/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/sum_10x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 09:27:12,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 09:27:12,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 09:27:12,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 09:27:12,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 09:27:12,228 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 09:27:12,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 09:27:12,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 09:27:12,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 09:27:12,250 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 09:27:12,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 09:27:12,258 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 09:27:12,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 09:27:12,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 09:27:12,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 09:27:12,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 09:27:12,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 09:27:12,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 09:27:12,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 09:27:12,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 09:27:12,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 09:27:12,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 09:27:12,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 09:27:12,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 09:27:12,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 09:27:12,320 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 09:27:12,321 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 09:27:12,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 09:27:12,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 09:27:12,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 09:27:12,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 09:27:12,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 09:27:12,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 09:27:12,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 09:27:12,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 09:27:12,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 09:27:12,372 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 09:27:12,426 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 09:27:12,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 09:27:12,431 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 09:27:12,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 09:27:12,432 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 09:27:12,432 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 09:27:12,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 09:27:12,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 09:27:12,433 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 09:27:12,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 09:27:12,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 09:27:12,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 09:27:12,435 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 09:27:12,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 09:27:12,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 09:27:12,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 09:27:12,436 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 09:27:12,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:27:12,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 09:27:12,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 09:27:12,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 09:27:12,437 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 09:27:12,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 09:27:12,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 09:27:12,438 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 09:27:12,438 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 09:27:12,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 09:27:12,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 09:27:12,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 09:27:12,960 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 09:27:12,961 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 09:27:12,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2020-12-23 09:27:13,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/998d03df7/a7fa04cc340d478da0da710c1d8f5d30/FLAGbfb3d6a4a [2020-12-23 09:27:13,746 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 09:27:13,747 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2020-12-23 09:27:13,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/998d03df7/a7fa04cc340d478da0da710c1d8f5d30/FLAGbfb3d6a4a [2020-12-23 09:27:14,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/998d03df7/a7fa04cc340d478da0da710c1d8f5d30 [2020-12-23 09:27:14,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 09:27:14,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 09:27:14,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:14,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 09:27:14,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 09:27:14,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16e6d999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14, skipping insertion in model container [2020-12-23 09:27:14,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,112 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 09:27:14,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 09:27:14,312 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2020-12-23 09:27:14,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:14,337 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 09:27:14,362 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2020-12-23 09:27:14,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 09:27:14,387 INFO L208 MainTranslator]: Completed translation [2020-12-23 09:27:14,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14 WrapperNode [2020-12-23 09:27:14,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 09:27:14,391 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:14,391 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 09:27:14,391 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 09:27:14,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 09:27:14,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 09:27:14,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 09:27:14,444 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 09:27:14,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... [2020-12-23 09:27:14,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 09:27:14,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 09:27:14,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 09:27:14,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 09:27:14,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 09:27:14,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 09:27:14,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 09:27:14,621 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-12-23 09:27:14,622 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-12-23 09:27:14,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 09:27:14,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 09:27:14,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 09:27:14,971 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-23 09:27:14,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:14 BoogieIcfgContainer [2020-12-23 09:27:14,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 09:27:14,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 09:27:14,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 09:27:14,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 09:27:14,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 09:27:14" (1/3) ... [2020-12-23 09:27:14,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709be3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:14, skipping insertion in model container [2020-12-23 09:27:14,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 09:27:14" (2/3) ... [2020-12-23 09:27:14,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@709be3c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 09:27:14, skipping insertion in model container [2020-12-23 09:27:14,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:14" (3/3) ... [2020-12-23 09:27:14,982 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2020-12-23 09:27:14,989 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 09:27:14,994 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 09:27:15,016 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 09:27:15,049 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 09:27:15,074 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 09:27:15,075 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 09:27:15,075 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 