/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/loops/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:40:38,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:40:38,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:40:38,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:40:38,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:40:38,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:40:38,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:40:38,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:40:38,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:40:38,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:40:38,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:40:38,622 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:40:38,622 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:40:38,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:40:38,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:40:38,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:40:38,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:40:38,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:40:38,633 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:40:38,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:40:38,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:40:38,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:40:38,649 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:40:38,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:40:38,667 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:40:38,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:40:38,671 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:40:38,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:40:38,673 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:40:38,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:40:38,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:40:38,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:40:38,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:40:38,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:40:38,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:40:38,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:40:38,679 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:40:38,706 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:40:38,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:40:38,708 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:40:38,708 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:40:38,709 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:40:38,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:40:38,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:40:38,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:40:38,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:40:38,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:40:38,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:40:38,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:40:38,711 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:40:38,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:40:38,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:40:38,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:40:38,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:40:38,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:40:38,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:40:38,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:40:38,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:40:38,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:40:38,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:40:38,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:40:38,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:40:38,714 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:40:39,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:40:39,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:40:39,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:40:39,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:40:39,183 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:40:39,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum04-1.i [2021-01-06 16:40:39,277 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dc8fc4ff7/4dd0cd05443548c2b2ffc19ccac7fe0b/FLAG48fc1651d [2021-01-06 16:40:39,875 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:40:39,876 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/sum04-1.i [2021-01-06 16:40:39,883 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dc8fc4ff7/4dd0cd05443548c2b2ffc19ccac7fe0b/FLAG48fc1651d [2021-01-06 16:40:40,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dc8fc4ff7/4dd0cd05443548c2b2ffc19ccac7fe0b [2021-01-06 16:40:40,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:40:40,220 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:40:40,222 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:40,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:40:40,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:40:40,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e898e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40, skipping insertion in model container [2021-01-06 16:40:40,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:40:40,255 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:40:40,398 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/loops/sum04-1.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2021-01-06 16:40:40,412 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:40,422 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:40:40,438 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/loops/sum04-1.i[808,821] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~sn~0,] [2021-01-06 16:40:40,441 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:40:40,459 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:40:40,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40 WrapperNode [2021-01-06 16:40:40,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:40:40,461 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:40,461 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:40:40,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:40:40,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,478 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:40:40,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:40:40,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:40:40,499 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:40:40,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,517 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... [2021-01-06 16:40:40,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:40:40,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:40:40,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:40:40,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:40:40,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:40:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:40:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:40:40,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:40:40,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:40:40,886 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:40:40,886 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:40:40,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:40 BoogieIcfgContainer [2021-01-06 16:40:40,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:40:40,891 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:40:40,891 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:40:40,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:40:40,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:40:40" (1/3) ... [2021-01-06 16:40:40,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d61538e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:40, skipping insertion in model container [2021-01-06 16:40:40,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:40:40" (2/3) ... [2021-01-06 16:40:40,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d61538e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:40:40, skipping insertion in model container [2021-01-06 16:40:40,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:40" (3/3) ... [2021-01-06 16:40:40,898 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2021-01-06 16:40:40,906 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:40:40,911 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:40:40,936 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:40:40,969 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:40:40,970 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:40:40,970 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:40:40,970 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:40:40,970 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:40:40,971 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:40:40,971 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:40:40,971 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:40:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:40:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:40:40,995 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:40,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:40:40,996 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:41,004 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-01-06 16:40:41,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:41,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843997878] [2021-01-06 16:40:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:41,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843997878] [2021-01-06 16:40:41,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:41,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:40:41,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831889448] [2021-01-06 16:40:41,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:40:41,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:41,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:40:41,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:41,240 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 16:40:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:41,257 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-01-06 16:40:41,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:40:41,258 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:40:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:41,268 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:40:41,268 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 16:40:41,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:40:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 16:40:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 16:40:41,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:40:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-01-06 16:40:41,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-01-06 16:40:41,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:41,309 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-01-06 16:40:41,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:40:41,310 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-01-06 16:40:41,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:40:41,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:41,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:40:41,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:40:41,311 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-01-06 16:40:41,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:41,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547427668] [2021-01-06 16:40:41,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:41,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547427668] [2021-01-06 16:40:41,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:41,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:40:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741932064] [2021-01-06 16:40:41,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:40:41,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:41,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:40:41,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:40:41,379 