/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_o100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:20:44,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:20:44,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:20:44,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:20:44,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:20:44,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:20:44,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:20:44,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:20:44,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:20:44,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:20:44,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:20:44,337 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:20:44,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:20:44,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:20:44,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:20:44,361 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:20:44,363 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:20:44,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:20:44,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:20:44,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:20:44,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:20:44,386 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:20:44,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:20:44,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:20:44,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:20:44,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:20:44,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:20:44,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:20:44,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:20:44,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:20:44,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:20:44,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:20:44,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:20:44,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:20:44,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:20:44,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:20:44,429 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 19:20:44,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:20:44,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:20:44,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:20:44,493 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:20:44,493 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:20:44,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:20:44,494 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:20:44,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:20:44,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:20:44,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:20:44,495 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:20:44,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:20:44,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:20:44,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:20:44,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:20:44,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:20:44,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:20:44,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:20:44,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:20:44,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:20:44,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:20:44,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:20:44,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:20:44,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:20:44,500 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:20:44,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:20:44,944 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:20:44,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:20:44,984 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:20:44,985 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:20:44,986 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:20:44,987 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o100.c [2021-01-06 19:20:45,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2edbcc37b/78372c91c7654b1f8b87eb444fae0109/FLAGf4aefb103 [2021-01-06 19:20:45,654 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:20:45,655 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o100.c [2021-01-06 19:20:45,664 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2edbcc37b/78372c91c7654b1f8b87eb444fae0109/FLAGf4aefb103 [2021-01-06 19:20:46,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/2edbcc37b/78372c91c7654b1f8b87eb444fae0109 [2021-01-06 19:20:46,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:20:46,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:20:46,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:46,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:20:46,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:20:46,031 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1983148a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46, skipping insertion in model container [2021-01-06 19:20:46,032 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:20:46,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:20:46,205 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_o100.c[518,531] [2021-01-06 19:20:46,208 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:46,222 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:20:46,238 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_o100.c[518,531] [2021-01-06 19:20:46,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:20:46,257 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:20:46,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46 WrapperNode [2021-01-06 19:20:46,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:20:46,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:46,259 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:20:46,259 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:20:46,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,276 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,296 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:20:46,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:20:46,297 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:20:46,297 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:20:46,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (1/1) ... [2021-01-06 19:20:46,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:20:46,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:20:46,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:20:46,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:20:46,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (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 19:20:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:20:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:20:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:20:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure id [2021-01-06 19:20:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2021-01-06 19:20:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:20:46,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:20:46,696 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:20:46,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:46 BoogieIcfgContainer [2021-01-06 19:20:46,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:20:46,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:20:46,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:20:46,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:20:46,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:20:46" (1/3) ... [2021-01-06 19:20:46,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd3e803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:46, skipping insertion in model container [2021-01-06 19:20:46,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:20:46" (2/3) ... [2021-01-06 19:20:46,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cd3e803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:20:46, skipping insertion in model container [2021-01-06 19:20:46,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:20:46" (3/3) ... [2021-01-06 19:20:46,711 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o100.c [2021-01-06 19:20:46,733 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:20:46,749 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:20:46,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:20:46,830 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:20:46,830 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:20:46,830 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:20:46,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:20:46,831 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:20:46,831 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:20:46,831 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:20:46,832 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:20:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2021-01-06 19:20:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 19:20:46,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:46,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:46,862 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:46,871 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2021-01-06 19:20:46,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:46,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716629752] [2021-01-06 19:20:46,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,208 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 19:20:47,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716629752] [2021-01-06 19:20:47,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:20:47,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:20:47,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829573716] [2021-01-06 19:20:47,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:20:47,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:47,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:20:47,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:47,252 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2021-01-06 19:20:47,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:47,356 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-01-06 19:20:47,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:20:47,358 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 19:20:47,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:47,378 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:47,379 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 19:20:47,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:20:47,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 19:20:47,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-01-06 19:20:47,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 19:20:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-01-06 19:20:47,435 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2021-01-06 19:20:47,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:47,436 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-01-06 19:20:47,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:20:47,437 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-01-06 19:20:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 19:20:47,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:47,441 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:47,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:20:47,442 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2021-01-06 19:20:47,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:47,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567433047] [2021-01-06 19:20:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,816 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 19:20:47,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567433047] [2021-01-06 19:20:47,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101228087] [2021-01-06 19:20:47,817 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 19:20:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:47,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 19:20:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:48,080 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 19:20:48,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:48,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 19:20:48,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933099501] [2021-01-06 19:20:48,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:20:48,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:48,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:20:48,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:20:48,085 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2021-01-06 19:20:48,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:48,137 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 19:20:48,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 19:20:48,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2021-01-06 19:20:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:48,139 INFO L225 Difference]: With dead ends: 22 [2021-01-06 19:20:48,139 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 19:20:48,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:20:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 19:20:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 19:20:48,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 19:20:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-01-06 19:20:48,147 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2021-01-06 19:20:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:48,148 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-01-06 19:20:48,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:20:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-01-06 19:20:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 19:20:48,149 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:48,149 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:48,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:20:48,364 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:48,366 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2021-01-06 19:20:48,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:48,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653159862] [2021-01-06 19:20:48,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:48,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:48,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:48,656 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 19:20:48,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653159862] [2021-01-06 19:20:48,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344021154] [2021-01-06 19:20:48,658 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 19:20:48,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:48,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:48,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 19:20:48,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:48,903 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 19:20:48,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:48,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 19:20:48,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606937798] [2021-01-06 