/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/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:15:07,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:15:07,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:15:07,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:15:07,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:15:07,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:15:07,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:15:07,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:15:07,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:15:07,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:15:07,499 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:15:07,501 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:15:07,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:15:07,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:15:07,504 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:15:07,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:15:07,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:15:07,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:15:07,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:15:07,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:15:07,529 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:15:07,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:15:07,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:15:07,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:15:07,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 19:15:07,536 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 19:15:07,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 19:15:07,538 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 19:15:07,538 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 19:15:07,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 19:15:07,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:15:07,540 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:15:07,541 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:15:07,542 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:15:07,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:15:07,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:15:07,545 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:15:07,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:15:07,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:15:07,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:15:07,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:15:07,548 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 19:15:07,587 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:15:07,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:15:07,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:15:07,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:15:07,592 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:15:07,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:15:07,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:15:07,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:15:07,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:15:07,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:15:07,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:15:07,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:15:07,595 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:15:07,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:15:07,596 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:15:07,596 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:15:07,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:15:07,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:15:07,597 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:15:07,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:15:07,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:15:07,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:15:07,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:15:07,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:15:07,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:15:07,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:15:08,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:15:08,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:15:08,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:15:08,050 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:15:08,051 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:15:08,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2021-01-06 19:15:08,142 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07238d3b2/fc0b6b029b164d67b39490a8a2888700/FLAGb0ee3d22c [2021-01-06 19:15:08,725 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:15:08,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2021-01-06 19:15:08,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07238d3b2/fc0b6b029b164d67b39490a8a2888700/FLAGb0ee3d22c [2021-01-06 19:15:09,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/07238d3b2/fc0b6b029b164d67b39490a8a2888700 [2021-01-06 19:15:09,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:15:09,123 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:15:09,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:15:09,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:15:09,129 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:15:09,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@352a54e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09, skipping insertion in model container [2021-01-06 19:15:09,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:15:09,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:15:09,309 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/Ackermann04.c[1166,1179] [2021-01-06 19:15:09,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:15:09,323 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:15:09,344 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/Ackermann04.c[1166,1179] [2021-01-06 19:15:09,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:15:09,360 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:15:09,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09 WrapperNode [2021-01-06 19:15:09,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:15:09,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:15:09,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:15:09,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:15:09,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:15:09,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:15:09,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:15:09,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:15:09,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,412 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (1/1) ... [2021-01-06 19:15:09,415 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:15:09,416 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:15:09,416 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:15:09,416 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:15:09,417 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (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 19:15:09,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:15:09,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:15:09,513 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-01-06 19:15:09,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-01-06 19:15:09,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:15:09,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:15:09,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:15:09,746 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:15:09,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:09 BoogieIcfgContainer [2021-01-06 19:15:09,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:15:09,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:15:09,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:15:09,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:15:09,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:15:09" (1/3) ... [2021-01-06 