09:27:15,079 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 09:27:15,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 09:27:15,080 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 09:27:15,080 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 09:27:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-23 09:27:15,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 09:27:15,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:15,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:15,180 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:15,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:15,196 INFO L82 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2020-12-23 09:27:15,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:15,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720171426] [2020-12-23 09:27:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:15,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:15,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 09:27:15,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720171426] [2020-12-23 09:27:15,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 09:27:15,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 09:27:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394795741] [2020-12-23 09:27:15,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 09:27:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:15,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 09:27:15,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 09:27:15,562 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 5 states. [2020-12-23 09:27:15,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:15,667 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 09:27:15,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 09:27:15,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 09:27:15,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:15,680 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:15,680 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 09:27:15,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 09:27:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 09:27:15,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 09:27:15,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 09:27:15,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-23 09:27:15,737 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-23 09:27:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:15,738 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-23 09:27:15,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 09:27:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-23 09:27:15,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 09:27:15,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:15,741 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:15,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 09:27:15,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:15,742 INFO L82 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2020-12-23 09:27:15,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:15,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525545642] [2020-12-23 09:27:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:15,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:15,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525545642] [2020-12-23 09:27:15,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636728913] [2020-12-23 09:27:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:15,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 09:27:15,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 09:27:16,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:16,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 09:27:16,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408385847] [2020-12-23 09:27:16,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 09:27:16,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:16,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 09:27:16,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 09:27:16,089 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 7 states. [2020-12-23 09:27:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:16,160 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-23 09:27:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 09:27:16,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 09:27:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:16,162 INFO L225 Difference]: With dead ends: 22 [2020-12-23 09:27:16,162 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 09:27:16,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:27:16,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 09:27:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 09:27:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 09:27:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-23 09:27:16,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-23 09:27:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:16,171 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-23 09:27:16,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 09:27:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-23 09:27:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 09:27:16,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:16,172 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:16,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 09:27:16,387 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:16,392 INFO L82 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2020-12-23 09:27:16,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:16,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082018266] [2020-12-23 09:27:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:27:16,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082018266] [2020-12-23 09:27:16,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927164203] [2020-12-23 09:27:16,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:16,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:16,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:16,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 09:27:16,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 09:27:16,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:16,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 09:27:16,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940363116] [2020-12-23 09:27:16,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 09:27:16,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:16,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 09:27:16,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 09:27:16,774 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-12-23 09:27:16,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:16,867 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-23 09:27:16,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 09:27:16,868 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-12-23 09:27:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:16,870 INFO L225 Difference]: With dead ends: 25 [2020-12-23 09:27:16,870 INFO L226 Difference]: Without dead ends: 21 [2020-12-23 09:27:16,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:27:16,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-23 09:27:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-23 09:27:16,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 09:27:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-23 09:27:16,877 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-23 09:27:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:16,878 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-23 09:27:16,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 09:27:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-23 09:27:16,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 09:27:16,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:16,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:17,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:17,095 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:17,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:17,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2020-12-23 09:27:17,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:17,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013364634] [2020-12-23 09:27:17,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:27:17,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013364634] [2020-12-23 09:27:17,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392390641] [2020-12-23 09:27:17,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:17,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 09:27:17,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:17,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 09:27:17,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:17,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 