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2021-01-06 16:40:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:41,416 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-01-06 16:40:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:40:41,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:40:41,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:41,419 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:40:41,419 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:40:41,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:40:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:40:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 16:40:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:40:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 16:40:41,424 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-01-06 16:40:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:41,425 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 16:40:41,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:40:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 16:40:41,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:40:41,426 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:41,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:41,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:40:41,427 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:41,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:41,428 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-01-06 16:40:41,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:41,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943230002] [2021-01-06 16:40:41,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:41,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943230002] [2021-01-06 16:40:41,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995224428] [2021-01-06 16:40:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:41,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:40:41,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:41,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:41,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:40:41,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982619616] [2021-01-06 16:40:41,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:40:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:41,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:40:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:41,725 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2021-01-06 16:40:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:41,777 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-01-06 16:40:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:40:41,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-06 16:40:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:41,779 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:40:41,780 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:40:41,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:40:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:40:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 16:40:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:40:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:40:41,785 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-01-06 16:40:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:41,785 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:40:41,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:40:41,785 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:40:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:40:41,786 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:41,786 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:41,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:40:42,000 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:42,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash 951667218, now seen corresponding path program 2 times [2021-01-06 16:40:42,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:42,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796046303] [2021-01-06 16:40:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:40:42,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796046303] [2021-01-06 16:40:42,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:40:42,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 16:40:42,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164165535] [2021-01-06 16:40:42,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:40:42,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:40:42,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:40:42,051 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 4 states. [2021-01-06 16:40:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:42,076 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-01-06 16:40:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:40:42,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 16:40:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:42,077 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:40:42,077 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:40:42,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 16:40:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:40:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-01-06 16:40:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:40:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 16:40:42,082 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2021-01-06 16:40:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:42,082 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 16:40:42,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:40:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 16:40:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:40:42,083 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:42,084 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:42,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:40:42,084 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1635223064, now seen corresponding path program 1 times [2021-01-06 16:40:42,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:42,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170780630] [2021-01-06 16:40:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:42,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:42,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:42,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170780630] [2021-01-06 16:40:42,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892574785] [2021-01-06 16:40:42,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:42,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:40:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:42,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:42,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:40:42,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354993536] [2021-01-06 16:40:42,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:40:42,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:42,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:40:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:40:42,227 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 6 states. [2021-01-06 16:40:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:42,267 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-01-06 16:40:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:40:42,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 16:40:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:42,270 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:40:42,270 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 16:40:42,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:40:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 16:40:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 16:40:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:40:42,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 16:40:42,276 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-01-06 16:40:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:42,276 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 16:40:42,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:40:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 16:40:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:40:42,277 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:42,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:42,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:42,493 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:42,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:42,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1967544752, now seen corresponding path program 2 times [2021-01-06 16:40:42,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:42,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598720707] [2021-01-06 16:40:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598720707] [2021-01-06 16:40:42,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309248210] [2021-01-06 16:40:42,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:42,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:40:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:42,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:40:42,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:42,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:42,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:40:42,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003764286] [2021-01-06 16:40:42,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:40:42,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:42,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:40:42,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:40:42,674 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 8 states. [2021-01-06 16:40:42,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:42,718 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-01-06 16:40:42,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:40:42,719 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2021-01-06 16:40:42,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:42,721 INFO L225 Difference]: With dead ends: 28 [2021-01-06 16:40:42,721 INFO L226 Difference]: Without dead ends: 24 [2021-01-06 16:40:42,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:40:42,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-01-06 16:40:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2021-01-06 16:40:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:40:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-01-06 16:40:42,727 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2021-01-06 16:40:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:42,728 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-01-06 16:40:42,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:40:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-01-06 16:40:42,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:40:42,729 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:42,729 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:42,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:42,944 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:42,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:42,946 INFO L82 PathProgramCache]: Analyzing trace with hash -110765798, now seen corresponding path program 3 times [2021-01-06 16:40:42,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:42,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804214671] [2021-01-06 16:40:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:43,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804214671] [2021-01-06 16:40:43,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010713894] [2021-01-06 16:40:43,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:43,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 