19:15:09,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6280c22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:15:09, skipping insertion in model container [2021-01-06 19:15:09,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:09" (2/3) ... [2021-01-06 19:15:09,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6280c22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:15:09, skipping insertion in model container [2021-01-06 19:15:09,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:09" (3/3) ... [2021-01-06 19:15:09,757 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2021-01-06 19:15:09,764 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:15:09,769 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:15:09,789 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:15:09,818 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:15:09,819 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:15:09,819 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:15:09,819 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:15:09,819 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:15:09,819 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:15:09,819 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:15:09,820 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:15:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 19:15:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 19:15:09,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:09,894 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:09,894 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:09,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2021-01-06 19:15:09,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:09,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019913259] [2021-01-06 19:15:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:10,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:10,231 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 19:15:10,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019913259] [2021-01-06 19:15:10,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 19:15:10,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 19:15:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383326007] [2021-01-06 19:15:10,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 19:15:10,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 19:15:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 19:15:10,261 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2021-01-06 19:15:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:10,367 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-01-06 19:15:10,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:15:10,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 19:15:10,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:10,380 INFO L225 Difference]: With dead ends: 51 [2021-01-06 19:15:10,380 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 19:15:10,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:15:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 19:15:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 19:15:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 19:15:10,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2021-01-06 19:15:10,435 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2021-01-06 19:15:10,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:10,436 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2021-01-06 19:15:10,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 19:15:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2021-01-06 19:15:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 19:15:10,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:10,439 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:10,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 19:15:10,440 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2021-01-06 19:15:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:10,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677640586] [2021-01-06 19:15:10,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:10,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:10,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:15:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677640586] [2021-01-06 19:15:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953849600] [2021-01-06 19:15:10,554 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 19:15:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 19:15:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:15:10,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:10,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 19:15:10,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126770504] [2021-01-06 19:15:10,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:15:10,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:15:10,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:15:10,767 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 8 states. [2021-01-06 19:15:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:10,888 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2021-01-06 19:15:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 19:15:10,889 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2021-01-06 19:15:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:10,892 INFO L225 Difference]: With dead ends: 49 [2021-01-06 19:15:10,892 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 19:15:10,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:15:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 19:15:10,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-01-06 19:15:10,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 19:15:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-01-06 19:15:10,904 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 19 [2021-01-06 19:15:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:10,905 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-01-06 19:15:10,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:15:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-01-06 19:15:10,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 19:15:10,908 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:10,908 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:11,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 19:15:11,124 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:11,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:11,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1893657534, now seen corresponding path program 1 times [2021-01-06 19:15:11,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:11,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908693458] [2021-01-06 19:15:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:11,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:11,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:11,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:11,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 19:15:11,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908693458] [2021-01-06 19:15:11,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409582587] [2021-01-06 19:15:11,294 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 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 19:15:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:11,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 19:15:11,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 19:15:11,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:11,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-01-06 19:15:11,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170378082] [2021-01-06 19:15:11,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 19:15:11,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 19:15:11,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-01-06 19:15:11,502 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 8 states. [2021-01-06 19:15:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:11,693 INFO L93 Difference]: Finished difference Result 74 states and 134 transitions. [2021-01-06 