44,572 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-01-06 19:20:44,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:44,573 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-06 19:20:44,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 19:20:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-06 19:20:44,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 19:20:44,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:44,574 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:44,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 19:20:44,788 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-01-06 19:20:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:44,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325450753] [2021-01-06 19:20:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:44,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:20:45,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325450753] [2021-01-06 19:20:45,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370082458] [2021-01-06 19:20:45,493 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 [2021-01-06 19:20:45,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 19:20:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 19:20:45,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-01-06 19:20:45,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:45,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-01-06 19:20:45,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835047273] [2021-01-06 19:20:45,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 19:20:45,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 19:20:45,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:45,766 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2021-01-06 19:20:46,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:46,055 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-01-06 19:20:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 19:20:46,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2021-01-06 19:20:46,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:46,057 INFO L225 Difference]: With dead ends: 70 [2021-01-06 19:20:46,057 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 19:20:46,058 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 [2021-01-06 19:20:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 19:20:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 19:20:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 19:20:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-01-06 19:20:46,063 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-01-06 19:20:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:46,064 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-01-06 19:20:46,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 19:20:46,064 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-01-06 19:20:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 19:20:46,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:46,066 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:46,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 19:20:46,282 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:46,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:46,283 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-01-06 19:20:46,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:46,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282551902] [2021-01-06 19:20:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:46,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:46,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,067 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:20:47,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282551902] [2021-01-06 19:20:47,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312363894] [2021-01-06 19:20:47,068 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 [2021-01-06 19:20:47,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 19:20:47,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 19:20:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 19:20:47,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:47,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-01-06 19:20:47,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90893618] [2021-01-06 19:20:47,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 19:20:47,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:47,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 19:20:47,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2021-01-06 19:20:47,383 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 25 states. [2021-01-06 19:20:47,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:47,693 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-06 19:20:47,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 19:20:47,694 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 118 [2021-01-06 19:20:47,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:47,696 INFO L225 Difference]: With dead ends: 73 [2021-01-06 19:20:47,696 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 19:20:47,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 19:20:47,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 19:20:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 19:20:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 19:20:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-06 19:20:47,702 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-01-06 19:20:47,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:47,703 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-06 19:20:47,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 19:20:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-06 19:20:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 19:20:47,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:47,704 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:47,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:47,919 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:47,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:47,920 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-01-06 19:20:47,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:47,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627036534] [2021-01-06 19:20:47,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:20:48,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627036534] [2021-01-06 19:20:48,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727221151] [2021-01-06 19:20:48,783 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 [2021-01-06 19:20:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 19:20:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-01-06 19:20:49,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:49,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-01-06 19:20:49,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528965439] [2021-01-06 19:20:49,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 19:20:49,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:49,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 19:20:49,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:20:49,061 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 26 states. [2021-01-06 19:20:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:49,348 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-01-06 19:20:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 19:20:49,349 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 124 [2021-01-06 19:20:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:49,350 INFO L225 Difference]: With dead ends: 76 [2021-01-06 19:20:49,350 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 19:20:49,351 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 [2021-01-06 19:20:49,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 19:20:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 19:20:49,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:20:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 19:20:49,356 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-01-06 19:20:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:49,356 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 19:20:49,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 19:20:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 19:20:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 19:20:49,358 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:49,358 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:49,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:49,573 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:49,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:49,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-01-06 19:20:49,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:49,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834709831] [2021-01-06 19:20:49,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-01-06 19:20:50,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834709831] [2021-01-06 19:20:50,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464939096] [2021-01-06 19:20:50,575 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 [2021-01-06 19:20:50,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:50,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:50,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 19:20:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-01-06 19:20:50,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:50,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-01-06 19:20:50,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637718739] [2021-01-06 19:20:50,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 19:20:50,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 19:20:50,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2021-01-06 19:20:50,915 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 27 states. [2021-01-06 19:20:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:51,248 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-01-06 19:20:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 19:20:51,248 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 130 [2021-01-06 19:20:51,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:51,249 INFO L225 Difference]: With dead ends: 79 [2021-01-06 19:20:51,249 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 19:20:51,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=809, Invalid=1447, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:20:51,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 19:20:51,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 19:20:51,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 19:20:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-01-06 19:20:51,257 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-01-06 19:20:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:51,257 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-01-06 