16:40:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:43,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:40:43,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:40:43,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:43,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 8 [2021-01-06 16:40:43,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294132455] [2021-01-06 16:40:43,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:40:43,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:43,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:40:43,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:40:43,195 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 8 states. [2021-01-06 16:40:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:43,284 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-01-06 16:40:43,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:40:43,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 16:40:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:43,285 INFO L225 Difference]: With dead ends: 31 [2021-01-06 16:40:43,286 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:40:43,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:40:43,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:40:43,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-01-06 16:40:43,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 16:40:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 16:40:43,300 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2021-01-06 16:40:43,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:43,301 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 16:40:43,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:40:43,301 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 16:40:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:40:43,302 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:43,302 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:43,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:43,519 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:43,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:43,520 INFO L82 PathProgramCache]: Analyzing trace with hash 307247632, now seen corresponding path program 4 times [2021-01-06 16:40:43,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:43,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926203731] [2021-01-06 16:40:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:43,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926203731] [2021-01-06 16:40:43,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334109317] [2021-01-06 16:40:43,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:43,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:40:43,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:43,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:40:43,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:43,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:43,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:40:43,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630521252] [2021-01-06 16:40:43,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:40:43,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:43,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:40:43,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:40:43,730 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 10 states. [2021-01-06 16:40:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:43,791 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-01-06 16:40:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:40:43,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2021-01-06 16:40:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:43,792 INFO L225 Difference]: With dead ends: 34 [2021-01-06 16:40:43,792 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 16:40:43,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:40:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 16:40:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-01-06 16:40:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:40:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 16:40:43,798 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 24 [2021-01-06 16:40:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:43,799 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 16:40:43,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:40:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 16:40:43,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:40:43,800 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:43,800 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:44,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:44,014 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash -2059817638, now seen corresponding path program 5 times [2021-01-06 16:40:44,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:44,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130690389] [2021-01-06 16:40:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:40:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:40:44,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130690389] [2021-01-06 16:40:44,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405604612] [2021-01-06 16:40:44,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:44,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 16:40:44,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:40:44,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:40:44,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:40:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:40:44,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:40:44,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-01-06 16:40:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494665130] [2021-01-06 16:40:44,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:40:44,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:40:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:40:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:40:44,312 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 10 states. [2021-01-06 16:40:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:40:44,378 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-01-06 16:40:44,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:40:44,379 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-01-06 16:40:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:40:44,380 INFO L225 Difference]: With dead ends: 35 [2021-01-06 16:40:44,380 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 16:40:44,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:40:44,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 16:40:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 16:40:44,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 16:40:44,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-01-06 16:40:44,385 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 27 [2021-01-06 16:40:44,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:40:44,386 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-01-06 16:40:44,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:40:44,386 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-01-06 16:40:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:40:44,387 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:40:44,387 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:40:44,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:40:44,602 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:40:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:40:44,603 INFO L82 PathProgramCache]: Analyzing trace with hash -233243184, now seen corresponding path program 6 times [2021-01-06 16:40:44,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:40:44,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899201805] [2021-01-06 16:40:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:40:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:40:44,621 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:40:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:40:44,635 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:40:44,667 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:40:44,667 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:40:44,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 16:40:44,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:40:44 BoogieIcfgContainer [2021-01-06 16:40:44,703 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:40:44,703 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:40:44,703 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:40:44,703 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:40:44,704 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:40:40" (3/4) ... [2021-01-06 16:40:44,706 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:40:44,761 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/sum04-1.i-witness.graphml [2021-01-06 16:40:44,761 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:40:44,763 INFO L168 Benchmark]: Toolchain (without parser) took 4542.77 ms. Allocated memory is still 152.0 MB. Free memory was 126.6 MB in the beginning and 60.4 MB in the end (delta: 66.1 MB). Peak memory consumption was 67.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:44,763 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:40:44,764 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.29 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:44,765 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.89 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:44,765 INFO L168 Benchmark]: Boogie Preprocessor took 21.86 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 114.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:44,766 INFO L168 Benchmark]: RCFGBuilder took 368.02 ms. Allocated memory is still 152.0 MB. Free memory was 114.5 MB in the beginning and 103.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:44,767 INFO L168 Benchmark]: TraceAbstraction took 3811.97 ms. Allocated memory is still 152.0 MB. Free memory was 103.3 MB in the beginning and 63.1 MB in the end (delta: 40.2 MB). Peak memory consumption was 41.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:44,767 INFO L168 Benchmark]: Witness Printer took 57.88 ms. Allocated memory is still 152.0 MB. Free memory was 63.1 MB in the beginning and 60.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:40:44,773 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 238.29 ms. Allocated memory is still 152.0 MB. Free memory was 126.3 MB in the beginning and 116.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 36.89 ms. Allocated memory is still 152.0 MB. Free memory was 116.9 MB in the beginning and 115.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.86 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 114.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 368.02 ms. Allocated memory is still 152.0 MB. Free memory was 114.5 MB in the beginning and 103.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3811.97 ms. Allocated memory is still 152.0 MB. Free memory was 103.3 MB in the beginning and 63.1 MB in the end (delta: 40.2 MB). Peak memory consumption was 41.0 MB. Max. memory is 8.0 GB. * Witness Printer took 57.88 ms. Allocated memory is still 152.0 MB. Free memory was 63.1 MB in the beginning and 60.4 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: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, sn=0; [L24] i=1 [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND TRUE i<4 [L26] sn = sn + (2) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND TRUE i<=8 [L25] COND FALSE !(i<4) [L24] i++ [L24] COND FALSE !(i<=8) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 10, TraceHistogramMax: 8, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 64 SDtfs, 68 SDslu, 120 SDs, 0 SdLazy, 174 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 10 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 282 NumberOfCodeBlocks, 277 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 237 ConstructedInterpolants, 0 QuantifiedInterpolants, 10573 SizeOfPredicates, 0 NumberOfNonLiveVariables, 323 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 87/387 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 incorrect! Received shutdown request...