19:15:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 19:15:11,694 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-01-06 19:15:11,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:11,702 INFO L225 Difference]: With dead ends: 74 [2021-01-06 19:15:11,702 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 19:15:11,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:15:11,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 19:15:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-06 19:15:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 19:15:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2021-01-06 19:15:11,748 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 32 [2021-01-06 19:15:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:11,749 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2021-01-06 19:15:11,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 19:15:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2021-01-06 19:15:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 19:15:11,756 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:11,757 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:11,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:11,971 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:11,973 INFO L82 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 2 times [2021-01-06 19:15:11,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:11,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079598853] [2021-01-06 19:15:11,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:12,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:12,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 19:15:12,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079598853] [2021-01-06 19:15:12,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316292323] [2021-01-06 19:15:12,190 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 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 19:15:12,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:15:12,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 19:15:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-01-06 19:15:12,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:12,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-01-06 19:15:12,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120631842] [2021-01-06 19:15:12,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 19:15:12,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 19:15:12,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-01-06 19:15:12,368 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand 9 states. [2021-01-06 19:15:12,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:12,504 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-01-06 19:15:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 19:15:12,505 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2021-01-06 19:15:12,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:12,510 INFO L225 Difference]: With dead ends: 120 [2021-01-06 19:15:12,510 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 19:15:12,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-01-06 19:15:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 19:15:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-01-06 19:15:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 19:15:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2021-01-06 19:15:12,528 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2021-01-06 19:15:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:12,529 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2021-01-06 19:15:12,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 19:15:12,530 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2021-01-06 19:15:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 19:15:12,534 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:12,534 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:12,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:12,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash -749766204, now seen corresponding path program 3 times [2021-01-06 19:15:12,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:12,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752473657] [2021-01-06 19:15:12,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:12,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:13,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:13,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:13,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:13,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:13,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-01-06 19:15:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:13,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:13,141 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-01-06 19:15:13,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752473657] [2021-01-06 19:15:13,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601351989] [2021-01-06 19:15:13,143 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 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 19:15:13,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 19:15:13,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:13,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 19:15:13,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-01-06 19:15:13,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:13,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2021-01-06 19:15:13,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938299388] [2021-01-06 19:15:13,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:15:13,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:13,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:15:13,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:15:13,381 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand 18 states. [2021-01-06 19:15:13,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:13,959 INFO L93 Difference]: Finished difference Result 119 states and 222 transitions. [2021-01-06 19:15:13,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 19:15:13,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2021-01-06 19:15:13,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:13,962 INFO L225 Difference]: With dead ends: 119 [2021-01-06 19:15:13,962 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 19:15:13,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 19:15:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 19:15:13,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-01-06 19:15:13,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 19:15:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2021-01-06 19:15:13,977 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 79 [2021-01-06 19:15:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:13,977 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2021-01-06 19:15:13,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:15:13,978 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2021-01-06 19:15:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-01-06 19:15:13,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:13,982 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:14,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:14,197 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:14,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1092184431, now seen corresponding path program 4 times [2021-01-06 19:15:14,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:14,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899578419] [2021-01-06 19:15:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-01-06 19:15:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:14,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-01-06 19:15:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 305 proven. 