19:20:48,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 19:20:48,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 19:20:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:48,907 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 10 states. [2021-01-06 19:20:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:48,965 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-01-06 19:20:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:20:48,966 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2021-01-06 19:20:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:48,967 INFO L225 Difference]: With dead ends: 25 [2021-01-06 19:20:48,967 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 19:20:48,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-01-06 19:20:48,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 19:20:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-01-06 19:20:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 19:20:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-01-06 19:20:48,975 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2021-01-06 19:20:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:48,976 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-01-06 19:20:48,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 19:20:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-01-06 19:20:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 19:20:48,977 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:48,977 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:49,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:49,192 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:49,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2021-01-06 19:20:49,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:49,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713664517] [2021-01-06 19:20:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:49,594 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 19:20:49,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713664517] [2021-01-06 19:20:49,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407210587] [2021-01-06 19:20:49,595 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 19:20:49,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 19:20:49,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:49,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 19:20:49,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:49,862 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 19:20:49,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:49,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 19:20:49,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089588738] [2021-01-06 19:20:49,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 19:20:49,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:49,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 19:20:49,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:49,866 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 12 states. [2021-01-06 19:20:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:49,960 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-01-06 19:20:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 19:20:49,961 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2021-01-06 19:20:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:49,963 INFO L225 Difference]: With dead ends: 28 [2021-01-06 19:20:49,963 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 19:20:49,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 19:20:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 19:20:49,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-01-06 19:20:49,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 19:20:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-01-06 19:20:49,972 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2021-01-06 19:20:49,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:49,972 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-01-06 19:20:49,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 19:20:49,973 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-01-06 19:20:49,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 19:20:49,974 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:49,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:50,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:50,189 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:50,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:50,190 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2021-01-06 19:20:50,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:50,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826967378] [2021-01-06 19:20:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:50,577 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 19:20:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826967378] [2021-01-06 19:20:50,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533636882] [2021-01-06 19:20:50,578 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 19:20:50,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:50,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:50,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:20:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:50,805 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 19:20:50,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:50,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 19:20:50,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508295550] [2021-01-06 19:20:50,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 19:20:50,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:50,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 19:20:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:50,808 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 14 states. [2021-01-06 19:20:50,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:50,924 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-01-06 19:20:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 19:20:50,925 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2021-01-06 19:20:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:50,927 INFO L225 Difference]: With dead ends: 31 [2021-01-06 19:20:50,927 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:20:50,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-01-06 19:20:50,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:20:50,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:20:50,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:20:50,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-01-06 19:20:50,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2021-01-06 19:20:50,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:50,935 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-01-06 19:20:50,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 19:20:50,935 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-01-06 19:20:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-01-06 19:20:50,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:50,939 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:51,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:51,141 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:51,142 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2021-01-06 19:20:51,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:51,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115422662] [2021-01-06 19:20:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:51,582 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 19:20:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115422662] [2021-01-06 19:20:51,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251793094] [2021-01-06 19:20:51,583 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 19:20:51,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 19:20:51,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:51,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 19:20:51,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:51,866 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 19:20:51,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:51,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 19:20:51,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49713808] [2021-01-06 19:20:51,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 19:20:51,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:51,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 19:20:51,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:51,869 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 16 states. [2021-01-06 19:20:52,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:52,024 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 19:20:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 19:20:52,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2021-01-06 19:20:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:52,027 INFO L225 Difference]: With dead ends: 34 [2021-01-06 19:20:52,027 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 19:20:52,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-01-06 19:20:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 19:20:52,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-01-06 19:20:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 19:20:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-01-06 19:20:52,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2021-01-06 19:20:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:52,035 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-01-06 19:20:52,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 19:20:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-01-06 19:20:52,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 19:20:52,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:52,037 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:52,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:20:52,251 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:52,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:52,252 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2021-01-06 19:20:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:52,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294341791] [2021-01-06 19:20:52,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:52,788 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 19:20:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294341791] [2021-01-06 19:20:52,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855976317] [2021-01-06 19:20:52,789 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 19:20:52,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 19:20:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:52,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 19:20:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:53,102 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 19:20:53,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:53,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 19:20:53,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942742405] [2021-01-06 19:20:53,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:20:53,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:53,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:20:53,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:20:53,105 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 18 states. [2021-01-06 19:20:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:53,293 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-01-06 19:20:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 19:20:53,294 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2021-01-06 19:20:53,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:53,296 INFO L225 Difference]: With dead ends: 37 [2021-01-06 19:20:53,296 INFO L226 Difference]: Without dead ends: 33 [2021-01-06 19:20:53,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:20:53,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-01-06 19:20:53,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-01-06 19:20:53,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 19:20:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-01-06 19:20:53,303 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2021-01-06 19:20:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:53,303 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-01-06 19:20:53,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:20:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-01-06 19:20:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-01-06 19:20:53,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:53,305 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:53,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:53,519 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:53,520 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2021-01-06 19:20:53,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:53,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254533534] [2021-01-06 19:20:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:53,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,140 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 19:20:54,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254533534] [2021-01-06 19:20:54,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205413134] [2021-01-06 19:20:54,141 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 19:20:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:54,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 19:20:54,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:54,455 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 19:20:54,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:54,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 19:20:54,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809788352] [2021-01-06 19:20:54,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 19:20:54,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:54,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 19:20:54,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:20:54,458 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 20 states. [2021-01-06 19:20:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:54,695 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-01-06 19:20:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 19:20:54,696 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2021-01-06 19:20:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:54,698 INFO L225 Difference]: With dead ends: 40 [2021-01-06 19:20:54,698 INFO L226 Difference]: Without dead ends: 36 [2021-01-06 19:20:54,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2021-01-06 19:20:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-06 19:20:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-01-06 19:20:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 19:20:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-01-06 19:20:54,705 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2021-01-06 19:20:54,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:54,705 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-01-06 19:20:54,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 19:20:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-01-06 19:20:54,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 19:20:54,707 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:54,707 