09:27:17,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:17,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 09:27:17,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169515957] [2020-12-23 09:27:17,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 09:27:17,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:17,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 09:27:17,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 09:27:17,427 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-12-23 09:27:17,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:17,518 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-23 09:27:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 09:27:17,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-23 09:27:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:17,520 INFO L225 Difference]: With dead ends: 28 [2020-12-23 09:27:17,520 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 09:27:17,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:27:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 09:27:17,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 09:27:17,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 09:27:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 09:27:17,528 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-23 09:27:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:17,528 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 09:27:17,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 09:27:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 09:27:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 09:27:17,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:17,530 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:17,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:17,746 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:17,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:17,748 INFO L82 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2020-12-23 09:27:17,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:17,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734816349] [2020-12-23 09:27:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:17,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:17,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:17,914 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:27:17,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734816349] [2020-12-23 09:27:17,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787214898] [2020-12-23 09:27:17,915 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:17,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:17,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 09:27:17,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-23 09:27:18,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:18,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 09:27:18,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916626639] [2020-12-23 09:27:18,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 09:27:18,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:18,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 09:27:18,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 09:27:18,059 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-12-23 09:27:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:18,152 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-23 09:27:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 09:27:18,152 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-12-23 09:27:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:18,154 INFO L225 Difference]: With dead ends: 31 [2020-12-23 09:27:18,154 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 09:27:18,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:27:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 09:27:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 09:27:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 09:27:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-23 09:27:18,161 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-23 09:27:18,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:18,161 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-23 09:27:18,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 09:27:18,162 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-23 09:27:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 09:27:18,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:18,163 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:18,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:18,378 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2020-12-23 09:27:18,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:18,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137632914] [2020-12-23 09:27:18,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:27:18,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137632914] [2020-12-23 09:27:18,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213262684] [2020-12-23 09:27:18,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:18,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 09:27:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:18,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 09:27:18,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 09:27:18,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:18,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 09:27:18,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110832866] [2020-12-23 09:27:18,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 09:27:18,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 09:27:18,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 09:27:18,718 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-12-23 09:27:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:18,829 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 09:27:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 09:27:18,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-12-23 09:27:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:18,831 INFO L225 Difference]: With dead ends: 34 [2020-12-23 09:27:18,832 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 09:27:18,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-12-23 09:27:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 09:27:18,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-23 09:27:18,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 09:27:18,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-23 09:27:18,839 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2020-12-23 09:27:18,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:18,839 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-23 09:27:18,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 09:27:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-23 09:27:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 09:27:18,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:18,841 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:19,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 09:27:19,055 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2020-12-23 09:27:19,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:19,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628384650] [2020-12-23 09:27:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:27:19,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628384650] [2020-12-23 09:27:19,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880483789] [2020-12-23 09:27:19,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:19,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 09:27:19,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:19,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 09:27:19,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:19,415 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-23 09:27:19,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:19,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 09:27:19,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589876888] [2020-12-23 09:27:19,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 09:27:19,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:19,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 09:27:19,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-23 09:27:19,418 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-12-23 09:27:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:19,538 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-12-23 09:27:19,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 09:27:19,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-23 09:27:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:19,541 INFO L225 Difference]: With dead ends: 37 [2020-12-23 09:27:19,541 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 09:27:19,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-23 09:27:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 