238 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-01-06 19:15:14,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899578419] [2021-01-06 19:15:14,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618194402] [2021-01-06 19:15:14,836 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 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 19:15:14,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 19:15:14,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:14,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 19:15:14,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:15,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 268 proven. 468 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2021-01-06 19:15:15,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:15,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-01-06 19:15:15,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944187951] [2021-01-06 19:15:15,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 19:15:15,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:15,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 19:15:15,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:15:15,322 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 24 states. [2021-01-06 19:15:19,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:19,630 INFO L93 Difference]: Finished difference Result 183 states and 436 transitions. [2021-01-06 19:15:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 19:15:19,633 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 158 [2021-01-06 19:15:19,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:19,637 INFO L225 Difference]: With dead ends: 183 [2021-01-06 19:15:19,637 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 19:15:19,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1647, Invalid=8253, Unknown=0, NotChecked=0, Total=9900 [2021-01-06 19:15:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 19:15:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2021-01-06 19:15:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 19:15:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 160 transitions. [2021-01-06 19:15:19,708 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 160 transitions. Word has length 158 [2021-01-06 19:15:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:19,712 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 160 transitions. [2021-01-06 19:15:19,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 19:15:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 160 transitions. [2021-01-06 19:15:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 19:15:19,718 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:19,718 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:19,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 19:15:19,934 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:19,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1294012555, now seen corresponding path program 5 times [2021-01-06 19:15:19,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:19,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071395278] [2021-01-06 19:15:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:20,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-01-06 19:15:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-01-06 19:15:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 158 proven. 354 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2021-01-06 19:15:20,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071395278] [2021-01-06 19:15:20,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595498288] [2021-01-06 19:15:20,475 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 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 19:15:20,548 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 19:15:20,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:20,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 19:15:20,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-01-06 19:15:20,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:20,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2021-01-06 19:15:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049724085] [2021-01-06 19:15:20,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 19:15:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 19:15:20,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-01-06 19:15:20,783 INFO L87 Difference]: Start difference. First operand 100 states and 160 transitions. Second operand 18 states. [2021-01-06 19:15:21,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:21,555 INFO L93 Difference]: Finished difference Result 209 states and 364 transitions. [2021-01-06 19:15:21,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 19:15:21,555 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 144 [2021-01-06 19:15:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:21,559 INFO L225 Difference]: With dead ends: 209 [2021-01-06 19:15:21,559 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 19:15:21,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 19:15:21,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 19:15:21,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-01-06 19:15:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 19:15:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 152 transitions. [2021-01-06 19:15:21,584 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 152 transitions. Word has length 144 [2021-01-06 19:15:21,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:21,585 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 152 transitions. [2021-01-06 19:15:21,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 19:15:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 152 transitions. [2021-01-06 19:15:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-01-06 19:15:21,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:21,588 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:21,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:21,803 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:21,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:21,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 6 times [2021-01-06 19:15:21,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:21,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53500946] [2021-01-06 19:15:21,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:21,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:21,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-01-06 19:15:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-01-06 19:15:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-01-06 19:15:22,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:22,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2021-01-06 19:15:22,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53500946] [2021-01-06 19:15:22,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059467982] [2021-01-06 19:15:22,438 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 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 19:15:22,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 19:15:22,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 19:15:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2021-01-06 19:15:22,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:22,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2021-01-06 19:15:22,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733197216] [2021-01-06 19:15:22,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 19:15:22,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 19:15:22,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-01-06 19:15:22,844 INFO L87 Difference]: Start difference. First operand 100 states and 152 transitions. Second operand 24 states. [2021-01-06 19:15:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:24,014 INFO L93 Difference]: Finished difference Result 224 states and 399 transitions. [2021-01-06 19:15:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 19:15:24,015 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 157 [2021-01-06 19:15:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:24,019 INFO L225 Difference]: With dead ends: 224 [2021-01-06 19:15:24,019 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 19:15:24,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 