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:54,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:54,922 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:54,923 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2021-01-06 19:20:54,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:54,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443548996] [2021-01-06 19:20:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,402 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 19:20:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,577 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 19:20:55,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:55,754 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 19:20:55,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443548996] [2021-01-06 19:20:55,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739264009] [2021-01-06 19:20:55,755 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 19:20:55,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:20:55,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 19:20:55,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:56,070 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 19:20:56,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:56,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 19:20:56,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222540671] [2021-01-06 19:20:56,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 19:20:56,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 19:20:56,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:20:56,073 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 22 states. [2021-01-06 19:20:56,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:56,382 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-01-06 19:20:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 19:20:56,384 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2021-01-06 19:20:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:56,385 INFO L225 Difference]: With dead ends: 43 [2021-01-06 19:20:56,385 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 19:20:56,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-01-06 19:20:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 19:20:56,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-01-06 19:20:56,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 19:20:56,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-01-06 19:20:56,393 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2021-01-06 19:20:56,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:56,393 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-01-06 19:20:56,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 19:20:56,393 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-01-06 19:20:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 19:20:56,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:56,395 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:56,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:20:56,611 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2021-01-06 19:20:56,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:56,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187207861] [2021-01-06 19:20:56,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:56,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:57,651 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 19:20:57,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187207861] [2021-01-06 19:20:57,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809814438] [2021-01-06 19:20:57,652 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 19:20:57,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 19:20:57,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:57,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 19:20:57,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:20:58,042 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 19:20:58,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:20:58,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 19:20:58,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747094793] [2021-01-06 19:20:58,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 19:20:58,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:20:58,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 19:20:58,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:58,045 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 24 states. [2021-01-06 19:20:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:20:58,413 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-01-06 19:20:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 19:20:58,413 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2021-01-06 19:20:58,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:20:58,415 INFO L225 Difference]: With dead ends: 46 [2021-01-06 19:20:58,415 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 19:20:58,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:20:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 19:20:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-01-06 19:20:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 19:20:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-01-06 19:20:58,422 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2021-01-06 19:20:58,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:20:58,423 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-01-06 19:20:58,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 19:20:58,423 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-01-06 19:20:58,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 19:20:58,424 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:20:58,424 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:20:58,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:20:58,638 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:20:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:20:58,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2021-01-06 19:20:58,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:20:58,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029260099] [2021-01-06 19:20:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:20:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:58,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:20:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:20:59,714 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 19:20:59,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029260099] [2021-01-06 19:20:59,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344167749] [2021-01-06 19:20:59,715 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 19:20:59,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:20:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:20:59,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 19:20:59,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:00,111 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 19:21:00,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:00,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 19:21:00,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946473440] [2021-01-06 19:21:00,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 19:21:00,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:00,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 19:21:00,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:21:00,114 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 26 states. [2021-01-06 19:21:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:00,567 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-01-06 19:21:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 19:21:00,568 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 70 [2021-01-06 19:21:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:00,569 INFO L225 Difference]: With dead ends: 49 [2021-01-06 19:21:00,569 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 19:21:00,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:21:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 19:21:00,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 19:21:00,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 19:21:00,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-01-06 19:21:00,577 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 70 [2021-01-06 19:21:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:00,577 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-01-06 19:21:00,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 19:21:00,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-01-06 19:21:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-01-06 19:21:00,579 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:00,579 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:00,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:00,793 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:00,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:00,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1354232598, now seen corresponding path program 11 times [2021-01-06 19:21:00,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:00,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146563098] [2021-01-06 19:21:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:00,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:01,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:02,000 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 19:21:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146563098] [2021-01-06 19:21:02,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771650644] [2021-01-06 19:21:02,001 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 19:21:02,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 19:21:02,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 19:21:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:02,563 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 19:21:02,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:02,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 19:21:02,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770302453] [2021-01-06 19:21:02,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 19:21:02,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:02,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 19:21:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:21:02,566 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 28 states. [2021-01-06 19:21:03,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:03,094 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-01-06 19:21:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 19:21:03,095 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2021-01-06 19:21:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:03,097 INFO L225 Difference]: With dead ends: 52 [2021-01-06 19:21:03,097 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 19:21:03,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-01-06 19:21:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 19:21:03,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-01-06 19:21:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 19:21:03,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-01-06 19:21:03,105 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 76 [2021-01-06 19:21:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:03,106 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-01-06 19:21:03,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 19:21:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-01-06 19:21:03,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 19:21:03,107 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:03,107 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:03,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 19:21:03,316 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:03,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:03,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1734686668, now seen corresponding path program 12 times [2021-01-06 19:21:03,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:03,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831740775] [2021-01-06 19:21:03,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:03,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:04,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:04,659 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 19:21:04,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831740775] [2021-01-06 19:21:04,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269050665] [2021-01-06 19:21:04,659 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 19:21:04,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 19:21:04,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:04,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 19:21:04,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:05,236 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 19:21:05,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:05,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 19:21:05,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175191073] [2021-01-06 19:21:05,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 19:21:05,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 19:21:05,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:21:05,239 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 30 states. [2021-01-06 19:21:05,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:05,862 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-01-06 19:21:05,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 19:21:05,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 82 [2021-01-06 19:21:05,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:05,865 INFO L225 Difference]: With dead ends: 55 [2021-01-06 19:21:05,865 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 19:21:05,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-01-06 19:21:05,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 19:21:05,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-06 19:21:05,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 19:21:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-01-06 19:21:05,872 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 82 [2021-01-06 19:21:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:05,872 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-01-06 19:21:05,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 19:21:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-01-06 19:21:05,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-01-06 19:21:05,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:05,874 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:06,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 19:21:06,078 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1433749930, now seen corresponding path program 13 times [2021-01-06 19:21:06,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:06,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065904956] [2021-01-06 19:21:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:06,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:06,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:07,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:07,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:07,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:07,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:07,552 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 