19:20:51,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 19:20:51,258 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-01-06 19:20:51,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 19:20:51,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:51,259 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:51,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 19:20:51,474 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-01-06 19:20:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:51,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703400375] [2021-01-06 19:20:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-01-06 19:20:52,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703400375] [2021-01-06 19:20:52,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279571649] [2021-01-06 19:20:52,481 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 [2021-01-06 19:20:52,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 19:20:52,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 19:20:52,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-01-06 19:20:52,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:52,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-01-06 19:20:52,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547605407] [2021-01-06 19:20:52,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 19:20:52,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:52,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 19:20:52,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:20:52,817 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 28 states. [2021-01-06 19:20:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:53,203 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-01-06 19:20:53,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 19:20:53,204 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 136 [2021-01-06 19:20:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:53,205 INFO L225 Difference]: With dead ends: 82 [2021-01-06 19:20:53,206 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 19:20:53,207 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 [2021-01-06 19:20:53,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 19:20:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 19:20:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 19:20:53,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-01-06 19:20:53,211 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-01-06 19:20:53,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:53,212 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-01-06 19:20:53,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 19:20:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-01-06 19:20:53,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 19:20:53,213 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:53,213 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:53,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 19:20:53,427 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:53,427 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-01-06 19:20:53,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:53,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102153472] [2021-01-06 19:20:53,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-01-06 19:20:54,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102153472] [2021-01-06 19:20:54,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576335763] [2021-01-06 19:20:54,424 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 [2021-01-06 19:20:54,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:54,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:54,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 19:20:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2021-01-06 19:20:54,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:54,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-01-06 19:20:54,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013673688] [2021-01-06 19:20:54,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 19:20:54,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:54,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 19:20:54,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2021-01-06 19:20:54,771 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 29 states. [2021-01-06 19:20:55,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:55,204 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-01-06 19:20:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 19:20:55,205 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2021-01-06 19:20:55,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:55,206 INFO L225 Difference]: With dead ends: 85 [2021-01-06 19:20:55,206 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 19:20:55,208 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 [2021-01-06 19:20:55,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 19:20:55,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 19:20:55,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 19:20:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-01-06 19:20:55,212 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-01-06 19:20:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:55,212 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-01-06 19:20:55,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 19:20:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-01-06 19:20:55,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 19:20:55,214 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:55,214 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:55,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:55,429 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:55,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-01-06 19:20:55,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:55,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698004985] [2021-01-06 19:20:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:55,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 19:20:56,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698004985] [2021-01-06 19:20:56,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530301239] [2021-01-06 19:20:56,552 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 [2021-01-06 19:20:56,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 19:20:56,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:56,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 19:20:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-01-06 19:20:56,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:56,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 30 [2021-01-06 19:20:56,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696989130] [2021-01-06 19:20:56,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 19:20:56,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 19:20:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:20:56,907 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 30 states. [2021-01-06 19:20:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:57,332 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-01-06 19:20:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 19:20:57,332 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 148 [2021-01-06 19:20:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:57,334 INFO L225 Difference]: With dead ends: 88 [2021-01-06 19:20:57,334 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 19:20:57,335 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 [2021-01-06 19:20:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 19:20:57,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-01-06 19:20:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 19:20:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-01-06 19:20:57,339 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-01-06 19:20:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:57,340 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-01-06 19:20:57,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 19:20:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-01-06 19:20:57,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 19:20:57,341 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:57,342 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:57,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 19:20:57,557 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:57,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-01-06 19:20:57,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:57,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122006830] [2021-01-06 19:20:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-01-06 19:20:58,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122006830] [2021-01-06 19:20:58,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100842947] [2021-01-06 19:20:58,717 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 [2021-01-06 19:20:58,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 19:20:58,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:58,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 19:20:58,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:59,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-01-06 19:20:59,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:59,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-01-06 19:20:59,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509959275] [2021-01-06 19:20:59,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 19:20:59,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 19:20:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=545, Unknown=0, NotChecked=0, Total=930 [2021-01-06 19:20:59,119 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 31 states. [2021-01-06 19:20:59,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:59,563 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-01-06 19:20:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 19:20:59,564 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 154 [2021-01-06 19:20:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:59,566 INFO L225 Difference]: With dead ends: 91 [2021-01-06 19:20:59,566 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 19:20:59,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1111, Invalid=1969, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 19:20:59,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 19:20:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 19:20:59,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 19:20:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-01-06 19:20:59,572 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-01-06 19:20:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:59,573 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-01-06 19:20:59,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 19:20:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-01-06 19:20:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 