19:15:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 19:15:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2021-01-06 19:15:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 19:15:24,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 185 transitions. [2021-01-06 19:15:24,046 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 185 transitions. Word has length 157 [2021-01-06 19:15:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:24,047 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 185 transitions. [2021-01-06 19:15:24,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 19:15:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 185 transitions. [2021-01-06 19:15:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-01-06 19:15:24,050 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:24,050 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:24,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:24,261 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:24,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:24,262 INFO L82 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 7 times [2021-01-06 19:15:24,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:24,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622998575] [2021-01-06 19:15:24,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-01-06 19:15:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-01-06 19:15:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:24,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:24,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-01-06 19:15:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-01-06 19:15:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2021-01-06 19:15:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622998575] [2021-01-06 19:15:24,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818472454] [2021-01-06 19:15:24,949 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 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 19:15:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 19:15:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:25,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2021-01-06 19:15:25,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:25,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2021-01-06 19:15:25,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257411878] [2021-01-06 19:15:25,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 19:15:25,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:25,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 19:15:25,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-01-06 19:15:25,329 INFO L87 Difference]: Start difference. First operand 115 states and 185 transitions. Second operand 25 states. [2021-01-06 19:15:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:26,708 INFO L93 Difference]: Finished difference Result 263 states and 497 transitions. [2021-01-06 19:15:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 19:15:26,708 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 170 [2021-01-06 19:15:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:26,712 INFO L225 Difference]: With dead ends: 263 [2021-01-06 19:15:26,713 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 19:15:26,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 19:15:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 19:15:26,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2021-01-06 19:15:26,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 19:15:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 218 transitions. [2021-01-06 19:15:26,741 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 218 transitions. Word has length 170 [2021-01-06 19:15:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:26,742 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 218 transitions. [2021-01-06 19:15:26,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 19:15:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 218 transitions. [2021-01-06 19:15:26,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 19:15:26,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:26,745 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:26,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 19:15:26,960 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:26,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:26,962 INFO L82 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 8 times [2021-01-06 19:15:26,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:26,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208858069] [2021-01-06 19:15:26,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-01-06 19:15:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-01-06 19:15:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-01-06 19:15:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-01-06 19:15:27,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-01-06 19:15:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-01-06 19:15:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-01-06 19:15:27,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-01-06 19:15:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-01-06 19:15:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-01-06 19:15:27,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:27,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2021-01-06 19:15:27,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208858069] [2021-01-06 19:15:27,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337235151] [2021-01-06 19:15:27,667 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 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 19:15:27,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 19:15:27,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 19:15:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 19:15:27,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2021-01-06 19:15:28,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 19:15:28,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2021-01-06 19:15:28,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871107631] [2021-01-06 19:15:28,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 19:15:28,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:28,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 19:15:28,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-01-06 19:15:28,041 INFO L87 Difference]: Start difference. First operand 130 states and 218 transitions. Second operand 26 states. [2021-01-06 19:15:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:29,140 INFO L93 Difference]: Finished difference Result 166 states and 274 transitions. [2021-01-06 19:15:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 19:15:29,146 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 183 [2021-01-06 19:15:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:29,147 INFO L225 Difference]: With dead ends: 166 [2021-01-06 19:15:29,147 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:15:29,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 19:15:29,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:15:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:15:29,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:15:29,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:15:29,151 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 183 [2021-01-06 19:15:29,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:29,151 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:15:29,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 19:15:29,152 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:15:29,152 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:15:29,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:29,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:15:29,614 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 80 [2021-01-06 19:15:29,832 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 80 [2021-01-06 19:15:32,585 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 125 DAG size of output: 48 [2021-01-06 19:15:32,695 