19:21:07,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065904956] [2021-01-06 19:21:07,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649482397] [2021-01-06 19:21:07,554 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 19:21:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:07,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 19:21:07,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:07,964 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 19:21:07,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:07,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 19:21:07,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935541800] [2021-01-06 19:21:07,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 19:21:07,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 19:21:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-01-06 19:21:07,967 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 32 states. [2021-01-06 19:21:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:08,743 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-01-06 19:21:08,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 19:21:08,744 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 88 [2021-01-06 19:21:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:08,745 INFO L225 Difference]: With dead ends: 58 [2021-01-06 19:21:08,745 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 19:21:08,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2021-01-06 19:21:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 19:21:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-01-06 19:21:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 19:21:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-01-06 19:21:08,753 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 88 [2021-01-06 19:21:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:08,753 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-01-06 19:21:08,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 19:21:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-01-06 19:21:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 19:21:08,754 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:08,755 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:08,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 19:21:08,970 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1321174388, now seen corresponding path program 14 times [2021-01-06 19:21:08,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:08,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227904831] [2021-01-06 19:21:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:09,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:10,731 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 19:21:10,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227904831] [2021-01-06 19:21:10,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983410914] [2021-01-06 19:21:10,731 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 19:21:10,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:10,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:10,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 19:21:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:11,221 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 19:21:11,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:11,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 19:21:11,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772428192] [2021-01-06 19:21:11,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 19:21:11,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:11,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 19:21:11,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:21:11,227 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 34 states. [2021-01-06 19:21:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:12,039 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-01-06 19:21:12,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 19:21:12,040 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 94 [2021-01-06 19:21:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:12,041 INFO L225 Difference]: With dead ends: 61 [2021-01-06 19:21:12,041 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 19:21:12,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 19:21:12,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 19:21:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-01-06 19:21:12,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 19:21:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-01-06 19:21:12,049 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 94 [2021-01-06 19:21:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:12,049 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-01-06 19:21:12,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 19:21:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-01-06 19:21:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 19:21:12,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:12,050 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:12,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:12,264 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:12,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:12,265 INFO L82 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 15 times [2021-01-06 19:21:12,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:12,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251854339] [2021-01-06 19:21:12,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:12,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:13,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:14,124 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 19:21:14,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251854339] [2021-01-06 19:21:14,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78005263] [2021-01-06 19:21:14,125 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 19:21:14,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 19:21:14,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 19:21:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:14,949 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 19:21:14,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:14,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 19:21:14,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243255197] [2021-01-06 19:21:14,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 19:21:14,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:14,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 19:21:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 19:21:14,951 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 36 states. [2021-01-06 19:21:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:15,913 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2021-01-06 19:21:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 19:21:15,914 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2021-01-06 19:21:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:15,915 INFO L225 Difference]: With dead ends: 64 [2021-01-06 19:21:15,915 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 19:21:15,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 19:21:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 19:21:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-01-06 19:21:15,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 19:21:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-01-06 19:21:15,924 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 100 [2021-01-06 19:21:15,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:15,925 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-01-06 19:21:15,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 19:21:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-01-06 19:21:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 19:21:15,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:15,926 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:16,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 19:21:16,133 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash 317812044, now seen corresponding path program 16 times [2021-01-06 19:21:16,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:16,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079393774] [2021-01-06 19:21:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:17,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:18,291 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 19:21:18,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079393774] [2021-01-06 19:21:18,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098772420] [2021-01-06 19:21:18,291 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 19:21:18,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:18,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:18,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 19:21:18,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:18,777 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 19:21:18,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:18,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 19:21:18,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435959455] [2021-01-06 19:21:18,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 19:21:18,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:18,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 19:21:18,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:21:18,780 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 38 states. [2021-01-06 19:21:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:19,906 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-01-06 19:21:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 19:21:19,907 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 106 [2021-01-06 19:21:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:19,909 INFO L225 Difference]: With dead ends: 67 [2021-01-06 19:21:19,909 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 19:21:19,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 19:21:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 19:21:19,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-01-06 19:21:19,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 19:21:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-01-06 19:21:19,928 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 106 [2021-01-06 19:21:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:19,928 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-01-06 19:21:19,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 19:21:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-01-06 19:21:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-01-06 19:21:19,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:19,930 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:20,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 19:21:20,131 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash -2122437418, now seen corresponding path program 17 times [2021-01-06 19:21:20,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:20,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304278618] [2021-01-06 19:21:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:20,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:21,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:21,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:22,479 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 19:21:22,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304278618] [2021-01-06 19:21:22,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744044810] [2021-01-06 19:21:22,480 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 19:21:26,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 19:21:26,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:26,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 19:21:26,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:27,121 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 19:21:27,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:27,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 19:21:27,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607300862] [2021-01-06 19:21:27,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 19:21:27,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 19:21:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 19:21:27,123 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 40 states. [2021-01-06 19:21:28,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:28,355 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2021-01-06 19:21:28,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 19:21:28,356 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 112 [2021-01-06 19:21:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:28,360 INFO L225 Difference]: With dead ends: 70 [2021-01-06 19:21:28,360 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 19:21:28,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 19:21:28,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 19:21:28,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-01-06 19:21:28,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 19:21:28,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2021-01-06 19:21:28,372 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 112 [2021-01-06 19:21:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:28,374 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2021-01-06 19:21:28,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 19:21:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2021-01-06 19:21:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 19:21:28,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:28,378 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:28,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 19:21:28,579 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:28,580 INFO L82 PathProgramCache]: Analyzing trace with hash 55840780, now seen corresponding path program 18 times [2021-01-06 19:21:28,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:28,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385140903] [2021-01-06 19:21:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:28,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:28,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:29,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:30,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:31,227 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 19:21:31,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385140903] [2021-01-06 19:21:31,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011258910] [2021-01-06 19:21:31,227 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 19:21:31,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 19:21:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 19:21:32,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:32,417 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 19:21:32,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:32,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 19:21:32,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666870821] [2021-01-06 19:21:32,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 19:21:32,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:32,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 19:21:32,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 19:21:32,420 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 42 