19:20:59,574 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:59,574 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:59,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:59,775 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:59,776 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-01-06 19:20:59,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:59,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768884811] [2021-01-06 19:20:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-01-06 19:21:02,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768884811] [2021-01-06 19:21:02,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029922527] [2021-01-06 19:21:02,914 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 [2021-01-06 19:21:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 107 conjunts are in the unsatisfiable core [2021-01-06 19:21:03,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-01-06 19:21:03,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:03,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2021-01-06 19:21:03,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207598921] [2021-01-06 19:21:03,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 19:21:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:03,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 19:21:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 19:21:03,257 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 55 states. [2021-01-06 19:21:04,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:04,700 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-01-06 19:21:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 19:21:04,701 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 160 [2021-01-06 19:21:04,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:04,702 INFO L225 Difference]: With dead ends: 94 [2021-01-06 19:21:04,702 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 19:21:04,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 19:21:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 19:21:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-01-06 19:21:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 19:21:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-01-06 19:21:04,709 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-01-06 19:21:04,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:04,709 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-01-06 19:21:04,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 19:21:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-01-06 19:21:04,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 19:21:04,710 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:04,710 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:04,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 19:21:04,925 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:04,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:04,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-01-06 19:21:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:04,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76664897] [2021-01-06 19:21:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:05,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 975 proven. 52 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 19:21:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76664897] [2021-01-06 19:21:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067380592] [2021-01-06 19:21:06,546 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 [2021-01-06 19:21:06,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:06,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 19:21:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 1027 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 19:21:06,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 19:21:06,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [31] total 33 [2021-01-06 19:21:06,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405872735] [2021-01-06 19:21:06,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 19:21:06,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:06,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 19:21:06,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=640, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 19:21:06,942 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 31 states. [2021-01-06 19:21:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:07,739 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-01-06 19:21:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 19:21:07,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 166 [2021-01-06 19:21:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:07,741 INFO L225 Difference]: With dead ends: 90 [2021-01-06 19:21:07,741 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:21:07,743 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 [2021-01-06 19:21:07,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:21:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:21:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:21:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:21:07,744 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 166 [2021-01-06 19:21:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:07,744 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:21:07,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 19:21:07,744 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:21:07,744 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:21:07,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 19:21:07,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:21:07,984 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:21:07,984 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:21:07,984 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:21:07,984 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:21:07,984 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2021-01-06 19:21:07,984 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-01-06 19:21:07,984 INFO L189 CegarLoopUtils]: For program point L14(lines 14 16) no Hoare annotation was computed. [2021-01-06 19:21:07,985 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)) [2021-01-06 19:21:07,985 INFO L189 CegarLoopUtils]: For program point L13-1(line 13) no Hoare annotation was computed. [2021-01-06 19:21:07,985 INFO L189 CegarLoopUtils]: For program point L11(lines 11 17) no Hoare annotation was computed. [2021-01-06 19:21:07,985 INFO L189 CegarLoopUtils]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2021-01-06 19:21:07,985 INFO L189 CegarLoopUtils]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2021-01-06 19:21:07,985 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (= |id_#in~x| id_~x) [2021-01-06 19:21:07,985 INFO L192 CegarLoopUtils]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2021-01-06 19:21:07,985 INFO L189 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-01-06 19:21:07,985 INFO L189 CegarLoopUtils]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-01-06 19:21:07,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:21:07 BoogieIcfgContainer [2021-01-06 19:21:07,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:21:07,991 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:21:07,991 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:21:07,991 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:21:07,992 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:28" (3/4) ... [2021-01-06 19:21:07,995 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:21:08,004 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2021-01-06 19:21:08,010 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 19:21:08,011 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 19:21:08,011 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:21:08,011 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:21:08,047 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/id_i25_o25-1.c-witness.graphml [2021-01-06 19:21:08,047 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:21:08,049 INFO L168 Benchmark]: Toolchain (without parser) took 39878.89 ms. Allocated memory was 151.0 MB in the beginning and 733.0 MB in the end (delta: 582.0 MB). Free memory was 127.5 MB in the beginning and 543.5 MB in the end (delta: -416.0 MB). Peak memory consumption was 167.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:08,049 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:21:08,050 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.51 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 118.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:08,050 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.37 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:08,051 INFO L168 Benchmark]: Boogie Preprocessor took 42.09 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.9 MB in the end (delta: 896.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:08,051 INFO L168 Benchmark]: RCFGBuilder took 415.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 104.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:08,051 INFO L168 Benchmark]: TraceAbstraction took 39039.58 ms. Allocated memory was 151.0 MB in the beginning and 733.0 MB in the end (delta: 582.0 MB). Free memory was 104.5 MB in the beginning and 545.6 MB in the end (delta: -441.2 MB). Peak memory consumption was 141.2 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:08,052 INFO L168 Benchmark]: Witness Printer took 56.26 ms. Allocated memory is still 733.0 MB. Free memory was 545.6 MB in the beginning and 543.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:21:08,054 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 123.4 MB in the beginning and 123.3 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 265.51 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 118.2 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 43.37 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.09 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.9 MB in the end (delta: 896.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 415.67 ms. Allocated memory is still 151.0 MB. Free memory was 115.8 MB in the beginning and 104.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 39039.58 ms. Allocated memory was 151.0 MB in the beginning and 733.0 MB in the end (delta: 582.0 MB). Free memory was 104.5 MB in the beginning and 545.6 MB in the end (delta: -441.2 MB). Peak memory consumption was 141.2 MB. Max. memory is 8.0 GB. * Witness Printer took 56.26 ms. Allocated memory is still 733.0 MB. Free memory was 545.6 MB in the beginning and 543.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 3.1 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: 38.9s, 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: 0.1s 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, 1.5s SatisfiabilityAnalysisTime, 21.9s 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...