09:27:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 09:27:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 09:27:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-12-23 09:27:19,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2020-12-23 09:27:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:19,548 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-12-23 09:27:19,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 09:27:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-12-23 09:27:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 09:27:19,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:19,550 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:19,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:19,764 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:19,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:19,765 INFO L82 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2020-12-23 09:27:19,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:19,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112885997] [2020-12-23 09:27:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:19,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:19,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:27:20,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112885997] [2020-12-23 09:27:20,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669716420] [2020-12-23 09:27:20,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 09:27:20,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-23 09:27:20,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:20,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 09:27:20,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615026214] [2020-12-23 09:27:20,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 09:27:20,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 09:27:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-12-23 09:27:20,264 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-12-23 09:27:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:20,410 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-12-23 09:27:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 09:27:20,410 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2020-12-23 09:27:20,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:20,412 INFO L225 Difference]: With dead ends: 40 [2020-12-23 09:27:20,412 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 09:27:20,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-12-23 09:27:20,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 09:27:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-23 09:27:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 09:27:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 09:27:20,420 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2020-12-23 09:27:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:20,420 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 09:27:20,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 09:27:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 09:27:20,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 09:27:20,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:20,422 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:20,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:20,637 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:20,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:20,638 INFO L82 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2020-12-23 09:27:20,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:20,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329627092] [2020-12-23 09:27:20,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:27:20,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329627092] [2020-12-23 09:27:20,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927277918] [2020-12-23 09:27:20,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:21,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 09:27:21,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 09:27:21,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-23 09:27:21,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:21,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 09:27:21,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461256118] [2020-12-23 09:27:21,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 09:27:21,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 09:27:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 09:27:21,213 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-12-23 09:27:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:21,366 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 09:27:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 09:27:21,366 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2020-12-23 09:27:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:21,371 INFO L225 Difference]: With dead ends: 43 [2020-12-23 09:27:21,371 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 09:27:21,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-12-23 09:27:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 09:27:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-23 09:27:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 09:27:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 09:27:21,378 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2020-12-23 09:27:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:21,379 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 09:27:21,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 09:27:21,379 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 09:27:21,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 09:27:21,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:21,380 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:21,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 09:27:21,594 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:21,595 INFO L82 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2020-12-23 09:27:21,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:21,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198678926] [2020-12-23 09:27:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:27:21,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198678926] [2020-12-23 09:27:21,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897338849] [2020-12-23 09:27:21,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:22,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 09:27:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:22,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 09:27:22,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-23 09:27:22,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:22,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 09:27:22,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975322985] [2020-12-23 09:27:22,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 09:27:22,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:22,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 09:27:22,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-23 09:27:22,224 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-12-23 09:27:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:22,373 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-12-23 09:27:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 09:27:22,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2020-12-23 09:27:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:22,374 INFO L225 Difference]: With dead ends: 46 [2020-12-23 09:27:22,374 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 09:27:22,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-12-23 09:27:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 09:27:22,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-23 09:27:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 09:27:22,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-12-23 09:27:22,382 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2020-12-23 09:27:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:22,382 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-12-23 09:27:22,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 09:27:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-12-23 09:27:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 09:27:22,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 09:27:22,383 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 09:27:22,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:22,599 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 09:27:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 09:27:22,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2020-12-23 09:27:22,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 09:27:22,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157814020] [2020-12-23 09:27:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 09:27:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:22,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:22,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:22,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-23 09:27:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 09:27:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 144 proven. 