states. [2021-01-06 19:21:33,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:33,729 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2021-01-06 19:21:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 19:21:33,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 118 [2021-01-06 19:21:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:33,732 INFO L225 Difference]: With dead ends: 73 [2021-01-06 19:21:33,732 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 19:21:33,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 19:21:33,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 19:21:33,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-01-06 19:21:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 19:21:33,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-01-06 19:21:33,738 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 118 [2021-01-06 19:21:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:33,739 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-01-06 19:21:33,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 19:21:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-01-06 19:21:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 19:21:33,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:33,740 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:33,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:33,945 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:33,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash -806952938, now seen corresponding path program 19 times [2021-01-06 19:21:33,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:33,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108938070] [2021-01-06 19:21:33,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:34,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:35,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:36,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:37,025 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 19:21:37,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108938070] [2021-01-06 19:21:37,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790484129] [2021-01-06 19:21:37,025 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 19:21:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 84 conjunts are in the unsatisfiable core [2021-01-06 19:21:37,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:37,574 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 19:21:37,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:37,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 19:21:37,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798100898] [2021-01-06 19:21:37,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 19:21:37,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:37,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 19:21:37,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 19:21:37,578 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 44 states. [2021-01-06 19:21:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:39,123 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-01-06 19:21:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 19:21:39,124 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 124 [2021-01-06 19:21:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:39,126 INFO L225 Difference]: With dead ends: 76 [2021-01-06 19:21:39,126 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 19:21:39,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 19:21:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 19:21:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-01-06 19:21:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 19:21:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-01-06 19:21:39,132 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 124 [2021-01-06 19:21:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:39,132 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-01-06 19:21:39,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 19:21:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-01-06 19:21:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 19:21:39,133 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:39,134 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:39,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:39,341 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:39,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:39,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1807457588, now seen corresponding path program 20 times [2021-01-06 19:21:39,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:39,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295611817] [2021-01-06 19:21:39,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:39,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:40,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:41,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:42,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:42,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:42,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:42,780 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 19:21:42,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295611817] [2021-01-06 19:21:42,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707014521] [2021-01-06 19:21:42,781 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 19:21:42,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:21:42,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 88 conjunts are in the unsatisfiable core [2021-01-06 19:21:42,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:43,450 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 19:21:43,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:43,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 19:21:43,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773885626] [2021-01-06 19:21:43,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 19:21:43,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:43,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 19:21:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 19:21:43,453 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 46 states. [2021-01-06 19:21:45,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:45,088 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-01-06 19:21:45,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 19:21:45,089 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 130 [2021-01-06 19:21:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:45,091 INFO L225 Difference]: With dead ends: 79 [2021-01-06 19:21:45,091 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 19:21:45,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 19:21:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 19:21:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-01-06 19:21:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 19:21:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-01-06 19:21:45,098 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 130 [2021-01-06 19:21:45,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:45,099 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-01-06 19:21:45,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 19:21:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-01-06 19:21:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 19:21:45,101 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:45,101 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:45,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 19:21:45,315 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:45,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:45,316 INFO L82 PathProgramCache]: Analyzing trace with hash 874439510, now seen corresponding path program 21 times [2021-01-06 19:21:45,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:45,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800544101] [2021-01-06 19:21:45,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:45,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:45,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:45,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:45,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:45,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:45,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:46,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:46,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:46,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:46,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:46,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:46,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:46,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:47,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:48,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:49,191 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 19:21:49,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800544101] [2021-01-06 19:21:49,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349146679] [2021-01-06 19:21:49,192 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 19:21:50,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 19:21:50,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 92 conjunts are in the unsatisfiable core [2021-01-06 19:21:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:50,653 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 19:21:50,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:50,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 19:21:50,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138930807] [2021-01-06 19:21:50,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 19:21:50,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 19:21:50,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:21:50,656 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 48 states. [2021-01-06 19:21:52,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:52,443 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-01-06 19:21:52,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 19:21:52,446 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 136 [2021-01-06 19:21:52,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:52,447 INFO L225 Difference]: With dead ends: 82 [2021-01-06 19:21:52,448 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 19:21:52,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 19:21:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 19:21:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-01-06 19:21:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 19:21:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2021-01-06 19:21:52,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 136 [2021-01-06 19:21:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:52,454 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2021-01-06 19:21:52,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 19:21:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2021-01-06 19:21:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-01-06 19:21:52,455 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:52,456 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:52,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 19:21:52,664 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:52,665 INFO L82 PathProgramCache]: Analyzing trace with hash 849241484, now seen corresponding path program 22 times [2021-01-06 19:21:52,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:52,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494987983] [2021-01-06 19:21:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:52,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:52,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:52,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:53,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:54,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:55,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:56,513 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 19:21:56,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494987983] [2021-01-06 19:21:56,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130814767] [2021-01-06 19:21:56,514 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 19:21:56,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:21:56,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:21:56,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 96 conjunts are in the unsatisfiable core [2021-01-06 19:21:56,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:21:57,176 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 19:21:57,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:21:57,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 19:21:57,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535575296] [2021-01-06 19:21:57,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 19:21:57,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:21:57,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 19:21:57,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 19:21:57,179 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 50 states. [2021-01-06 19:21:59,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:21:59,190 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-01-06 19:21:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 19:21:59,193 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 142 [2021-01-06 19:21:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:21:59,194 INFO L225 Difference]: With dead ends: 85 [2021-01-06 19:21:59,194 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 19:21:59,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 19:21:59,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 19:21:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-01-06 19:21:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 19:21:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2021-01-06 19:21:59,201 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 142 [2021-01-06 19:21:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:21:59,201 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2021-01-06 19:21:59,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 19:21:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2021-01-06 19:21:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-01-06 19:21:59,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:21:59,203 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:21:59,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:21:59,418 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:21:59,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:21:59,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1665808022, now seen corresponding path program 23 times [2021-01-06 19:21:59,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:21:59,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136229344] [2021-01-06 19:21:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:21:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:21:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:21:59,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:00,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:01,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:02,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:02,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:02,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:02,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:03,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:03,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:03,804 