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 9 [2021-01-06 19:15:32,717 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:15:32,718 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:15:32,718 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:15:32,718 INFO L189 CegarLoopUtils]: For program point L29(lines 29 33) no Hoare annotation was computed. [2021-01-06 19:15:32,718 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:15:32,718 INFO L192 CegarLoopUtils]: At program point L27(lines 27 47) the Hoare annotation is: true [2021-01-06 19:15:32,718 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2021-01-06 19:15:32,719 INFO L189 CegarLoopUtils]: For program point L45(line 45) no Hoare annotation was computed. [2021-01-06 19:15:32,719 INFO L189 CegarLoopUtils]: For program point L42(lines 42 46) no Hoare annotation was computed. [2021-01-06 19:15:32,719 INFO L192 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: true [2021-01-06 19:15:32,719 INFO L189 CegarLoopUtils]: For program point L41-1(line 41) no Hoare annotation was computed. [2021-01-06 19:15:32,719 INFO L189 CegarLoopUtils]: For program point L35(lines 35 40) no Hoare annotation was computed. [2021-01-06 19:15:32,719 INFO L189 CegarLoopUtils]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2021-01-06 19:15:32,719 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (or (not (<= |ackermann_#in~m| 0)) (not (<= 0 |ackermann_#in~m|)) (not (<= |ackermann_#in~n| 1)))) [2021-01-06 19:15:32,719 INFO L189 CegarLoopUtils]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-01-06 19:15:32,720 INFO L192 CegarLoopUtils]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2021-01-06 19:15:32,720 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2021-01-06 19:15:32,720 INFO L185 CegarLoopUtils]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (= |ackermann_#in~m| 0)) (.cse3 (<= |ackermann_#in~n| 2)) (.cse6 (<= 3 |ackermann_#t~ret8|)) (.cse4 (<= 5 |ackermann_#t~ret8|)) (.cse7 (<= 6 |ackermann_#t~ret8|)) (.cse8 (not (<= 1 |ackermann_#in~m|)))) (and (or (not (<= |ackermann_#in~m| 0)) (and (= ackermann_~m |ackermann_#in~m|) .cse0 .cse1)) (let ((.cse2 (<= |ackermann_#in~m| ackermann_~m)) (.cse5 (<= ackermann_~m |ackermann_#in~m|))) (or (and (<= 2 |ackermann_#t~ret8|) (<= ackermann_~m 1) .cse0 .cse2) (and (<= |ackermann_#in~m| 2) .cse3 .cse2 .cse4 .cse0 .cse5) (and (<= |ackermann_#in~n| 1) .cse6 .cse0 .cse2 .cse5) (and .cse7 .cse2 .cse0 .cse5) .cse8)) (or (not (<= |ackermann_#in~n| 0)) .cse1) (or (= |ackermann_#in~n| 1) (and .cse3 .cse6) (and .cse4 (<= |ackermann_#in~n| 4)) .cse7 (and (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret8|)) .cse8))) [2021-01-06 19:15:32,720 INFO L189 CegarLoopUtils]: For program point L20(lines 20 22) no Hoare annotation was computed. [2021-01-06 19:15:32,720 INFO L189 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2021-01-06 19:15:32,721 INFO L189 CegarLoopUtils]: For program point L23-3(line 23) no Hoare annotation was computed. [2021-01-06 19:15:32,721 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2021-01-06 19:15:32,721 INFO L189 CegarLoopUtils]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2021-01-06 19:15:32,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:15:32 BoogieIcfgContainer [2021-01-06 19:15:32,731 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:15:32,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:15:32,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:15:32,731 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:15:32,732 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:09" (3/4) ... [2021-01-06 19:15:32,735 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:15:32,742 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2021-01-06 19:15:32,746 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 19:15:32,747 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-01-06 19:15:32,747 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:15:32,747 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:15:32,795 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive/Ackermann04.c-witness.graphml [2021-01-06 19:15:32,795 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:15:32,798 INFO L168 Benchmark]: Toolchain (without parser) took 23674.07 ms. Allocated memory was 163.6 MB in the beginning and 468.7 MB in the end (delta: 305.1 MB). Free memory was 138.7 MB in the beginning and 300.0 MB in the end (delta: -161.3 MB). Peak memory consumption was 144.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:32,800 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 163.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:15:32,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.16 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 129.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:32,801 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.82 ms. Allocated memory is still 163.6 MB. Free memory was 129.0 MB in the beginning and 127.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:32,803 INFO L168 Benchmark]: Boogie Preprocessor took 20.05 ms. Allocated memory is still 163.6 MB. Free memory was 127.6 MB in the beginning and 126.7 MB in the end (delta: 937.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:32,803 INFO L168 Benchmark]: RCFGBuilder took 331.91 ms. Allocated memory is still 163.6 MB. Free memory was 126.7 MB in the beginning and 113.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:32,805 INFO L168 Benchmark]: TraceAbstraction took 22981.01 ms. Allocated memory was 163.6 MB in the beginning and 468.7 MB in the end (delta: 305.1 MB). Free memory was 113.3 MB in the beginning and 302.6 MB in the end (delta: -189.3 MB). Peak memory consumption was 251.3 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:32,805 INFO L168 Benchmark]: Witness Printer took 63.88 ms. Allocated memory is still 468.7 MB. Free memory was 302.6 MB in the beginning and 300.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:32,811 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 163.6 MB. Free memory is still 136.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 237.16 ms. Allocated memory is still 163.6 MB. Free memory was 138.5 MB in the beginning and 129.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 31.82 ms. Allocated memory is still 163.6 MB. Free memory was 129.0 MB in the beginning and 127.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.05 ms. Allocated memory is still 163.6 MB. Free memory was 127.6 MB in the beginning and 126.7 MB in the end (delta: 937.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 331.91 ms. Allocated memory is still 163.6 MB. Free memory was 126.7 MB in the beginning and 113.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22981.01 ms. Allocated memory was 163.6 MB in the beginning and 468.7 MB in the end (delta: 305.1 MB). Free memory was 113.3 MB in the beginning and 302.6 MB in the end (delta: -189.3 MB). Peak memory consumption was 251.3 MB. Max. memory is 8.0 GB. * Witness Printer took 63.88 ms. Allocated memory is still 468.7 MB. Free memory was 302.6 MB in the beginning and 300.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.5s, OverallIterations: 10, TraceHistogramMax: 27, AutomataDifference: 9.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 248 SDtfs, 416 SDslu, 1210 SDs, 0 SdLazy, 4191 SolverSat, 1334 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1650 GetRequests, 1279 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5492 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 98 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 534 PreInvPairs, 1300 NumberOfFragments, 155 HoareAnnotationTreeSize, 534 FomulaSimplifications, 194754 FormulaSimplificationTreeSizeReduction, 2.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 4122 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 1986 NumberOfCodeBlocks, 1878 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1967 ConstructedInterpolants, 0 QuantifiedInterpolants, 515331 SizeOfPredicates, 65 NumberOfNonLiveVariables, 2787 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 11448/14212 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...