20 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2020-12-23 09:27:23,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157814020] [2020-12-23 09:27:23,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175354058] [2020-12-23 09:27:23,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:23,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 09:27:23,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 09:27:23,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 09:27:23,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 09:27:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-23 09:27:25,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 09:27:25,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 54 [2020-12-23 09:27:25,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326661043] [2020-12-23 09:27:25,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 09:27:25,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 09:27:25,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 09:27:25,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2657, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 09:27:25,325 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 54 states. [2020-12-23 09:27:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 09:27:27,955 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-23 09:27:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 09:27:27,955 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 70 [2020-12-23 09:27:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 09:27:27,956 INFO L225 Difference]: With dead ends: 45 [2020-12-23 09:27:27,956 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 09:27:27,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=535, Invalid=5785, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 09:27:27,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 09:27:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 09:27:27,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 09:27:27,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 09:27:27,962 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2020-12-23 09:27:27,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 09:27:27,963 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 09:27:27,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 09:27:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 09:27:27,963 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 09:27:28,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 09:27:28,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 09:27:28,208 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 09:27:28,208 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 09:27:28,208 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 09:27:28,209 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 09:27:28,209 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2020-12-23 09:27:28,209 INFO L189 CegarLoopUtils]: For program point L18(line 18) no Hoare annotation was computed. [2020-12-23 09:27:28,209 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-23 09:27:28,209 INFO L185 CegarLoopUtils]: At program point L16(line 16) the Hoare annotation is: (and (= ULTIMATE.start_main_~a~0 10) (= ULTIMATE.start_main_~b~0 0)) [2020-12-23 09:27:28,209 INFO L189 CegarLoopUtils]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-12-23 09:27:28,210 INFO L189 CegarLoopUtils]: For program point L13(lines 13 20) no Hoare annotation was computed. [2020-12-23 09:27:28,210 INFO L189 CegarLoopUtils]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2020-12-23 09:27:28,210 INFO L185 CegarLoopUtils]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (<= 1 sum_~n) (= sum_~m |sum_#in~m|)) [2020-12-23 09:27:28,210 INFO L189 CegarLoopUtils]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-12-23 09:27:28,210 INFO L189 CegarLoopUtils]: For program point L6(lines 6 10) no Hoare annotation was computed. [2020-12-23 09:27:28,210 INFO L189 CegarLoopUtils]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2020-12-23 09:27:28,210 INFO L192 CegarLoopUtils]: At program point sumENTRY(lines 5 11) the Hoare annotation is: true [2020-12-23 09:27:28,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 09:27:28 BoogieIcfgContainer [2020-12-23 09:27:28,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 09:27:28,217 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 09:27:28,217 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 09:27:28,217 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 09:27:28,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 09:27:14" (3/4) ... [2020-12-23 09:27:28,221 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 09:27:28,228 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2020-12-23 09:27:28,232 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-23 09:27:28,232 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-23 09:27:28,232 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:28,232 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 09:27:28,271 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/sum_10x0-1.c-witness.graphml [2020-12-23 09:27:28,271 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 09:27:28,273 INFO L168 Benchmark]: Toolchain (without parser) took 14180.44 ms. Allocated memory was 161.5 MB in the beginning and 319.8 MB in the end (delta: 158.3 MB). Free memory was 137.2 MB in the beginning and 118.2 MB in the end (delta: 19.0 MB). Peak memory consumption was 178.7 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:28,274 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory is still 136.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 09:27:28,274 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.06 ms. Allocated memory is still 161.5 MB. Free memory was 137.0 MB in the beginning and 127.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:28,275 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 161.5 MB. Free memory was 127.8 MB in the beginning and 126.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:28,275 INFO L168 Benchmark]: Boogie Preprocessor took 40.75 ms. Allocated memory is still 161.5 MB. Free memory was 126.5 MB in the beginning and 125.6 MB in the end (delta: 916.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:28,276 INFO L168 Benchmark]: RCFGBuilder took 488.05 ms. Allocated memory is still 161.5 MB. Free memory was 125.6 MB in the beginning and 114.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:28,277 INFO L168 Benchmark]: TraceAbstraction took 13241.57 ms. Allocated memory was 161.5 MB in the beginning and 319.8 MB in the end (delta: 158.3 MB). Free memory was 113.9 MB in the beginning and 120.8 MB in the end (delta: -6.9 MB). Peak memory consumption was 152.5 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:28,277 INFO L168 Benchmark]: Witness Printer took 54.65 ms. Allocated memory is still 319.8 MB. Free memory was 120.8 MB in the beginning and 118.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 09:27:28,281 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 161.5 MB. Free memory is still 136.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.06 ms. Allocated memory is still 161.5 MB. Free memory was 137.0 MB in the beginning and 127.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.00 ms. Allocated memory is still 161.5 MB. Free memory was 127.8 MB in the beginning and 126.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.75 ms. Allocated memory is still 161.5 MB. Free memory was 126.5 MB in the beginning and 125.6 MB in the end (delta: 916.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 488.05 ms. Allocated memory is still 161.5 MB. Free memory was 125.6 MB in the beginning and 114.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13241.57 ms. Allocated memory was 161.5 MB in the beginning and 319.8 MB in the end (delta: 158.3 MB). Free memory was 113.9 MB in the beginning and 120.8 MB in the end (delta: -6.9 MB). Peak memory consumption was 152.5 MB. Max. memory is 8.0 GB. * Witness Printer took 54.65 ms. Allocated memory is still 319.8 MB. Free memory was 120.8 MB in the beginning and 118.2 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 13.1s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 108 SDtfs, 303 SDslu, 768 SDs, 0 SdLazy, 1331 SolverSat, 161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 745 GetRequests, 528 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 870 NumberOfCodeBlocks, 864 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 849 ConstructedInterpolants, 0 QuantifiedInterpolants, 148422 SizeOfPredicates, 79 NumberOfNonLiveVariables, 1511 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 1345/2420 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...