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 19:22:03,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136229344] [2021-01-06 19:22:03,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371003277] [2021-01-06 19:22:03,804 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 19:22:09,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 19:22:09,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:09,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 100 conjunts are in the unsatisfiable core [2021-01-06 19:22:09,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:10,082 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 19:22:10,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:10,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 19:22:10,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586393218] [2021-01-06 19:22:10,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 19:22:10,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 19:22:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 19:22:10,084 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 52 states. [2021-01-06 19:22:12,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:12,242 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-01-06 19:22:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 19:22:12,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 148 [2021-01-06 19:22:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:12,245 INFO L225 Difference]: With dead ends: 88 [2021-01-06 19:22:12,245 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 19:22:12,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 19:22:12,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 19:22:12,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-01-06 19:22:12,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 19:22:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2021-01-06 19:22:12,252 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 148 [2021-01-06 19:22:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:12,253 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2021-01-06 19:22:12,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 19:22:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2021-01-06 19:22:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 19:22:12,254 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:12,254 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:12,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 19:22:12,455 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:12,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1715345484, now seen corresponding path program 24 times [2021-01-06 19:22:12,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:12,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034832269] [2021-01-06 19:22:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:12,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:12,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:13,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:14,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:14,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:14,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:14,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:14,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:15,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:15,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:15,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:15,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:15,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:16,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:17,155 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 19:22:17,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034832269] [2021-01-06 19:22:17,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752804930] [2021-01-06 19:22:17,156 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 19:22:18,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 19:22:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 106 conjunts are in the unsatisfiable core [2021-01-06 19:22:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:18,832 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 19:22:18,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:18,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 19:22:18,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300308432] [2021-01-06 19:22:18,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 19:22:18,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:18,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 19:22:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 19:22:18,835 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 54 states. [2021-01-06 19:22:21,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:21,223 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2021-01-06 19:22:21,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 19:22:21,224 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 154 [2021-01-06 19:22:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:21,226 INFO L225 Difference]: With dead ends: 91 [2021-01-06 19:22:21,226 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 19:22:21,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 19:22:21,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 19:22:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-01-06 19:22:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-01-06 19:22:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2021-01-06 19:22:21,232 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 154 [2021-01-06 19:22:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:21,232 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2021-01-06 19:22:21,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 19:22:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2021-01-06 19:22:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-01-06 19:22:21,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:21,234 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:21,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:22:21,440 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash -678635050, now seen corresponding path program 25 times [2021-01-06 19:22:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:21,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695072682] [2021-01-06 19:22:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:21,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:21,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:21,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:21,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:21,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:22,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:23,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:23,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:24,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:25,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:25,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:26,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:26,845 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 19:22:26,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695072682] [2021-01-06 19:22:26,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383922107] [2021-01-06 19:22:26,846 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 19:22:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:27,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 108 conjunts are in the unsatisfiable core [2021-01-06 19:22:27,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:27,605 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 19:22:27,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:27,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 19:22:27,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377132215] [2021-01-06 19:22:27,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 19:22:27,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:27,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 19:22:27,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 19:22:27,608 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 56 states. [2021-01-06 19:22:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:30,150 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2021-01-06 19:22:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 19:22:30,152 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 160 [2021-01-06 19:22:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:30,153 INFO L225 Difference]: With dead ends: 94 [2021-01-06 19:22:30,153 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 19:22:30,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 19:22:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 19:22:30,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-01-06 19:22:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 19:22:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2021-01-06 19:22:30,160 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 160 [2021-01-06 19:22:30,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:30,160 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2021-01-06 19:22:30,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 19:22:30,160 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2021-01-06 19:22:30,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 19:22:30,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:30,162 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:30,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 19:22:30,377 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:30,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:30,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1845527796, now seen corresponding path program 26 times [2021-01-06 19:22:30,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:30,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722723123] [2021-01-06 19:22:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:30,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:30,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:30,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:30,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:30,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:31,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:31,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:31,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:31,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:31,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:31,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:31,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:32,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:32,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:32,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:32,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:32,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:33,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:33,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:33,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:33,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:34,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:34,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:34,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:34,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:35,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 19:22:35,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722723123] [2021-01-06 19:22:35,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369956992] [2021-01-06 19:22:35,855 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 19:22:36,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:22:36,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:36,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 114 conjunts are in the unsatisfiable core [2021-01-06 19:22:36,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-01-06 19:22:36,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:36,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 19:22:36,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777873920] [2021-01-06 19:22:36,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 19:22:36,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 19:22:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 19:22:36,682 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 58 states. [2021-01-06 19:22:39,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:39,476 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2021-01-06 19:22:39,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 19:22:39,477 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 166 [2021-01-06 19:22:39,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:39,479 INFO L225 Difference]: With dead ends: 97 [2021-01-06 19:22:39,479 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 19:22:39,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 19:22:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 19:22:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-01-06 19:22:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 19:22:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-01-06 19:22:39,495 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 166 [2021-01-06 19:22:39,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:39,495 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-01-06 19:22:39,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 19:22:39,495 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-01-06 19:22:39,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-01-06 19:22:39,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:39,497 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:39,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 19:22:39,713 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:39,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 269143318, now seen corresponding path program 27 times [2021-01-06 19:22:39,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:39,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053012868] [2021-01-06 19:22:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:39,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:39,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:39,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:40,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:40,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:40,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:40,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:40,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:40,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:40,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:40,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:41,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:41,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:41,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:41,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:41,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:42,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:42,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:42,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:42,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:42,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:43,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:43,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:43,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:43,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:44,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:45,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-01-06 19:22:45,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053012868] [2021-01-06 19:22:45,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683934681] [2021-01-06 19:22:45,650 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:22:46,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 19:22:46,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 116 conjunts are in the unsatisfiable core [2021-01-06 19:22:46,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2021-01-06 19:22:47,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:47,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 19:22:47,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474104157] [2021-01-06 19:22:47,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 19:22:47,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:47,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 19:22:47,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 19:22:47,612 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 60 states. [2021-01-06 19:22:50,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:22:50,591 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-01-06 19:22:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 19:22:50,592 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 172 [2021-01-06 19:22:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:22:50,593 INFO L225 Difference]: With dead ends: 100 [2021-01-06 19:22:50,593 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 19:22:50,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 19:22:50,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 19:22:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-01-06 19:22:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2021-01-06 19:22:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2021-01-06 19:22:50,601 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 172 [2021-01-06 19:22:50,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:22:50,603 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2021-01-06 19:22:50,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 19:22:50,603 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2021-01-06 19:22:50,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 19:22:50,605 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:22:50,605 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:22:50,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 19:22:50,809 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:22:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:22:50,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1279357492, now seen corresponding path program 28 times [2021-01-06 19:22:50,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:22:50,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459061579] [2021-01-06 19:22:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:22:50,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:50,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:51,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:52,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:52,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:52,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:52,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:52,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:52,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:52,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:53,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:53,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:53,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:53,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:54,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:54,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:54,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:54,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:55,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:56,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:22:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:22:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-01-06 19:22:57,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459061579] [2021-01-06 19:22:57,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475002482] [2021-01-06 19:22:57,059 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:22:57,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:22:57,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:22:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 120 conjunts are in the unsatisfiable core [2021-01-06 19:22:57,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:22:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-01-06 19:22:57,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:22:57,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 19:22:57,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404764242] [2021-01-06 19:22:57,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 19:22:57,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:22:57,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 19:22:57,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 19:22:57,948 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 62 states. [2021-01-06 19:23:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:23:01,189 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2021-01-06 19:23:01,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 19:23:01,190 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 178 [2021-01-06 19:23:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:23:01,192 INFO L225 Difference]: With dead ends: 103 [2021-01-06 19:23:01,192 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 19:23:01,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 19:23:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 19:23:01,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-01-06 19:23:01,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 19:23:01,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2021-01-06 19:23:01,198 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 178 [2021-01-06 19:23:01,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:23:01,198 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2021-01-06 19:23:01,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 19:23:01,198 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2021-01-06 19:23:01,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-01-06 19:23:01,199 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:23:01,200 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:23:01,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 19:23:01,408 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:23:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:23:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash -790097834, now seen corresponding path program 29 times [2021-01-06 19:23:01,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:23:01,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9872568] [2021-01-06 19:23:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:23:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:01,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:01,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:01,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:01,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:01,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:02,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:02,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:02,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:02,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:02,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:02,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:03,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:03,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:03,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:03,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:03,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:04,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:05,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:06,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:07,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 19:23:08,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9872568] [2021-01-06 19:23:08,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377096238] [2021-01-06 19:23:08,262 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:23:35,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 19:23:35,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:23:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 124 conjunts are in the unsatisfiable core [2021-01-06 19:23:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:23:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 19:23:36,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:23:36,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 19:23:36,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086273170] [2021-01-06 19:23:36,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 19:23:36,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:23:36,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 19:23:36,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 19:23:36,501 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 64 states. [2021-01-06 19:23:39,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:23:39,890 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-01-06 19:23:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 19:23:39,891 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 184 [2021-01-06 19:23:39,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:23:39,892 INFO L225 Difference]: With dead ends: 106 [2021-01-06 19:23:39,893 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 19:23:39,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 19:23:39,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 19:23:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-01-06 19:23:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 19:23:39,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-01-06 19:23:39,899 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 184 [2021-01-06 19:23:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:23:39,900 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-01-06 19:23:39,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 19:23:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-01-06 19:23:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 19:23:39,901 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:23:39,901 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:23:40,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:23:40,102 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:23:40,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:23:40,103 INFO L82 PathProgramCache]: Analyzing trace with hash 609702028, now seen corresponding path program 30 times [2021-01-06 19:23:40,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:23:40,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800303967] [2021-01-06 19:23:40,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:23:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:40,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:41,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:41,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:42,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:43,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:44,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:45,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:45,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:46,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:23:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:23:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-01-06 19:23:47,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800303967] [2021-01-06 19:23:47,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350466594] [2021-01-06 19:23:47,104 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:23:57,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 19:23:57,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:23:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 128 conjunts are in the unsatisfiable core [2021-01-06 19:23:57,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:23:57,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2730 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2021-01-06 19:23:57,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:23:57,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 19:23:57,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284312109] [2021-01-06 19:23:57,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 19:23:57,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:23:57,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 19:23:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 19:23:57,909 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand 66 states. [2021-01-06 19:24:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:24:01,548 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-01-06 19:24:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 19:24:01,549 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 190 [2021-01-06 19:24:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:24:01,550 INFO L225 Difference]: With dead ends: 109 [2021-01-06 19:24:01,551 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 19:24:01,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 19:24:01,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 19:24:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-01-06 19:24:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2021-01-06 19:24:01,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2021-01-06 19:24:01,555 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 190 [2021-01-06 19:24:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:24:01,555 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2021-01-06 19:24:01,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 19:24:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2021-01-06 19:24:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-01-06 19:24:01,556 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:24:01,557 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:24:01,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:24:01,758 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:24:01,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:24:01,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 31 times [2021-01-06 19:24:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:24:01,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622523407] [2021-01-06 19:24:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:24:01,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:01,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:01,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:02,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:02,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:02,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:02,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:02,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:02,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:02,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:03,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:03,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:03,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:03,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:03,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:04,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:04,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:04,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:04,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:04,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:05,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:05,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:05,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:05,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:05,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:06,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:06,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:07,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:07,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:07,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:07,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:08,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:08,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:08,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-01-06 19:24:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622523407] [2021-01-06 19:24:09,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143913412] [2021-01-06 19:24:09,281 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:24:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:09,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 132 conjunts are in the unsatisfiable core [2021-01-06 19:24:09,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:24:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-01-06 19:24:10,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:24:10,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 19:24:10,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348491982] [2021-01-06 19:24:10,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 19:24:10,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:24:10,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 19:24:10,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 19:24:10,233 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 68 states. [2021-01-06 19:24:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:24:14,082 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2021-01-06 19:24:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 19:24:14,083 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 196 [2021-01-06 19:24:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:24:14,085 INFO L225 Difference]: With dead ends: 112 [2021-01-06 19:24:14,085 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 19:24:14,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=134, Invalid=4422, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 19:24:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 19:24:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-01-06 19:24:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 19:24:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2021-01-06 19:24:14,090 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 196 [2021-01-06 19:24:14,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:24:14,091 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2021-01-06 19:24:14,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 19:24:14,091 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2021-01-06 19:24:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 19:24:14,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:24:14,093 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:24:14,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:24:14,306 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:24:14,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:24:14,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1470481228, now seen corresponding path program 32 times [2021-01-06 19:24:14,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:24:14,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918105218] [2021-01-06 19:24:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:24:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:14,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:14,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:14,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:14,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:14,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:15,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:15,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:15,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:15,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:15,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:15,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:15,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:16,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:16,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:16,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:16,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:16,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:17,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:17,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:17,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:17,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:18,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:18,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:18,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:19,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:19,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:19,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:19,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:19,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:20,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:20,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:21,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:21,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:21,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-01-06 19:24:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918105218] [2021-01-06 19:24:22,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963949074] [2021-01-06 19:24:22,350 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:24:22,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:24:22,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:24:22,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 136 conjunts are in the unsatisfiable core [2021-01-06 19:24:22,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:24:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2021-01-06 19:24:23,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:24:23,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 19:24:23,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931043391] [2021-01-06 19:24:23,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 19:24:23,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:24:23,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 19:24:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 19:24:23,343 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 70 states. [2021-01-06 19:24:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:24:27,387 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2021-01-06 19:24:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 19:24:27,388 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 202 [2021-01-06 19:24:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:24:27,390 INFO L225 Difference]: With dead ends: 115 [2021-01-06 19:24:27,390 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 19:24:27,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=138, Invalid=4692, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 19:24:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 19:24:27,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-01-06 19:24:27,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 19:24:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2021-01-06 19:24:27,400 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 202 [2021-01-06 19:24:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:24:27,401 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2021-01-06 19:24:27,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 19:24:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2021-01-06 19:24:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-01-06 19:24:27,402 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:24:27,403 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:24:27,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 19:24:27,617 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:24:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:24:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash -716142890, now seen corresponding path program 33 times [2021-01-06 19:24:27,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:24:27,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092668932] [2021-01-06 19:24:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:24:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:27,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:27,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:27,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:28,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:28,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:28,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:28,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:28,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:29,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:29,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:29,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:29,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:29,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:29,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:30,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:31,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:32,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:33,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:34,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:35,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2021-01-06 19:24:36,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092668932] [2021-01-06 19:24:36,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559427794] [2021-01-06 19:24:36,046 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:24:39,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 19:24:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:24:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 140 conjunts are in the unsatisfiable core [2021-01-06 19:24:39,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:24:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2021-01-06 19:24:40,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:24:40,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 19:24:40,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109491252] [2021-01-06 19:24:40,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 19:24:40,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:24:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 19:24:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 19:24:40,810 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 72 states. [2021-01-06 19:24:44,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:24:44,944 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2021-01-06 19:24:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 19:24:44,945 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 208 [2021-01-06 19:24:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:24:44,948 INFO L225 Difference]: With dead ends: 118 [2021-01-06 19:24:44,948 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 19:24:44,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=142, Invalid=4970, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 19:24:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 19:24:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-01-06 19:24:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2021-01-06 19:24:44,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2021-01-06 19:24:44,955 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 208 [2021-01-06 19:24:44,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:24:44,956 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2021-01-06 19:24:44,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 19:24:44,956 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2021-01-06 19:24:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-01-06 19:24:44,957 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:24:44,957 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:24:45,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:24:45,162 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:24:45,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:24:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1668946420, now seen corresponding path program 34 times [2021-01-06 19:24:45,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:24:45,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569943604] [2021-01-06 19:24:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:24:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:45,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:45,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:45,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:45,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:45,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:45,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:46,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:46,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:46,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:46,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:46,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:46,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:47,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:47,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:47,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:47,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:47,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:47,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:47,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:47,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:48,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:48,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:48,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:48,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:48,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:49,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:49,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:24:49,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-01-06 19:24:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat